U.S. Department

of Commerce

r'L INST. OF, STAND TEjjJj National B

of Standai

NBS

J\ PUBLICATIONS

NBS Special Pubifcation 260

NBS Standard Reference

Materials Catalog

1981-83 Edition

Four 1906 cast irons (right), and nearly

1 ,000 SRM's of today
*—

NATIONAL BUREAU OF STANDARDS

The National Bureau of Standards' was established by an act of Congress on March 3, 1901. The Bureau's overall goal is to strengthen and advance the Nation's science and technology and facilitate their effective application for public benefit. To this end, the Bureau conducts

research and provides: (1) a basis for the Nation's physical measurement system, (2) scientific and technological services for industry and government, (3) a technical basis for equity in trade, and (4) technical services to promote public safety. The Bureau's technical work is per- formed by the National Measurement Laboratory, the National Engineering Laboratory, and

the Institute for Computer Sciences and Technology. THE NATIONAL MEASUREMENT LABORATORY provides the national system of

physical and chemical and materials measurement; coordinates the system with measurement

systems of other nations and furnishes essential services leading to accurate and uniform

physical and chemical measurement throughout the Nation's scientific community, industry, and commerce; conducts materials research leading to improved methods of measurement,

standards, and data on the properties of materials needed by industry, commerce, educational

institutions, and Government; provides advisory and research services to other Government

agencies; develops, produces, and distributes Standard Reference Materials; and provides

calibration services. The Laboratory consists of the following centers: Absolute Physical Quantities2 — Radiation Research — Thermodynamics and

Molecular Science — Analytical Chemistry — Materials Science. THE NATIONAL ENGINEERING LABORATORY provides technology and technical ser- vices to the public and private sectors to address national needs and to solve national problems; conducts research in engineering and applied science in support of these efforts; builds and maintains competence in the necessary disciplines required to carry out this research and technical service; develops engineering data and measurement capabilities; provides engineering measurement traceability services; develops test methods and proposes

engineering standards and code changes; develops and proposes new engineering practices; and develops and improves mechanisms to transfer results of its research to the ultimate user. The Laboratory consists of the following centers: Applied Mathematics — Electronics and Electrical Engineering2 — Mechanical

Engineering and Process Technology2 — Building Technology — Fire Research —

Consumer Product Technology — Field Methods. THE INSTITUTE FOR COMPUTER SCIENCES AND TECHNOLOGY conducts

research and provides scientific and technical services to aid Federal agencies in the selection, acquisition, application, and use of computer technology to improve effectiveness and economy in Government operations in accordance with Public Law 89-306 (40 U.S.C. 759), relevant Executive Orders, and other directives; carries out this mission by managing the Federal Information Processing Standards Program, developing Federal ADP standards

guidelines, and managing Federal participation in ADP voluntary standardization activities; provides scientific and technological advisory services and assistance to Federal agencies; and

provides the technical foundation for computer-related policies of the Federal Government. The Institute consists of the following centers: Programming Science and Technology — Computer Systems Engineering.

'Headquarters and Laboratories at Gaithersburg, MD, unless otherwise noted; mailing address Washington, DC 20234.

2 Some divisions within the center are located at Boulder, CO 80303.
NBS Special Publication 260

NBS Standard

Reference Materials

Catalog

1981-83 Edition

Office of Standard Reference Materials National Measurement Laboratory

National Bureau of Standards

Washington, DC 20234

CAUTION: The values given in the following sections are listed primarily as a guide to purchase. The values shown are nominal and may differ from those shown on

the certificates. Space limitations have required that some

values be omitted. For these reasons, the certificates issued with the standards should always be consulted to obtain the certified values.

U.S. DEPARTMENT OF COMMERCE

Malcolm Baldrige, Secretary

National Bureau of Standards

Ernest Ambler, Director

NATIONAL BtJ*BA-« Of 8TANDABM

LIBRARY DEC 1 0 1981 Dot ttc- ~(Luudi

, U4T*7

Issued November 1981
National Bureau of Standards Special Publication 260

Supersedes NBS Spec. Publ. 260-1979-80 Edition

Nat. Bur. Stand. (U.S.), Spec. Publ. 260-1981-83 catalog, 122 pages (Nov. 1981) CODEN: XNBSAV

U.S. GOVERNMENT PRINTING OFFICE WASHINGTON: 1981

For sale by the Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402

Price (Add 25 percent for other than U.S. mailing).
OTHER NBS PUBLICATIONS IN THIS SERIES

Catalog of NBS Standard Reference Materials (1979-80 edition), R. W. Seward, ed., NBS

Spec. Publ. 260 (April 1979) $3.00* SN003-003-

02048-6

Michaelis, R. E., and Wyman, L. L., Standard

Reference Materials: Preparation of White Cast Iron Spectrochemical Standards, NBS Misc.

Publ. 260-1 (June 1964). COM74-1 1061**

Michaelis, R. E., Wyman, L. L., and Flitsch, R., Standard Reference Materials: Preparation of NBS Copper-Base Spectrochemical Standards, NBS Misc. Publ. 260-2 (October 1964). COM74-

11063**

Michaelis, R. E., Yakowitz, H., and Moore, G. A., Standard Reference Materials: Metallographic

Characterization of an NBS Spectrometric LowAlloy Steel Standard, NBS Misc. Publ. 260-3 (October 1964). COM74-1 1060** Hague, J. L., Mears, T. W., and Michaelis, R. E., Standard Reference Materials: Sources of

Information, NBS Misc. Publ. 260-4 (February

1965). COM74- 11059

Alvarez, R., and Flitsch, R., Standard Reference

Materials: Accuracy of Solution X-Ray Spectrometric Analysis of Copper-Base Alloys, NBS

Misc. Publ. 260-5 (March 1965). PB 168068**

Shultz, J. L, Standard Reference Materials: Methods for the Chemical Analysis of White

Cast Iron Standards, NBS Misc. Publ. 260-6

(July 1975). COM74-11068**

Bell, R. K., Standard Reference Materials: Methods for the Chemical Analysis of NBS

Copper-Base Spectrochemical Standards, NBS

Misc. Publ. 260-7 (October 1965). COM74-

11067** Richmond, M. S., Standard Reference Materials: Analysis of Uranium Concentrates at the

National Bureau of Standards, NBS Misc. Publ. 260-8 (December 1965). COM74-1 1066** Anspach, S. C, Cavallo, L. M., Garfinkel, S. B., Hutchinson, J. M. R., and Smith, C. N., Standard Reference Materials: Half Lives of Materials Used in the Preparation of Standard Reference Materials of Nineteen Radioactive Nuclides

Issued by the National Bureau of Standards, NBS Misc. Publ. 260-9 (November 1965). COM74-11065**

Yakowitz, H., Vieth, D. L., Heinrich, K. F. J., and

Michaelis, R. E., Standard Reference Materials: Homogeneity Characterization on NBS Spectrometric Standards II: Cartridge Brass and LowAlloy Steel, NBS Misc. Publ. 260-10 (December

1965). COM74-11064**

Napolitano, A., and Hawkins, E. G., Standard Reference Materials: Viscosity of Standard

Lead-Silica Glass, NBS Misc. Publ. 260-1 1 (November 1966). NBS Misc. Publ. 260-11** Yakowitz, H., Vieth, D. L., and Michaelis, R. E., Standard Reference Materials: Homogeneity

Characterization of NBS Spectrometric Standards III: White Cast Iron and Stainless Steel Powder Compact, NBS Misc. Publ. 260-12

(September 1966). NBS Misc. Publ. 260-12** Spijkerman, J. L., Snediker, D. K., Ruegg, F. C,

and DeVoe, J. R., Standard Reference Materials: Mossbauer Spectroscopy Standard for the Chemical Shift of Iron Compounds, NBS Misc. Publ. 260-13 (July 1967). NBS Misc. Publ.

260-13** Menis, O., and Sterling, J. T., Standard Reference

Materials: Determination of Oxygen in Ferrous

Materials - SRM 1090, 1091, and 1092, NBS

Misc. Publ. 260-14 (September 1966). NBS Misc.

Publ. 260-14**

Passaglia, E., and Shouse, P. J. Standard Refer- ence Materials: Recommended Method of Use

of Standard Light-Sensitive Paper for Calibrat- ing Carbon Arcs Used in Testing Textiles for Colorfastness to Light, NBS Misc. Publ. 260-15 (June 1967). (Replaced by NBS Spec. Publ. 260^1.)

Yakowitz, H., Michaelis, R. E., and Vieth, D. L., Standard Reference Materials: Homogeneity

Characterization of NBS Spectrometric Standards IV: Preparation and Microprobe Characterization of W-20% MO Alloy Fabricated by

Powder Metallurgical Methods, NBS Spec.

Publ. 260-16 (January 1969). COM74-1 1062** Catanzaro, E. J., Champion, C. E., Garner, E. L., Marinenko, G., Sappenfield, K. M., and Shields, W. R. Standard Reference Materials: Boric

Acid; Isotopic and Assay Standard Reference

Materials, NBS Spec. Publ. 260-17 (February

1970). Out of Print

iii
Geller, S. B., Mantek, P.A., and Cleveland, N.

G., Standard Reference Materials: Calibration of NBS Secondary Standard Magnetic Tape (Computer Amplitude Reference) Using the Reference Tape Amplitude Measurement

"Process A, "NBS Spec. Publ. 260-18 (November

1969). (See NBS Spec. Publ. 260-29.) Paule, R. C, and Mandel, J., Standard Reference

Materials: Analysis of Interlaboratory Measure- ments on the Vapor Pressure of Gold (Certifica- tion of Standard Reference Material 745). NBS

Spec. Publ. 260-19 (January 1970). PB190071**

Paule, R. C, and Mandel, J., Standard Reference

Materials: Analysis of Interlaboratory Measure- ments on the Vapor Pressures of Cadmium and

Silver, NBS Spec. Publ. 260-21 (January 1971). COM74-11359**

Yakowitz, H., Fiori, C. E., and Michaelis, R. E., Standard Reference Materials: Homogeneity

Characterization of Fe-3 Si Alloy, NBS Spec.

Publ. 260-22 (February 1971). COM74-1 1357**

Napolitano, A., and Hawkins, E. G., Standard

Reference Materials: Viscosity of a Standard

Borosilicate Glass, NBS Spec. Publ. 260-23 (December 1970). COM71-00157**

Sappenfield, K. M., Marineko, G., and Hague, J. L., Standard Reference Materials: Comparison

of Redox Standards, NBS Spec. Publ. 260-24 (January 1972). COM72-50058**

Hicho, G. E., Yakowitz, H., Rasberry, S. D., and

Michaelis, R. E., Standard Reference Materials: A Standard Reference Material Containing

Nominally Four Percent Austenite, NBS Spec.

Publ. 260-25 (February 1971). COM74-1 1356** Martin, J. F., Standard Reference Materials:

National Bureau of Standards-US Steel Corportion Joint Program for Determining Oxygen and Nitrogen in Steel, NBS Spec. Publ. 260-26

(February 1971). 85 cents* SN003-OO3-O0786-2

Garner, E. L., Machlan, L. A., and Shields, W. R., Standard Reference Materials: Uranium

Isotopic Standard Reference materials, NBS

Spec. Publ. 260-27 (April 1971). COM74-

11358**

Heinrich, K. F. J., Myklebust, R. L., Rasberry, S. D., and Michaelis, R. E., Standard Reference Materials: Preparation and Evaluation of SRM's 481 and 482 Gold-Silver and GoldCopper Alloys for Microanalysis, NBS Spec.

Publ. 260-28 (August 1971). COM71-50365**

Geller, S. B., Standard Reference Materials: Cali- bration of NBS Secondary Standard Magnetic Tape (Computer Amplitude Reference) Using

the Reference Tape Amplitude Measurement

"Process A-Model 2," NBS Spec. Publ. 260-29 (June 1971). COM7 1-50282 Gorozhanina, R. S., Freedman, A. Y., and

Shaievitch, A. B. (translated by M. C. Selby), Standard Reference Materials: Standard

Samples Issued in the USSR (A Translation from the Russian). NBS Spec. Publ. 260-30 (June

1971). COM71-50283**

Hust, J. G., and Sparks, L. L., Standard Reference

Materials: Thermal Conductivity of Electrolytic Iron SRM 734 from 4 to 300 K, NBS Spec. Publ. 260-31 (November 1971). COM7 1-50563** Mavrodineanu, R., and Lazar, J. W., Standard

Reference Materials: Standard Quartz Cuvettes, for High Accuracy Spectrophotometry, NBS

Spec. Publ. 260-32 (December 1973). 55 cents* SN003-003-01213-1 Wagner, H. L., Standard Reference Materials: Comparison of Original and Supplemental

SRM 705, Narrow Molecular Weight Distri- bution Polystyrene, NBS Spec. Publ. 260-33 (May 1972). COM72-50526**

Sparks, L. L., and Hust, J. G., Standard Reference

Materials: Thermoelectric Voltage, NBS Spec.

Publ. 260-34, (April 1972). COM72-50371**

Sparks, L. L., and Hust, J. G., Standard Refer- ence Materials: Thermal Conductivity of

Austenitic Stainless Steel, SRM 735 from 5

to 280 K, NBS Spec. Publ. 260-35 (April 1972.) 35 cents* COM72-50368**

Cali, J. P., Mandel, J., Moore, L. J., and Young, D.

S., Standard Reference Materials: A Referee Method for the Determination of Calcium in Serum, NBS SRM 915, NBS Spec. Publ. 260-36 (May 1972). COM72-50527**

Shultz, J. I. Bell., R. K. Rains, T. C, and Menis,

O., Standard Reference Materials: Methods of Analysis of NBS Clay Standards, NBS Spec.

Publ. 260-37 (June 1972). COM72-50692**

Richmond, J. C, and Hsia, J. J., Standard Refer- ence Materials: Preparation and Calibration of Standards of Spectral Specular Reflectance, NBS Spec. Publ. 260-38 (May 1972). COM72-

50528**

Clark, A. F., Denson, V.A., Hust, J. G., and

Powell, R. L., Standard Reference Materials The Eddy Current Decay Method for Resistivity Characterization of High-Purity Metals, NBS

Spec. Publ. 260-39 (May 1972). COM72-50529**

iv
McAdie, H. G., Garn, P. D., and Menis, O., Standard Reference Materials: Selection of Thermal

Analysis Temperature Standards Through a Cooperative Study (SRM 758, 759, 760), NBS

Spec. Publ. 26(M0 (August 1972.) COM-72

50776** Wood, L. A., and Shouse, P. J., Standard

Reference Materials: Use of Standard LightSinsitive Paper for Calibrating Carbon Arcs Used in Testing Textiles for Colorfastness to Light, NBS Spec. Publ. 260^1 (August 1972) COM72-50775**

Wagner, H. L., and Verdier, P. H., eds., Standard

Reference Materials: The Characterization of Linear Polyethylene, SRM 1475, NBS Spec. Publ. 260-42 (September 1972). COM72-

50944**

Yakowitz, H., Ruff, A. W., and Michaelis, R. E., Standard Reference Materials: Preparation and Homogeneity Characterization of an Austenitic Iron-Chromium-Nickel Alloy, NBS Spec. Publ. 260-43 (November 1972). COM73-50760**

Schooley, J. F., Soulen, R. J., Jr., and Evans, G. A.,

Jr., Standard Reference Materials: Preparation and Use of Superconductive Fixed Point

Devices, SRM 767, NBS Spec. Publ. 260-44 (December 1972). COM73-50037**

Greifer, B., Maienthal, E. J., Rains, T. C, and

Rasberry, S. D., Standard Reference Materials: Powdered Lead-Based Paint, SRM 1579, NBS

Spec. Publ. 260-45 (March 1973). COM73-

50226**

Hust, J. G., and Giarratano, P. J., Standard Refer- ence Materials: Thermal Conductivity and

Electrical Resistivity Standard Reference Materials: Austenitic Stainless Steel, SRM's 735 and

798, from 4 to 1200 K, NBS Spec. Publ. 260^6

(March 1975). SN003-003-0 1 278-5

Hust, J. G., Standard Reference Materials: Electrical Resistivity of Electrolytic Iron, SRM 797, and Austenitic Stainless Steel, SRM 798, from 5 to 280 K, NBS Spec. Publ. 260-47 (February

1974). COM74-50176** Mangum, B. W., and Wise, J. A., Standard Refer- ence Materials: Description and Use of Precision Thermometers for the Clinical Laboratory,

SRM 933 and SRM 934, NBS Spec. Publ. 260-48 (May 1974). 60 cents* SN003-O03-0 1278-5 Carpenter, B. S., and Reimer, G. M., Standard

Reference Materials: Calibrated Glass Standards for Fission Track Use, NBS Spec. Publ. 260^9 (November 1974). SN003-003-0 1344-7

Hust, J. G., and Giarratano, P. J., Standard Refer- ence Materials: Thermal Conductivity and Electrical Resistivity Standard Reference Materials:

Electrolytic Iron, SRM's 734 and 797 from 4 to 1000 K, NBS Spec. Publ. 260-50 (June 1975). 1.00* SN003-003-0 1425-7 Mavrodineanu, R., and Baldwin, J. R., Standard

Reference Materials: Glass Filters As a Standard Reference Material for Spectrophotometry;

Selection; Preparation; Certification; Use -SRM

930, NBS Spec. Publ. 260-51 (November 1975). $1.90* SN003-003-O1481-8

Hust, J. G., and Giarratano, P. J., Standard Refer- ence Materials: Thermal Conductivity and Electrical Resistivity Standard Reference Materials 730 and 799, from 4 to 3000 K, NBS Spec. Publ. 260-52 (September 1975). $1.05* SN003-003-

01464-8 Durst, R. A., Standard Reference Materials:

Standardization of pH Measurements, NBS

Spec. Publ. 260-53 (December 1975, Revised). $1.05* SN003-O03-01551-2

Burke, R. W., and Mavrodineanu, R., Standard

Reference Materials: Certification and Use of Acidic Potassium Dichromate Solutions as an

Ultraviolet Absorbance Standard, NBS Spec.

Publ. 260-54 (August 1977). $3.00* SN0O3-OO3-

01828-7

Ditmars, D. A., Cezairliyan, A., Ishihara, S., and

Douglas, T. B., Standard Reference Materials: Enthalpy and Heat Capacity; Molybdenum

SRM 781 , From 273 to 2800 K, NBS Spec. Publ. 260-55 (September 1977). $2.20* SN003003-

01836-8

Powell, R. L., Sparks, L. L., and Hust, J. G., Standard Reference Materials: Standard

Thermocouple Material, Pt.-67:SRM1967, NBS

Spec. Publ. 260-56 (February 1978). $2.20* SN0O3-O03-0 18864

Cali, J. P. and Plebanski, T., Guide to United

States Reference Materials, NBS Spec. Publ. 260-57 (February 1978). $2.20* SN003-003-

01883-0

Barnes, J. D. and Martin, G. M., Standard Refer- ence Materials: Polyester Film for Oxygen Gas

Transmission Measurements. SRM 1470, NBS

Spec. Publ. 260-58 (in press). Chang, T. and Kahn, A. H., Standard Reference

Materials: Electron Paramagnetic Resonance

Intensity Standard: SRM 2601, NBS Spec.

Publ. 260-59 (August 1978). $2.30* SN-003-

003-01975-5

v
Velapoldi, R. A., Paule, R. C, Schaffer, R., Mandel, J., and Moody, J. R., Standard Refer- ence Materials: A Reference Method for the Determination of Sodium in Serum, NBS Spec.

Publ. 260-60 (August 1978). $3.00* SN003-003

01978-0

Verdier, P. H., and Wagner. H. L., Standard Refer- ence Materials: The Characterization of Linear Polyethylene (SRM 1482, 1483, 1484), NBS

Spec. Publ. 260-61 (December 1978). $1.70* SN003-003-02006-1

Soulen, R. J., and Dove, R. B., Standard Reference

Materials: Temperature Reference Standard

for Use Below 0.5 K (SRM 768). NBS Spec.

Publ. 260-62 (April 1979. $2.30* SN003-003-

02047-8 Velapolid, R. A., Paule, R. C, Schaffer, R., Mandel, J., Machlan, L. A., and Gramlich, J. W., Standard Reference Materials: A Reference Method for the Determination of Potassium in Serum, NBS Spec. Publ. 260-63 (May 1979). $3.75 SN003-003-02068

Velapoldi, R. A., and Mielenz, K. D., Standard

Reference Materials: A Fluorescence Standard

Reference Material Quinine Sulfate Dihydrate

(SRM 936). NBS Spec. Publ. 260-64 (January

1980). $4.25* SN003-003-02 148-2. Marinenko, R. B., Heinrich, K. F. J., and Ruegg,

F. C, Standard Reference Materials: Micro- Homogeneity Studies of NBS Standard Reference

Materials, NBS Research Materials, and Other Related Samples, NBS Spec. Publ. 260-65

(September 1979). $3.50* SN003-003-021 14-1 Venable, W. H., Jr. and Eckerle, K. L., Standard

Reference Materials: Didymium Glass Filters for Calibrating the Wavelength Scale of Spectro- photometers (SRM 2009, 2010, 2013), NBS Spec.

Publ. 260-66 (October 1979). $3.50* SN003-003-

02127-0

Velapoldi, R. A., Paule, R. C, Schaffer, R., Mandel,

J., Murphy, T. J., and Gramlich, J. W., Standard

Reference Materials: A Reference Method for the Determination of Chloride in Serum, NBS Spec.

Publ. 260-67 (November 1979). $3.75* SN003-

003-02136-9 Mavrodineanu, R. and Baldwin, Jr., Standard

Reference Materials: Metal-On-Quartz Filters as a Standard Reference Material for Spectrophoto- metry-SRM 2031, NBS Spec. Publ. 260-68

(April 1980). $4.25* SN003-003-02 167-9

Velapoldi, R. A., Paule, R. C, Schaffer, R., Mandel, J., Machlan, L. A., Garner, E. L., and

Rains, T. C, Standard Reference Materials: A

Reference Method for the Determination of Lithium in Serum, NBS Spec. Publ. 360-69 (July)

1980). $4.25* SN003-003-02214-4 Marinenko, R. B., Biancaniello, F., Boyer, P. A., Ruff, A. W., DeRobertis, L., Standard Reference

Materials: Preparation and Characterization of an Iron-Chromium-Nickel Alloy for Microanalysis, NBS Spec. Publ. 260-70 (in press). Reeder, D. J., Coxon, B^Enagonio, D., Christensen, R. G., Schaffer, R., Howell, B. F., Paule, R. C,

Mandel, J., Standard Reference Materials: SRM

900, Antiepilepsy Drug Level Assay Standard, NBS Spec. Publ. 260-72 (in press).

* Send order with remittance to Superintendent of Documents, US Government Printing

Office, Washington, DC 20402. Remittance from foreign countries should include an

additional one-fourth of the purchase price for postage. ** May be ordered from: National Technical Information Services (NTIS), Springfield,

Virginia 22151.

vi
CONTENTS

Page INTRODUCTION 1 Definitions 1 Preparation and Availability of Standard Reference Materials 2 Ordering 2 Terms 3 Domestic Shipments 3 Foreign Shipments 3 CERTIFIED CHEMICAL COMPOSITION

STANDARDS 18 Steels (chip form) 18 Plain carbon Low alloy High alloy

Stainless Tool

Steels (granular form) 21

Steels (solid form) 22

Ingot iron and low alloy Special ingot irons and low alloy

Stainless Specialty High-temperature alloys Tool

Steelmaking Alloys 29 Cast Irons (chip form) 29

Cast Steels, White Cast Irons, Ductile

Irons, and Blast Furnace Irons (solid form) 30 Nonferrous Alloys (chip form) 31 Aluminum "Benchmarks" Copper

Copper "Benchmarks" Lead Magnesium

Nickel

Nickel Superalloy, Trace Elements

Nickel oxide Selenium Tin

Titanium

Zinc Zirconium

Nonferrous Alloys (solid form) 36 Aluminum "Benchmarks" Copper

Copper "Benchmarks"

Page Lead

Nickel Titanium Zinc Zirconium

Gases in Metals 41 High-Purity Metals 41 Microanalytical Standards 42

Primary, Working, and Secondary

Standard Chemicals 44 Microchemical Standards 44

Clinical Laboratory Standards 45

Biological Standards 45 Environmental Standards 47 Analyzed gases Analyzed liquids and solids Permeation tubes

Industrial Hygiene Standards 51 Forensic Standards 52 Metallo-Organic Compounds 52 Wear Metals in Oil

Fertilizers 53 Ores 53

Minerals, Refractories, Glasses, and

Carbides 55 Cements 57 Trace Element Standards 57 Nuclear Materials 59

Special nuclear materials Plutonium assay Plutonium isotopic Uranium assay Uranium isotopic Neutron density standards

Fission track glass standards

Isotopic Reference Standards 61 CERTIFIED PHYSICAL PROPERTY

STANDARDS 61 Ion Activity Standards 61 pH standards pD standards Ion selective electrodes Mechanical and Metrology Standards 62 Scanning Electron Microscope Standards.... 62

Optical Microscope Linewidth- Measurement Standards 63 Coating thickness Glass

vii
Page Page Elasticity Metallurgical 81 Density Mossbauer 81 Polymer X-ray Flourescent Emission Target 82 Rheology X-ray Diffraction 82 Heat Standards 70 Gas Transmission 82 Superconductive thermometric fixed Permittivity 83

point devices Reference Fuels 83 Freezing points Resistivity 83 Defining fixed points Determined reference points ENGINEERING TYPE STANDARDS 84 Melting points Standard Rubber and RubberCalorimetric Compounding Materials 84 Combustion Reference Magnetic Tapes 84

Solution Centerline Drawings, OCR-B 85 Heat source Sizing Standards 85 Enthalpy and heat capacity Glass spheres for particle size Vapor pressure Turbidimetric and fineness (cement) Conductivity Color Standards 85

Resistivity Light-Sensitive Papers and Plastic Chips 86 Thermal conductivity and electrical Light-Sensitive Papers

resistivity Light-Sensitive Plastic Chips Thermal expansion x. ray and photographic Standards 86 Thermocouple materials Surface Flammability Standards 87 Thermal resistance Smoke Density chamber Standards 87 Magnetic Standards 74 Tape Adhesion Testing Standard 87 Magnetic susceptibility Magnetic moment RESEARCH MATERIALS 88 Paramagnetic resonance Phosphorus

Optical Standards 75 Spectrophotometric SPECIAL REFERENCE MATERIALS 90

Reflectance Differential Thermal Analysis Standards

Specular Spectral Reflectance

Directional-Hemispherical Reflectance STANDARD REFERENCE MATERIALS

Refractive index TO BE DISCONTINUED 92

Radioactivity Standards 77 OTHER SERVICES OF THE NATIONAL

Alpha-particle standards BUREAU OF STANDARDS 93

Beta-particle and gamma-ray gas Calibration and Related Measurement

standards Services 93

Alpha-particle, beta-particle, gamma-ray, Standards Information Service 95 and electron-capture solution Standard Reference Data 95

standards Technical Information and Publications 95 Contemporary standard for carbon- 14 dating laboratories GUIDE FOR REQUESTING THE

Environmental standards DEVELOPMENT OF STANDARD

Low energy photon sources REFERENCE MATERIALS 96 Gamma-ray "point-source" standards Radium gamma-ray solution standards CERTIFIED REFERENCE MATERIALS

Radium solution standards for radon FROM OTHER SOURCES 97

analysis INDICES 99

Radioactivity standard reference Alphabetical Index 99

materials currently not in stock Numerical Index to SRM Certificates 106

viii
National Bureau of Standards

Catalog of Standard Reference Materials - 1981-83

This Catalog lists those Standard Reference Materials (SRM's), Research Materials (RM's), and Special Reference Materials (GM's) that are available from the National Bureau of Standards (NBS), and those

that are soon to be available. The Catalog describes these materials as to their certified characterization,

unit size, and type, as well as providing ordering information. Prices for these materials are listed separately in annual supplements to this Catalog. Key words: Analysis; characterization; composition; properties; Standard Reference Materials; Research

Materials; materials.

Introduction

The National Bureau of Standards issues over 1000

different materials through its Standard Reference

Materials Program. These materials are primarily Standard Reference Materials (SRM's) certified for

their chemical composition, chemical property, or

physical property, but also include Research Materials (RM's) and Special Reference Materials (GM's). All SRM's, RM's, and GM's bear distin- guishing names and numbers by which they are permanently identified. Thus, each SRM, RM, or GM bearing a given description is identical (within

the required or intended limits) to every other sample bearing the same designation—with the ex- ception of individually certified items, which are

further identified by serial number. The first materials issued by NBS were called Standard Samples and consisted of a group of ores,

irons, and steels certified for their chemical composition. Since the mid-1960's these materials have been

issued as Standard Reference Materials, and cover a wide range of chemical and physical properties and ah

equally wide range of measurement interests.

Definitions The different terms, SRM, RM, or GM, are used

to indicate differences in the types of information

supplied and in the purposes for which the material is intended. Standard Reference Materials have been characterized by the National Bureau of Standards for some

chemical or physical property and are issued with a

Certificate that gives the results of the charaterization. These results are obtained by one of the three established routes of certification, i.e., measurement of the

property using: (1) a previously validated reference method, (2) two or more independent, reliable measurement methods, or (3) an ad hoc network of cooperating laboratories, technically competent and

thoroughly knowledgeable with the material being

tested. These routes are described in detail in, "The

Role of Standard Reference Materials in Measure- ment Systems," NBS Monograph 148, 54 pages (Jan.

1975). SRM's are defined as being well-characterized and certified materials produced in quantity to im- prove measurement science. They are prepared and

used for three main purposes: to help develop accurate methods of analysis (reference methods); to calibrate measurements systems used to: (a)facilitate the exchange of goods, (b) institute quality control,

(c) determine performance characteristics, or (d) measure some property at the limit of the state-of-theart; to assure the long-term adequacy and integrity of

quality control processes. In these ways, SRM's

help ensure the compatibility and accuracy of measurements in many facets of national life

from science and technology to trade and commerce.

Research Materials, unlike SRM's, are not certified. Instead of a Certificate, RM's are issued with a "Report of Investigation," the sole authority of which

is the NBS staff member who authored the report. An RM is intended primarily to further scientific or

technical research on that particular material. The

principal consideration in issuing an RM is to provide

a homogeneous material so that investigators in different laboratories are assured that they are investi- gating the same material. Special Reference Materials differ from both SRM's

and RM's in that NBS does not participate in the

1
characterization of these materials. GM's are refer- ence materials produced and certified or guaranteed by other government agencies, standards bodies, or other non-profit organizations. When deemed to be in the public interest and when alternate methods of

national distribution do not exist, NBS acts as the

distributor for such materials. This service is available

to all organizations that qualify and have reference materials that would help solve a national measure- ment problem. SRM Catalog New Catalogs of NBS Standard Reference Materials are published approximately every 3 years,

listing new materials available, materials in preparation, and deleting discontinued materials. To keep the Catalog current between editions, annual supple- ments are published that list: the current prices charged, new materials, discontinued materials (with suggested substitutes), and revised Certificates. The materials listed in this Catalog are separated

into several major groups: Chemical Composition

Standards, Physical Property Standards, Engineering Type Standards, Research Materials, and Special Reference Materials. The first three groups include SRM's only and are subdivided into the categories shown in the Table of Contents. The numerical values given in the Catalog to describe the materials' properties are nominal values only and are to be used only as guides in selecting the

materials. They are not to be used in lieu of the

Certificate issued with the material. Note: Some SRM's are not issued with Certificates. These exceptions are noted in both the SRM

description and the numerical index. The numerical index provides the SRM, RM, and GM numbers of all materials listed in the Catalog,

together with either the date of the current Certificate or a note to explain the absence of a Certificate. An alphabetical index is also provided. For the most part, this index lists SRM catagories and the primary constituent or element of an SRM, rather than the names of specific SRM's. RM's and GM's are

listed as groups only. Preparation and Availability of Standard Reference Materials New and renewal SRM's are being prepared continually. When completed, prospective users are notified directly of their availability, and the SRM's

are described in the next catalog supplement.

In preparing renewal SRM's, the intention is to complete the renewal before the supply of the existing

SRM is exhausted. Frequently, this is not possible and the SRM will be out-of-stock for a time. When

this occurs, those ordering the material are so notified and, when feasible, of possible substitutes. (See Ordering below). When the renewal becomes available, customers who have requested either the previous

lot or the renewal are promptly notified. Renewal SRM's will not usually be identical to

their predecessors, but will be quite similar especially with regard to the characteristics certified. Generally,

the renewal can be used in place of its predecessor. As

an example, when the first 0.1 percent carbon Besse- mer steel was prepared in 1909, it was called Standard Sample No. 8. During the following years, a number

of renewals, 8a, 8b, etc., were prepared. The current SRM 8j, Bessemer Steel (Simulated), 0.1% Carbon,

represents the 10th renewal batch of this material. While each of these batches differs somewhat in detailed analysis, all have had the relatively high level of phosphorus, sulfur, and nitrogen, and low alloy metal content characteristic of this type of material.

It is not possible to supply preceding numbers of a renewal series when the stock is exhausted. If little demand exists or an alternate source of supply be- comes available for a material, production may be

discontinued permanently. Ordering

Orders should be addressed to: Office of Standard Reference Materials Room B311, Chemistry Building National Bureau of Standards Washington, DC 20234 Telephone (301) 921-2045 Orders should give the amount (number of units), catalog number, and name of the material requested. For example: 1 each, No. llh, Basic-Open-Hearth

Steel, 0.2 percent C. The materials described in this Catalog are distributed in the units listed or in multiples thereof only. Acceptance of an order does not imply acceptance

of any provision set forth in the order contrary to the

policy, practice, or regulations of the National Bureau

of Standards or the U.S. Government.

Orders received for "out-of-stock" materials are cancelled if only out-of-stock items are ordered. On

other orders, shipment is made of available materials and out-of-stock items are cancelled. Backorders are not accepted for out-of-stock materials; if a renewal lot of material is available, it will be furnished

automatically.

2
Terms

Prices quoted are in U.S. dollars, and are published in the SRM Price List (Supplement to this Catalog). New SRM Price Lists, when issued, are sent

to users who have made purchases during the preceeding 12 months and to persons or organizations who have requested them. These prices are subject to

revision without notice and orders will be billed for

the prices in effect at the time of shipment. No

discounts are given on purchases of SRM's, RM's, or GM's.

Remittances of the purchase price need not accompany purchase orders. Payment of invoices is ex- pected within 30 days of receipt of an invoice. Pay- ment on foreign orders may be made by any of the

following:

(a) UNESCO coupons.

(b) banker's draft against a U.S.A. bank,

(c) bank to bank transfer to a U.S.A. bank,

(d) letter of credit on a U.S.A. bank, or

(e) by International Money Order. Pro-forma invoice service will frequently require 6

to 8 weeks to process, and will be furnished only to those requiring such service. Letters of Credit may be used as advance payment

for SRM's. Letters of credit will be accepted from

banks in the United States only. Listed below are the only documents that we will furnish:

(1) Six Commercial Invoices

(2) Packing List

(3) Certificate of Origin

(4) Airway Bill (This can only be furnished if material is shipped collect; if shipped prepaid

International Air Parcel Post, receipts cannot

be furnished.)

If, however, the purchaser requests a different mode of shipment, the shipment will be sent collect. For items

shipped collect NBS cannot "prepay and add" such

shipping charges to the invoice. Restricted categories such as hydrocarbons, organic sulfur compounds,

compressed gases, rubber, rubber compounding materials, radioactive standards, and similar materials are shipped FOB Gaithersburg, MD.

Domestic Shipments

Shipments of material (except for certain restricted categories) intended for the United States, Mexico, and Canada are normally shipped prepaid (providing

that the parcel does not exceed the weight limitations

as prescribed by Postal Laws and Regulations). Foreign Shipments

The regulations of various nations covering the importation of SRM's, GM's, and RM's differ widely; any attempt to list all possible variations would be

impractical. Therefore, where the shipping practices outlined below do not apply, purchasers will be in- formed of the best method of shipment for their countries.Most orders will be shipped by prepaid International Air Parcel Post. Exceptions are items in res- tricted categories and those shipments that exceed

parcel post weight limitations. These exceptions will be shipped FOB Gaithersburg, MD , unless an agent

(shipping or brokerage firm) located in the United

States is required. Where an agent is required, the purchaser will be so notified and will be requested

to designate an agent of his/her choice. In this case, the material will be packaged for overseas shipment and will be forwarded to the agent FOB

Gaithersburg, MD.

NOTE: Orders and inquiries submitted in English will be processed more rapidly than those requiring translations.

.3
National Bureau of Standards

Catalogo de Materiales Patrones

de Referencia del ano 1981-83

En este catalogo figuran todos los Materiales Patrones de Referencia (SRM's), Materiales de

Investigacion (RM's) y Materiales Especiales de Referencia (GM's) que pueden ser obtenidos en el National Bureau of Standards (NBS) en la actualidad y aquellos que estaran disponibles en breve plazo. Estos materiales estan descritos en el catalogo en la misma forma que en el certificado haciendo referencia

al tamano, clase, y caracteristicas asi como informacion para hacer los pedidos. Los precios figuran por separado en un suplemento anual de este catalogo. Palabras Oaves: Analisis; certificacion; caracterizacion; composicion; propiedades; Materiales de

Investigacion (RM's); Materiales Especiales de Referencia (GM's) y Materiales Patrones de Referencia (SRM's).

Introduction NBS emite mas de 1000 materiales diferentes a

traves de su programa para SRM's. Estos materiales son principalmente SRM's que han sido certificados por su composicion quimica y propiedades quimicas y

fiscas pero tembien incluye RM's y GM's. Todos los SRM's, RM's y GM's llevan nombres y numeros que

los identifican permanentemente. Cada SRM, RM o GM al cual se la ha dado una description determin- ada es identica a todas las otras muestras que llevan la misma designation (dentro de los Hmites requeridos para su uso) con exception de aquellas que han sido

certificadas individualmente y a las cuales se les asigna un numero de serie. Los primeros materiales emitidos por el N.B.S.

fueron Uamados "muestras patrones" (standard samples) y consistian en un grupo de minerales,

hierros y aceros que habian sido certificados por su composicion quimica, pero a partir del ano de 1960 se

les disigno con el nombre de Materiales Patrones de

Referencia (SRM's) que cubre un campo mas amplio

de propiedades fisicas y quimicas y que refleja el interes por las medidas.

Definiciones Los terminos SRM, RM, y GM son usados para

indicar las diferentes clases de informacion suministrada y el proposito al cual el material ha sido desti- nado.

Materials Patrones de Referencia: N.B.S. ha caracte- rizado los SRM's por algunas de sus propiedades

fisicas y quimicas y los emite con un certificado en el cual aparece el resultado de dicha caracterizacion.

Estos resultados son obtenidos por una de las tres vias de certificacion establecidas. Medida de la propiedad

usando:

(1) Un metodo de referencia con validez probada

previamente.

(2) Dos o mas metodos independientes de medidas

dignos de confianza.

(3) Una red de cooperativas de laboratorios tecni- camente competentes y con conocimiento ca- bal del material comprobado para este especifico proposito. Estas vias han sido descritas detalladamente en "La

Funcion de los Materiales Patrones de Referencia en

el Sistema de Medidas" (The Role of Standard Reference Materials in Measurement Systems, NBS Monograph 148, 54 pages, Jan. 1975). Se ha definido los SRM's como materiales que se han certificado y analizado en cantidades suficientes para ser usados en

el mejoramiento de las ciencias de las medidas. Los SRM's han sido preparados y usados con tres princi- pales propositos: para ayudar a desarrollar metodos

de analisis de alta calidad (Metodos de Referencia); para calibrar sistemas de medidas destinados a: (a)

facilitar el intercambio de mercancias; (b) implantar

control de la calidad, (c) determinar las caracteristicas representadas y (d) llevar la medida de algunas pro- piedades al limite de la Obra de Arte; y para asegurar un metodo de control de la calidad adecuado, dura- dero e integro. En esta forma los SRM's auydan a asegurar la compatibilidad y alta calidad de las medidas en muchos aspectos de la vida nacional desde

la ciencia y la tecnologia hasta los oficios y el comercio.

4
Materiales de Investigation (RM's): A diferencia de

los SRM's, estos no estan certificados. En lugar de un

certificado, ellos son emitidos con un informe de

investigation (Report of Investigation) el cual es responsabilidad del miembro del cuerpo de cientificos del NBS que produce el informe. RM's estan destina- dos principalmente a fomentar la investigation cientifica y tecnica sobre determinado material con la principal concideracion de proveer un material homogeneo a los cientificos en los diferentes laboratorios, con la seguridad de que estan investigando el mismo

material. Los Materiales Especiales de Referenda (GM's)

se distinguen de los SRM's y de los RM's en que el N.B.S. no participa en su investigation. Los GM's

son materiales de referencia producidos y certifi- cados por otras agendas del gobierno, otros grupos

de patrones de referencia o algunas organizaciones no lucrativas. N.B.S. actua como el distribuidor de dichos materiales cuando considera que es del

interes publico o cuando no hay otro medio

mejor para la distribution nacional. Este servicio esta

al alcance de las organizaciones que llenen los requisitos requeridos y tengan materiales de referencia que

pudieran ayudar a resolver un problema nacional de medida.

Catalogo de Materiales Patrones de Referencia

El Programa de los SRM's del N.B.S. publica nuevos catalogos cada 3 anos en los cuales se registran

los nuevos materiales disponibles, materiales en pre- paration y materiales que han sido descontinuados. Para mantener el catalogo al corriente entre edicio- nes se publica un suplemento con la lista de los precios actuales, nuevos materiales, materiales des- continuados (con algunas sugerencias de sustitutos) y

certificados revisados. Los materiales que figuran en el catalogo han sido

clasificados en varios grandes grupos: Patrones de Composition Quimica, Patrones de Propiedades Fisi- cas, Patrones de Tipo de Ingenieria y Patrones Generales. Los 3 primeros tipos incluyen solamente SRM's

y estan divididos en diferentes sub-grupos que apare- cen en el Indice General. Los valores numericos ofrecidos en el catalogo que

describen las propiedades de los materiales son valores nominales para ser usados solamente como guias

al seleccionar los materiales. Estos valores numericos no deben ser usados en lugar del certificado emitido con el material.

Nota: Algunos SRM's no son emitidos con certifi- cados. Estas excepciones aparecen en la description de SRM's y en el indice numerico.

El indice numerico ofrece numeros para todos los materiales que aparecen en el catalogo junto con la fecha vigente o en su lugar una nota explicando la ausencia del certificado. Un indice alfabetico es ofrecido donde se enumera

los SRM's y el componente o elemento principal en

lugar del nombre del SRM's en cuestion. Los SRM's

y GM's aparecen en grupos solamente.

Preparacidn Y Disponibilidad de los Materiales Patrones de Referencia. Continuamente se estan renovando y preparando

nuevos SRM's. Cuando estan disponibles se notifica a

los interesados y se describen en el proximo suple- mento del catalogo. La renovation de los SRM's tiene como finalidad asegurar la existencia de los materiales antes que se agoten sus reservas. Algunas veces esto no es posible y algunos materiales estan fuera del mercado por un

tiempo. Cuando esto ocurre se le notifica a aquellos que han encargado el material informandoles cuando

podran ser obtenidos o la posibilidad de sustitutos. Cuando el material renovado vuelve a estar disponible se le notifica a los clientes que lo habian solicitado previamente (vea pedidos). Por lo general el material de renovation no sera identico a su predecesor pero

sera bastante similar en especial a lo que a sus caracteres certificados se refiere. En general el material renovado puede ser usado en lugar de su predecesor. Por ejemplo cuando el primer acero Bessemer con 0.1 por ciento de Carbono fue preparado en el ano 1909 fue designado como "Standard Sample No.

8". Durante los anos subsiguientes fueron preparados

lotes de renovacion 8a, 8b etc. En la actualidad esta disponible el SRM 8j que representa la decima reno- vation del acero Bessemer con 0.1 por ciento de Carbono. Si bien cada uno de estos lotes difiere en

algo en cuanto al analisis detallado entre uno otro

lote, todos tienen el nivel relativamente alto de conte- nido de fosforo, azufre, nitrogeno y metal de baja

aleacion que es caractenstica de este material. Una vez agotadas las existencias no es posible suministrar numeros precedentes de una serie de

renovaciones. Si existe poca demanda o se dispone de

otra fuente de suministro de determinado material, la production puede ser descontinuada en forma permanente.

5
Pedidos

Los pedidos deberan ser hechos a la siguiente

direction. Office of Standard Reference Materials Room B311, Chemistry Building National Bureau of Standards Washington, D.C. 20234

Telefono (301) 921-2045 En los pedidos se debera indicar la cantidad (Nii- mero de unidades), el numero del catalogo y el nombre del material ordenado. Por ejemplo: una

muestra, No. llh, Basic-open-Hearth Steel, 0.2 por

ciento C. Estos materiales son distribuidos solamente

en las medidas que figuran en la lista. La aceptacion

de un pedido no implica la aceptacion de ninguna

estipulacion que vaya en contra de la politica, practica o regulaciones del N.B.S. o del Gobierno de los E.U. Pedidos que se reciban de materiales "agotados"

son cancelados, si se ha pedido solamente materiales agotados. Si el pedido incluye otros materiales disponibles se envian estos y se cancelan los materiales agotados. No se aceptan pedidos de materiales agotados. Si un lote de material de renovation esta desponible sera suministrado automaticamente. Los precios estan fijados en moneda de los E.U. y son publicados en la lista de precios de los SRM's

(suplemento del catalogo). Cuando las nuevas listas de precios son emitidas se les envian a los clientes que han hecho compras en el curso de los ultimos doce

meses y a las personas y organizaciones que las soliciten. Estos precios estan sujetos a revisiones sin previa

notification y los pedidos se enviaran con los precios que esten vigentes en el momento del despacho de la mercancia. Las ordenes de compra no necesitan ir acompanadas del valor de la compra. Se espera que las facturas sean pagadas dentro de los treinta dias despues de

recibidas. El pago de pedidos desde el extrajero se puede hacer mediante cualquiera de las siguientes

vias:a) Cupones de la Unesco

b) Giro bancario contra un banco en los E.U.

c) Transferencia bancaria

d) Carta de Credito en un banco de los E.U.

(ver nota)

e) Giro International. Suele requirir ocho semanas procesar facturas pro- forma y seran suministradas solamente a aquellos que

requieran tal servicio. Nota: Se puede emplear cartas de credito para pagar por adelantado los SRM's. Se aceptaran unicamente cartas de credito de bancos en los E.U. A

continuation se indican los unicos documentos que

seran suministrados.

1) Seis facturas comerciales.

2) Lista de embalaje.

3) Certificado de origen.

4) Factura de embarque aereo (solamente si el flete se remite a ser pagado). No se suministrara

recibo cuando la mercancia es enviada por el Servicio Postal Aereo Internacional (Porte pagado). Envlos Dom6sticos

Los envios de materiales (a exception de ciertas categorias restringidas) destinados a los E. U. y Canada por lo general son remesados con importe pagado (siempre cuando el paquete no exceda las limitaciones prescritas por las leyes y el reglamento

postal). Sin embargo, si el comprador solicita una

forma diferente de envio, la mercancia se enviara con

flete por pagar. N.B.S. no Paga Por Tales Fletes. Algunas categorias restringidas como hidrocarburos, compuestos organicos de azufre, gases comprimidos,

materiales para compuestos de goma, muestras ra- dioactivas y materiales semejantes seran enviados

desde Gaithersburg, MD. por expreso con flete por

pagar. Envios al extranjero Las regulaciones que cubren la importation de SRM's, GM's y RM's de algunos paises difieren grandemente. Hacer una lista de estas diferencias no

tiene objeto por lo tanto los compradores deberan

nformarse de cual es el mejor metodo de envio

existente en sus paises cuando la siguiente lista de

practicas no es aplicable. La mayoria de los pedidos con flete pagado seran enviados por Encomienda Postal Internacional Aerea. Son excepciones los articulos en categorias

restringidas y aquellos que excedan las limitaciones de

peso establecidas por la oficina postal de paquetes.

Estas excepciones seran enviadas por expreso con

flete por cobrar a menos que un agente (empresa de

transporte o corredor) ubicado en los E.U. sea requerido. Si es necesario hacer el envio a traves de un

agente se notificara al comprador para que escoja al agente que desee. En este caso el material sera embalado para embarque maritimo y despachado por

expreso con flete por cobrar a la empresa en las E.U. que ha sido designada como agente. Nota: Pedidos y consultas presentados en idioma

ingles seran tramitados en forma mas rapida que

aquellos que requieran traduction.

6
National Bureau of Standards (NBS)

Catalogue des Materiaux Standard de Reference

1981-83

Ce catalogue repertorie les materiaux standard de reference (Standard Reference Materials, SRM's),

les materiaux de recherches (Research Materials, RM's) et les materiaux speciaux de references (Special Reference Materials, GM's) disponibles au Bureau National des Standards (National Bureau of Standards, NBS) et ceux qui seront bientot disponibles. Pour chacun de ces materiaux, le catalogue donne les caracteristiques certifiees, la description de Pechantillon (dimensions, forme), et fournit des renseignements commerciaux. Les prix sont portes separement dans des supplements annuels a ce catalogue.

Mots-cles: Analyse; certification; caracterisation; composition; proprietes; Research Materials; Special Reference Materials; Standard Reference Materials.

Introduction Le Bureau National des Standards (National Bureau of Standards, NBS)* delivre plus de 1000 materiaux differents grace a son programme de Materiaux

Standard de Reference (Standard Reference Materials, SRM's)*. Ces materiaux sont principalement

des SRM's certifies pour leur composition chimique,

leur propriete chimique ou leur propriete physique, mais comprennent egalement des materiaux de re- cherche (Research Materials, RM's)* et des materiaux specials de references (Special References Materials, GM's).* Tous les SRM's, RM's et GM's portent

des noms et des numeros distinctifs qui permettent de

les identifier en permanence. Ainsi, chaque SRM,

RM, ou GM designe par une description donnee est identique (dans les limites specifiees ou visees) a tous

les autres echantillons de meme designation, a l'excep- tion des articles certifies isolement, qui sont identifies en plus par un numero de serie. *Nota: Ces expressions ou les abreviations correspondentes seront utilisees par la suite dans ce document.

Les premiers materiaux delivres par le NBS portaient le nom d'echantillon standard (Standard Samples) et comprenaient un groupe de minerais, de fers,

et d'aciers, certifies pour leur composition chimique. Depuis le milieu des annees 60, ces materiaux ont ete delivres sous la forme de "Standard Reference Materials" et couvrent une large gamme de proprietes physiques et chimiques, et une gamme tout aussi large de domaines d'interet.

Definitions

L'emploi des differents termes SRM, RM, ou GM,

est destine a differencier les types d'informations

fournies et les utilisations auxquelles est destine le materiau. Standard Reference Materials. lis sont caracterises par le NBS pour une propriete physique ou chimique donnee et sont delivres avec un Certificat donnant les resultats de la caracterisation. Ces resultats sont obtenus par l'une des trois procedures de certification,

c'est-a-dire de mesure de la propriete, suivantes: (1) par une methode de reference precedemment reconnue, (2) par deux ou plusieurs methodes de mesures

differentes et fiables, ou (3) par un reseau ad hoc de

laboratoires participants, ayant la competence techni- que et la connaissance du materiau a caracteriser. Ces

procedures sont decrites en detail dans "The Role of Standard Reference Material Measurement Systems" NBS Special Publication 148 (1975). Les SRM's sont

definis comme des materiaux caracterises avec soin et certifies, produits en quantite, afin d'ameliorer la science des mesures. lis sont elbores et utilizes pour

repondre a trois objectifs principaux: Aider a deve- lopper des methodes d'analyses de justesse (methodes

de reference); Etalonner des appareillages de mesures

pour: (a) faciliter les echanges de produits, (b) insti- tuer les controles de qualite, (c) evaluer des perfor- mances, ou (d) mesurer une propriete donnee au mieux des connaissances actuelles; Assurer a long terme la validite et l'integrite des processus de

controle de qualite. Sous tous ces aspects, les SRM's

permettent d'assurer la coherence et la justesse des mesures, dans de nombreuses facettes de la vie natio- nal - depuis la science et la technologie jusqu'aux echanges commerciaux.

Research Materials. Contrairement aux SRM's, ils ne

sont pas certifies. Au lieu d'un Certificat, ces RM's

sont delivres avec un "Rapport d'Essais", sous la seule autorite de l'experimentateur du NBS auteur du

7
rapport. Un RM est essentiellement destine a permettre la poursuite de recherches scientifiques ou techni- ques sur ce materiau. Pour un RM, le souci majeur est de fournir un materiau homogene, afin que les cher- cheurs de differents laboratoires soient assures de

travailler sur le meme materiau.

Special Reference Materials. lis different a la fois des SRM's et des RM's par le fait que NBS ne participe pas a leur caracterisation. Les GM's sont des materiaux de reference produits et certifies ou garantis par

d'autres agences gouvernementales, des organismes de

normalisation ou d'autres organisations a but non

lucratif. S'il apparait qu'ils correspondent a un interet general et s'il n'existe pas d'autres circuits nationaux

de distribution, le NBS fait office de distributeur pour

ces materiaux. Ce service est ouvert a toute organisation qui qualifie, et qui dispose de materiaux de

reference pouvant permettre de resoudre un probleme

de mesure au niveau national.

Catalogue des SRM's

La publication d'un nouveau catalogue des Stan- dard Reference Materials du NBS intervient environ

tous les trois ans. II repertorie les nouveaux materiaux

disponibles, les materiaux en preparation, et sup- prime les materiaux epuises. Entre les publications, la mise a jour du catalogue est assuree par des supple- ments annuels, qui repertorient: les prix en vigueur,

les nouveaux materiaux, les materiaux epuises (et proposent des materiaux de remplacement), et les revisions apportees aux Certificats. Les materiaux repertories dans ce catalogue sont

separes en plusieurs grandes classifications: References de composition chimique (Chemical Composition Standards), References de propriete physiques

(Physical Property Standards), References a caractere technologique (Engineering Type Standards), "Research Materials", et "Special Reference Materials". Les trois premieres classifications correspondent aux seuls SRM's, et sont subdivisees en diverses categories indiquees a la table de matieres. Les valeurs numeriques donnees dans le catalogue pour decrire les proprietes des materiaux ne sont que

de valeurs nominates, a utiliser a titre indicatif pour

choisir les materiaux. Elles ne doivent pas etre utili- sees en lieu et place du Certificate delivre avec le materiau.

Nota: Certains SRM's sont delivres sans Certificat. Ces exceptions sont precisees a la fois dans la description du SRM et a l'index numerique correspondant.

L'index numerique donne les numeros de SRM,

RM et GM de tous les materiaux repertories dans le catalogue, ainsi que, soit la date du dernier Certificat,

soit une Nota expliquant l'absence de certificat. II existe egalement un index alphabetique. Cet index

repertorie principalement les categories de SRM et l'element ou la matrice de base, plutot que sa denomination precise. Les RM's et les GM's sont regroupes uniquement en grandes rubriques.

Preparation et Disponibilite des Standard Reference Materials La preparation de nouveaux SRM's et le renouvel- lement d'anciens sont effectues continuellement. Au

terme de ces operations, les utilisateurs potentiels sont

avertis de leur disponibilite, et le SRM est decrit dans

le supplement au catalogue suivant.

L'objectif, pour les SRM's de renouvellement, est d'assurer une releve avant que le stock du SRM

existant ne soit epuise. Frequemment, cette condition ne peut etre remplie, et, pour un temps, le SRM se trouve en rupture de stock. Quand cela se produit, les demandeurs en sont informes. Eventuellement, ils sont aussi informes de l'existance d'un materiau de remplacement. (voir ci-apres "Commandes"). Des que

le lot de renouvellement est disponible, les clients ayant demande soit le lot anterieur, soit le nouveau,

sont rapidement avertis. Les SRM's de renouvellement ne sont ordinaire- ment pas identiques aux precedents, mais presentent une grande similitude, en particulier quant aux caracteristiques certifiees. En regie generate, le lot de renouvellement peut etre utilize a la place du precedent. Par exemple, quant le premier acier Bessemer a

0,1 % de carbone a ete prepare en 1909, il a ete designe sous le nom de "Standard Sample No. 8". Les annees

suivantes, on a prepare un certain nombre de lots de

renouvellement, 8a, 8b, etc. . . L'actuel SRM 8j, Bessemer Steel (simule) a 0,1 % de carbone, represente le dixieme lot de renouvellement de ce materiau. Alors que ces lots different quelque peu dans l'analyse

detaillee des teneurs, par contre, ils contiennent tous

des teneurs relativement elevees en phosphore, soufre

et azote, et un faible taux de metaux allies caracteristi- que de ce type de materiau. Une fois le stock epuise, il devient impossible de

fournir les numeros anterieurs a une serie de renouvellement. Si la demande pour un materiau est moindre, ou bien si une source equivalente divient disponible,

sa production petit etre definitivement interrompue.

8
Commandes

Les commandes doivent etre adressees a: Office of Standard Reference Materials Room B311, Chemistry Building National Bureau of Standards Washington, D.C. 20234

Telephone: (301) 921-2045

Les commandes doivent mentionner la quantite (nombre d'unites), la reference figurant au catalogue

et le nom du materiau demande. Par exemple:

1 each, No. 1 lh, Basic-Open-Hearth Steel, 0,2 % C. Les materiaux decrits dans le catalogue sont distri- bues seulement dans la quantite unitaire precisee ou

des multiples de celle-ci. L'acceptation d'une commande n'implique pas

l'acceptation de quelque condition qui serait contraire aux principes, pratiques ou reglementations du National Bureau of Standards ou du Gouvernement des

Etats-Unis. Les commandes recues pour des materiaux "en

rupture de stock" sont annulees quant elles ne portent que sur des articles epuises. Pour les autres commandes l'expedition des materiaux disponibles est effectuee, et les commandes d'articles epuises sont

annulees. Les rappels de commande ne sont pas

acceptes pour les materiaux de rupture de stock. Si un

lot de renouvellement du materiau est disponible, il sera automatiquement fourni. Les prix mentionnes sont en dollars U.S. et sont

publies dans le tarif joint a ce catalogue. Quand de nouveaux tarifs sont appliques, ils sont envoyes aux

utilisateurs qui ont effectue des achats dans les douze

mois precedents, et aux personnes ou organisations

qui en font la demande. Ces prix sont sujets a revision sans avis prealable, et les commandes sont facturees aux prix en vigueur a la date d'expedition. II n'est consenti aucune remise sur l'achat de SRM's, RM's, ou GM's.

II n'est pas necessaire de joindre a une commande

ferme le montant du reglement correspondant a

l'achat. Les factures doivent etre reglees dans un delai de 30 jours a compter du recu de la facture. Le

paiement des commandes en provenance de l'etranger doit etre effectue en dollars U.S., selon l'une des modalites suivantes:

a) Coupons UNESCO

b) Tirage d'un effet sur une banque des Etats-Unis.

c) Transfert bancaire a une banque des Etats- Unis.

d) Lettre de credit sur une banque des Etats-Unis

(voir ci-apres). e) Mandat international. La fourniture de factures pro-forma demande un

delai de 6 a 8 semaines; ce service n'est assure que sur demande.

Nota: Les lettres de credit peuvent etre utilisees pour payer a l'avance des SRM's. Elles seront acceptees seulement en provenance d'une banque des Etats- Unis. Ci-dessous sont enumeres les seuls documents

qui pourront etre fournis:

1) Six factures commerciales.

2) Liste des colis

3) Certificat d'origine

4) Taxe de transport aeriene (document qui ne peut etre fourni que si l'acheteur paye les frais de transport; s'il est expedie affranchi en paquet

poste aerien international, ce type de regu ne pourra etre fourni).

Expeditions: Regime interieur L'expedition de materiaux (sauf pour certains types de materiaux reglementes) a destination des

Etats-Unis et du Canada est effectuee au taux d'af- franchissement normal (a condition que le paquet ne depasse pas le poids limite autorise par les lois et reglements postaux). Cependant, si l'acheteur de- mande un autre mode d'expedition, elle sera effectuee au compte de l'acheteur. Pour les produits expedies

ainsi, le NBS ne peut payer les taxes de port et les ajouter ensuite a la facture. Les types de materiaux

reglementes, tels que hydrocarbures, composes

organo-soufres, gaz comprimes, caoutchoucs, materiaux a base caoutchouc, sources radioactives etalons,

et autres materiaux similaires, sont expedies franco a bord (FOB) de Gaithersburg, Md.

Expeditions: Regime international

Les reglementations de nombreux pays pour l'im- portation de SRM's, RM's et GM's comportent de

grandes differences; toute tentative d'enumerer toutes

les possibilites s'avererait impossible. Aussi, quand les modes d'expedition dont nous donnons un apercu ci- dessous ne sont pas applicables, les acheteurs sont informes du mode d'expedition adequat vers leur pays.La plupart des commandes sont expediees affranchies en paquet poste aerien international, exceptions

faites des types de materiaux reglementes et des envois excedant le poids limite postal autorize. Les envois se

9
rapportant a ces exceptions seront expedies FOB

Gaithersburg, Md, amoins qu'il ne soit necessaire

d'avoir recours a un agent etabli aux Etats-Unis

(firme de courtage, d'import-export). Dans ce dernier

cas, l'acheteur en est averti et devra designer un agent de son choix. Le materiau sera alors conditionne pour

etre expedie outre-mer et sera envoye a l'agent FOB

Gaithersburg, Md.

Nota: Les commandes ou demandes de renseigne- ments ecrites en anglais seront plus vite traitees que

celles necessitant une traduction.

National Bureau of Standards

Katalog fUr Bezugs-Standards verschiedener Materialien, Ausgabe 1981-83

In diesem Katalog sind alle vom National Bureau of Standards sofort oder in nachster Zeit lieferbaren Bezugs-Standard Materialien (Standard Reference Materials, SRM's), Versuchs-Materialien (Research

Materials, RM's) und Spezial-Materialien (Special Reference Materials, GM's) aufgefiihrt. Sie werden im

einzelnen hinsichtlich ihrer garantierten Eigenschaften, der Menge pro Einheit und des Typs beschrieben. Ausserdem werden Hinweise fur die Aufgabe von Bestellungen gegeben. Die Preise sind in getrennt zu diesem Katalog erscheinenden Erganzungslisten enthalten, die jahrlich neu herausgegeben werden.

Stichworte: Analysis (Analyse) —Certification (Attest) —Characterization (Kennzeihnung) —

Composition (Zusammensetzung) —Research Materials (Versuch-Materials) — Special Reference Materials

(Spezial-Materials) —Standards Reference Materials (Standards Bezugs Materials)

Eir Das Bezugs-Standaids-Programm des National Bureau of Standards umfasst iiber 1000 verschiedene

Materialien. In der Hauptsache sind es StandardMaterialien (SRM's) deren chemische Zusammensetzung, sowie chemische oder physikalische Eigen- schaften bescheinigt werden. Aber auch

Versuch-Materialien (RM's) und SpezialMaterialien (GM's) gehoren dazu. Alle SRM's, RM's und GM's tragen kennzeichenende Namen und Nummern, mit denen sie jederzeit identifizierbar sind. Somit ist jedes mit einer bestimmten Bezeichnung

versehenes SRM, RM oder GM in den geforderten oder vorgesehenen Grenzen mit jeder anderen Probe

gleicher Bezeichnung identisch, ausgenommen indivi- dual garantiere Materialien, die zudem durch eine Seriennummer unterschieden werden. Die ersten vom National Bureau of Standard

gelieferten Materialien hiessen Standard-Proben und

bestanden aus einer Gruppe von Erzen, Eisenwerkstoffen und Stahlen, deren chemische Zusammensetzung bescheinigt wurde. Seit Mitte der 60er Jahre werden diese Materialien als Bezugs-Standard- Proben geliefert und umfassen ein breites Spektrum

chemischer und physikalischer Eigenschaften sowie

einen ebenso weiten Bereich von Messwerten.

Definitionen Die Bezeichnungen "SRM", "RM" oder "GM"

kennzeichnen die Unterschiede beziiglich der mit den

einzelnen Proben verbundenen Art der Information und Anwendungsmdglichkeiten.

Standard- Materialien (SRM) werden vom National Bureau of Standards durch bestimmte chemische oder

physikalische Eigenschaften gekennzeichnet und mit einem Zertifikat geliefert, in dem die kennzeich- nenden Daten aufgefiihrt sind. Diese Daten werden

iiber einen von drei fur die Kennzeichnung festge- legten Wegen ermittelt, und zwar durch Messung der Eigenschaften mittels:

1. eines zuvor bestatigten Referenz-Verfahrens;

2. zweier oder mehrerer voneinander unabhangiger Messmethoden;

3. einer ad hoc Gruppe kooperierender Laboratories die technisch dazu in der Lage sind und

grundliche Kenntnisse iiber das zu unterzu- chende Material besitzen. Diese Wege werden im einzelnen in "The Role of Standard Reference Materials in Measurement Sys10
terns" NBS Special Publication 148 (1975) beschrieben. Standard-Materialien (SRM's) werden als genau gekennzeichnete und garantierte Materialien

definiert, die zur Verbesserung der Messtechnik in entsprechenden Mengen hergestellt werden. Drei Hauptzwecke sind es, ftir die sie hergestellt und

eingesetzt werden: —Die Entwicklung genauer Analysenmethoden

(Referenz-Methoden) zu unterstiitzen. —Zur Eichung von Mess-systemen, die dazu dienen

a) den Warenaustausch zu erleichtern,

b) die Grundlage fur eine Qualitatskontrolle zu

bilden,

c) Leistungsfahigkeit, Wirkingsweise oder Gebrauchswert festzulegen, oder

d) bestimmte Eigenschaften an der Grenze des Entwicklungsstandes zu messen. —Zur langfristigen Sicherung der Angemessenheit und Integritat von Qualitats-Priifverfahren.

Damit tragen die SRM's dazu bei, die Vergleichbarkeit und Genauigheit von Messungen unter den ver- schiedensten Aspekten des taglichen Lebens—von der Wissenschaft und Technologie bis zu Handel und

Wirtschaft—sicherzustellen.

Versuch- Materialien (RM). Anders als bei den SRM's

werden hierfiir keine Zertifikate erstellt. An deren

Stelle tritt ein "Report of Investigation" (Untersuchungsbericht), der unter der ausschliesslichen Ve- rantwortung des ihn erstellenden Mitgliedes des National Bureau of Standards steht. Ein RM soli in erster Linie der Unterstiitzung der wissenschaftlichen oder technischen Forschung fur dieses Material

dienen. Hauptgrund fur die Ausgabe eines RM ist die Lieferung eines homogenen Materials, das den

Forschern in den verschiedenen Laboratorien die Gewahr daftir geben soli, dass sie auch dasselbe Material untersuchen.

Spezial- Materialien (GM). Diese unterscheiden sich von den SRM's und RM's dadurch dass das National Bureau of Standards bei der Festlegung der Kennzei- chen fur dieses Material nicht mitwirkt. GM's sind Bezungs-Materialien, die von anderen Regierungsstellen, Normen-Ausschussen oder anderen gemeinnutzigen Organisationen hergestellt, beglaubigt oder

garantiert werden. Wenn ein offentliches Interesse an

diesen Materialien besteht oder wenn keine entspre- chenden Wege der Verteilung im Lande gegeben sind, ubernimmt das National Bureau of Standards deren

Vertrieb. Dieser Service ist alien Organisation zuganglich, die entsprechend qualifiziert sind und im

Besitz von Referenz-Materialien sind, die dazu bei- tragen konnten, ein nationales Messproblem zu

losen.

SRM-Katalog

Das National Bureau of Standards veroffentlicht etwa alle drei Jahre neue Kataloge mit den von ihm

erhaltlichen Standard-Bezugs-Materialien, in denen

neue zur Verfiigung stehende Materialien sowie

solche, die sich in Vorbereitung befinden, aufgefiihrt sind und auch Angaben iiber nicht weiter lieferbare Proben enthalten sind. Um aber auch in der Zwischenzeit den Katalog auf dem laufenden zu halten, werden alljahrlich Erganzungen herausgegeben. Sie enthalten die jeweils giiltigen Preise, neue Materialien, ausgelaufene Materialien (ggf. mit Ersatzvorschlagen) und revidierte Zertifikate. Die in diesem Katalog aufgefiihrten Materialien

sind in verschieden Hauptgruppen unterteilt: Chemical Composition Standards (Standards fur die che- mische Zusammensetzung), Physical Property Standards (Standards ftir physikalische Eigenschaften), Engineering Type Standards (Technische Standards), Research Materials (Versuchs-Materialien) und Special Reference Materials (Spezial-Materialien). Die

ersten drei Gruppen umfassen ausschliesslich SRM's

und sind in die im Inhaltsverzeichnis aufgefiihrten Kategorien unterteilt. Die zur Beschreibung der Material-Eigenschaften im Katalog angegebenen Zahlenwerte sind lediglich Richtwerte und dienen nur als Hinweis bei der Auswahl der Materialien. Sie diirfen nicht anstelle des ftir das Material ausgegebenen Zertifikats verwendet

werden. Anmerkung: Einige SRM's werden ohne Zertifikat

geliefert. Diese Ausnahmen sind sowohl in der SRMBeschreibung als auch im Zahlen-Index entsprechend

gekennzeichnet. Der Zahlenindex enthalt die SRM-, RM- und GMNummern aller im Katalog aufgefiihrten Materialien sowie das Datum des zur Zeit giiltigen Zertifi- kats beziehungsweise eine Begriindung, weshalb ein solches nicht vorhanden ist. Daneben gibt es einen alphabetischen Index. Zum

grossten Teil enthalt dieser Index die SRM-Gruppen

und den Hauptbestandteil oder das Hauptelement des SRM oder zumindest den Namen spezifischer SRM's. RM's und GM's sind lediglich als Gruppen aufgefiihrt.

11
Auftragserteilung

Auftrage sind zu richten an

Office of Standard Reference Materials Room B311, Chemistry Building National Bureau of Standards Washington, D.C. 20234 Telephon (301) 921-2045 Die Auftrage mtissen enthalten: die gewiinschte Menge (Anzahl der Proben), Katalog-Nummer und

Bezeichnung des gewiinschten Materials. Beispiel: Je

eine Nr. llh, basischer Siemens-Martin-Stahl, 0,2%

C. Die im Katalog beschriebenen Materialien werden

in den angegebenen Mengen oder entsprechenden

Vielfachen davon geliefert. Die Annahme eines Auftrages ist nicht gleichbe- deutend mit der Anerkennung irgendeiner zusatzlich

in dem Auftrag enthaltenen Vorschrift, die nicht der

Politik, der Praxis oder den Regeln des National Bureau of Standards oder der U.S. Regierung entspricht. Fur nicht mehr am Lager befindliche Materialien eingehende Auftrage werden, wenn darin nur solche Materialien enthalten sind, anulliert. Sind in den

Auftragen auch noch andere Materialien enthalten, werden diese geliefert und nur die nicht am Lager

befindlichen gestrichen. Fur nicht am Lager befindliche Materialien werden auch keine Auftrage zuriickgestellt. Sobald die Neuauflage eines Materials zur Verfiigung steht, wird automatisch dieses geliefert.

Herstellung und Lieferbarkeit von Standard- Bezugs- Materialien Neue oder erneuerte SRM's werden standig hergestellt. Sobald sie bereit stehen, werden interessierte Anwender direkt iiber die Lieferbarkeit unterrichtet, und im folgenden Katalog-Nachtrag erfolgt die Beschreibung des SRM's.

Die Uberlegung beziiglich der Neuauflage von SRM's geht davon aus, deren Herstellung bereits in Angriff zu nehmen, bevor die Liefermoglichkeit des bestehenden SRM's erschopft ist. Manchmal ist dies nicht moglich, und so kann ein SRM voniber- gehend vergriffen sein. Wenn dies der Fall ist, werden

Besteller dieses Materials dariiber informiert und,

soweit moglich, auf entsprechenden Ersatz hingewiesen. (Siehe auch unter "Auftragserteilung".) Sobald die Neuauflage zur Verfiigung steht, werden

alle Kunden, die einen Auftrag auf das friihere oder

das neuaufgelegte Material erteilt hatten, sofort benachrichtigt.

Neuaufgelegte SRM's sind gewohnlich mit ihren Vorgangern nicht identisch, doch sind sie hinsichtlich der spezifizierten Eigenschaften genau so hervorragend. Grundsatzlich kann die Neuauflage anstelle

ihres Vorgangers Verwendung finden. Beispiel: Als dererste 0,1 %ige Bessemer-Kohlestahl im Jahre 1909

hergestellt wurde, erhielt er die Bezeichnung "Standard-Probe Nr. 8". Im Verlauf der folgenden

Jahre wurden mehrere Neuauflagen unter der Be- zeichnung 8a, 8b usw., hergestellt. Die zur Zeit gel- tende Nummer ftir diesen Bessemer-Stahl ist SRM 8j und stellt die zehnte Neuauflage dieses Materials dar. Obwohl jede dieser neuaufgelegten Serien in der genauen Analyses von den anderen etwas abweicht, weisen jedoch alle den relativ hohen Anteil an Phosphor, Schwefel und Stickstoff und einen geringen Gehalt an Legierungsmetall auf, was ftir diese Art von

Material charakteristisch ist. Wenn das Lager geraumt ist, ist es nicht mehr

moglich, vorangegangene Nummern eines neuaufgelegten Materials zu liefern. Besteht nur ein geringer Bedarf oder ist ftir ein bestimmtes Material eine andere Lieferquelle vorhanden, kann die Produktion

durch das National Bureau of Standards fur immer

eingestellt werden. Die Priese sind in U.S.-Dollar festgelegt und in der diesem Katalog beigefiigten SRM-Preisliste enthalten. Neue SRM-Preislisten werden nach Erschei- nen alien Kunden, die in den vorangegangenen 12 Monaten kaufe getatigt haben, sowie Personen

oder Organisationen, die danach verlangt haben, zugestellt. Die Preise sind unverbindlich und konnen

ohne diesbeziigliche Nachricht Anderungen unterliegen. Bei Auftragen werden stets die im Augenblick der Lieferung giiltigen Preise in Rechnung

gestellt. Auf SRM's, RM's und GM's werden keinerlei Abziige gewahrt. Vorauszahlung bei Auftragserteilung ist nicht not- wendig. Ftir die Begleichung einer Rechnung werden

30 Tage Ziel nach Erhalt gewahrt. Die Begleichung

auslandischer Auftrage muss in U.S.-Dollar erfolgen. Dies kann in folgender Weise geschehen:

a) mit UNESCO-Kupons,

b) durch Scheck einer U. S. Bank,

c) durch Bank-zu-Bank-Uberweisung auf eine U. S. Bank,

d) durch Kreditbrief auf eine U. S. Bank (siehe unten) oder

e) durch internationale Postanweisung. Die Ausstellung von proforma-Rechnungen erfordert gewohnlich 6 bis 8 Wochen und wird deshalb nur auf Wunsch vorgenommen.

12
Anmerkung: Fur die Vorauszahlung konnen Kreditbriefe verwendet werden. Sie werden nur von Banken in den Vereinigten Staaten angenommen.

Folgende Begleitdokumente werden den Sendungen beigefiigt:

1. Sechs Waren-Rechnungen

2. Packzettel

3. Ursprungs-Zertifikat

4. Luftfracht-Rechnung (Sie wird nur ausgestellt, wenn das Material gegen Nachnahme versandt

wird. Erfolgt der Versand portofrei mit der inter- national Luftpaketpost, konnen keine Empfangsbestatigungen gegeben werden.)

Inland-Versand Nach den USA und Canada erfolgt der Versand

(einige beschrankte Gruppen ausgenommen) normalerweise portofrei, vorausgesetzt dass das Gewicht des Pakets nicht die postalisch vorgeschriebenen Gewichtsgrenzen iiberschreitet. Verlangt der Kaufer

jedoch eine andere Versandart, so erfolgt die Liefe- rung gegen Nachnahme. Bei Nachnahmesendungen

kann das National Bureau of Standards nicht die Portokosten usw. auf der Rechnung vermerken. Bes- timmte Gruppen wie Kohlenwaseerstoffe, organische Schwefelverbindungen, komprimierte Gase, Gummi,

Gummi-Zusatz-Materialien, radioaktive Standards und ahnliche Materialien werden fob Gaithersburg, Md. (USA) zum Versand gebracht.

Versand ins Ausland

Die Einfuhr-Vorschriften fur SRM's, RM's und GM's sind fur die einzelnen Lander sehr unterschiedlich. Es ware zwecklos, alle moglichen Abweichungen

hier zusammenzustellen. Deshalb werden die Kaufer

iiberall dort, wo die nachfolgenden Versandpraktiken

nicht anwendbar sind, iiber die fur ihr Land beste Versandform informiert. Die meisten Auftrage werden portofrei mit der

internationalen Luftpaketpost versandt. Ausgenom- men sind Proben der beschrankten Gruppen und

Sendungen, die das fur Fuslpakete zulassige Gewicht

iiberschreiten. In diesen Fallen erfolgt der Versand

fob Gaithersburg, Md. (USA), es sei denn, ein Vertreter (Transport-oder Makler-Firma) mit sitz in den USA gewtinscht wird. Wenn dies der Fall ist, wird

der Kaufer entsprechend unterrichtet und aufgefordert, einen Vertreter seiner Wahl zu benennen. In diesem Falle wird das Material fur den Ubersee- Versand verpackt und dem Vertreter fob Gaithersburg, Md. (USA) zugestellt. Anmerkung: Auftrage und Anfragen in englischer Sprache werden schneller abgewickelt als solche, die

erst einer Ubersetzung bediirfen.

13
1906 "Catalog"

SAMPLES OF STANDARDIZED IRON AND STEEL

BUREAU OF STANDARDS

Maal]ington

Bureau Circular No. I I February 1, 1906. Under the provisions of the act of Congress establishing the Bureau of Standards, the Bureau is authorized, among other things, to determine "physical constants and the properties of materials, when such data are of great importance to scientific or manufacturing

interests." DESCRIPTION OF SAMPLES. For several years the American Foundrymen's Association has prepared and distributed samples of standardized irons. By an agreement with that association the samples which

have been prepared under its direction have been transferred to the Bureau of Standards, and this Bureau will, in the future, have charge of the preparation and distribution of such samples, and will also, as soon as practicable, undertake the preparation and dis- tribution of samples of standardized steels. The samples now ready for distribution are

as follows

:

Sample A {iron). —The analysis of this sample gives total carbon, graphite, and combined carbon. The sample has been ground to pass a 40-mesh sieve to secure greater homogeneity.

Sample B {iron). —The analysis of Sample B gives total carbon, graphite, and combined

carbon, phosphorus (by three methods), silicon, titanium, total siilphur and sulphur by

evolution as- hydrogen sulphide, manganese, and copper. The silicon and manganese in

this iron are low, and the phosphorus is within the Bessemer limit. Sample C {iron). —The analysis of Sample C gives the same determinations as in Sample

B, with the exception of copper. The silicon, phosphorus, and manganese in the iron are medium.

Sample D {iron). —The analysis of Sample D gives the same determinations as in Sample C. The silicon, phosphorus, and manganese in the iron are high.

Sample 0.5 {steel). —At present only a single sample of steel has been prepared. This is designated Sample 0.5. The analysis of this sample gives total carbon, silicon, total siilphur and sulphur by evolution as hydrogen sulphide, phosphorus (by two methods), and manganese. The sample is an open-hearth steel of about 0.5 per cent carbon, is almost

free from silicon, and is low in sulphur. As the sample is not as homogeneous as is desirable, determinations of its carbon and manganese in different parts of the ingot, as well as the average, are given. A better sample will be obtained as soon as possible. METHODS OF ANALYSIS. Five independent analyses, made by different individuals, are given for Samples B, C, and D, and three independent analyses for the sample of steel. The methods of analysis used at the Bureau of Standards were, in brief outline, as follows

:

Total carbon. —Two grams of the iron were dissolved in 100 cc of a solution of copper potassium chloride containing 300 grams of the salt and 100 cc of concentrated hydrochloric acid per liter. The solution was stirred by a mechanical stirrer. When solution was complete, 5 per cent more of concentrated hydrochloric acid was added and the carbon

filtered off on a platinum boat, washed with water and dilute hydrochloric acid, dried

11-1325 14
1906 "Catalog

at 100° and burned in a current of oxygen in a porcelain tube, using a ten-burner combustion furnace. Graphite. —Two grams of iron were dissolved in dilute nitric acid (sp. gr. 1.20), iising 35 cc and heating very gently. The residue was filtered off on a platinum boat, washed

out with hot water, then with a hot solution of potassium hydroxide (sp. gr. 1.10), followed by dilute hydrochloric acid and finally by hot water. After drying at 100°, the graphite was burned in the same manner as the total carbon. Combined carbon. —This was obtained by subtracting graphitic carbon from total carbon.

Silicon. —Two grams of, iron were dissolved in 30 cc of nitric acid (sp. gr. 1.20) and

the solution evaporated to dryness and baked on a hot plate until the ferric nitrate was

decomposed. The dish was then cooled and 30 cc of strong hydrochloric acid added to dissolve the ferric oxide. When solution was complete, the acid was evaporated and the

residue again baked on the hot plate. Thirty cubic centimeters of strong hydrochloric

acid were added and the dish heated until all iron had gone into solution, when hot water was added and the residue filtered off and washed with hot water and dilute hydrochloric

acid. The filter and contents were then placed in a platinum crucible and the filter paper and graphite burned off and the residue strongly ignited over the blast. After weighing,

the silica was volatilized with hydrofluoric acid with the addition of a little sulphuric acid, and the residue ignited. The difference between the two weights was called "silica," and

the silicon calculated therefrom. Titanium. —Titanium was determined by treating 5 grams of iron with 40 cc of hydrochloric acid (1 : 1) and heating until all iron had gone into solution. Dissolving in

this manner it was found that all but a negligible quantity of titanium remained in the

insoluble residue. The filtrate was tested for titanium by extracting the iron with ether

after oxidation with a small amount of nitric acid, using the method of Rothe (Stahl und

Eisen, 12, 1052 (1892), and 13, 333 (1893),) and adding hydrogen peroxide to the extracted

solution, after expelling the ether and oxidizing with nitric acid. In all cases only a faint coloration was obtained. The insoluble residue was filtered off and washed with hot water, and the filter paper and carbonaceous matter were burned. The residue in the crucible was treated with hydrofluoric acid and a little sulphuric acid, and all silicon volatilized. The residue was fused with sodium carbonate, treated with water and acidified with

sulphuric acid. A sufficient amount of ferric alum was added to the standard titanium

solution to give the same tint as the sample when they were at the same dilution, for it was found that the residue from the silica always contained a little iron along with the

titanium. Hydrogen peroxide was added to the solution and standard and the comparison

made in a Wolff colorimeter.

Pliosjyiiorus. —Two grams of iron were dissolved in nitric acid (sp. gr. 1.133) and boiled

until yellow fumes no longer came off. Ten cubic centimeters of a permanganate solution

(15 grams to 1 liter) were added, and the boiling continued. Sodium sulphite solution was

added to dissolve the oxide of manganese, and the solution again boiled and filtered. After

cooling, 40 cc of ammonia (sp. gr. 0.90) were added, the solution agitated, and when the temperature was at 40°, 40 cc of molybdate solution (prepared according to Blair's "Chemical Analysis of Iron," 5th ed., p. 97) were added and the solution shaken vigorously for five minutes. After settling out, the yellow precipitate was filtered off and washed with acid ammonium sulphate (prepared according to Blair) until the washings

did not react for iron or molybdic acid. The precipitate was treated on the filter with

25 cc of ammonia (5 cc of ammonia sp. gr. 0.90 to 20 cc of water). The filter was

washed out with water and 10 cc of strong sulphuric acid added to the filtrate, which was then run through the reauctor and titrated against a permanganate solution contain- ing about 2 grams to the liter. A blank was always run with the reductor before each

15
1906 "Catalog"

titration, using the same quantities of ammonia and sulphuric acid. The insoluble residue was always tested for phosphorus.

Sulphur, gravimetric. —Five grains of iron were dissolved in a 400 cc Erlenmeyer

flask, using 50 cc of strong nitric acid. A little sodium carbonate was then added, the

solution evaporated to dryness, and the residuo baked for an hour on the hot plate. The

residue was dissolved in 30 cc of strong hydrochloric acid and the solution again evaporated to dryness and baked. Thirty cubic centimeters of strong hydrochloric acid were

then added, and, after the iron had dissolved, the solution was evaporated to sirupy consist- ency and from 2 to 4 cc of strong hydrochloric acid added. When all iron was in solution, between 30 and 40 cc of hot water were added, and the solution was filtered and the residue washed with hot water. The sulphur was precipitated in the cold solution with 10 cc

of a 10 per cent solution of barium chloride. The precipitate was filtered off after standing

for twenty-four hours. The insoluble residue was ignited, fused with sodium carbonate and nitrate, extracted with water, acidified with hydrochloric acid, evaporated to dryness, extracted with water and a few drops of hydrochloric acid, and the solution precipitated with barium chloride, the sulphur obtained in this way being added to that from the main

filtrate. All evaporations were carried on over electrically heated hot plates to avoid sulphur from gas flames, and careful blank determinations were made with all reagents. Sulphur evolved as hydrogen sulphide. —Five grams of iron were dissolved in 60 cc of hydrochloric acid (1 : 1) in the usual evolution apparatus, the air of which had been

previously displaced by hydrogen. The hydrogen sulphide evolved was absorbed in a solu- tion of sodium hydroxide (sp. gr. 1.1). The solutions in the absorbing vessels were poured

into a beaker and diluted to about 500 cc, acidified with hydrochloric acid, a little potas- sium iodide added, and titrated with a standard iodine solution, using freshly prepared

starch solution as an indicator. Blanks were always made. The iodine solution was

standardized against anhydrous sodium thiosulphate (prepared according to Young, J. Am.

Chem. Soc, 26, 1028 (1904).) Manganese. —Two grams of iron were dissolved in 30 cc of nitric acid (sp. gr. 1.20), and after filtration the solution was evaporated to about 15 cc. Two grams of potassium

chlorate were added and the boiling continued for fifteen minutes; 10 cc more of strong

nitric acid were then added, with 1 gram of potassium chlorate, and the solution boiled ten minutes longer. The precipitated manganese was filtered on asbestos, washed with strong

nitric acid till free from iron, and then washed with water till free from acid. The asbestos pad holding the manganese was transferred to a flask and shaken up with 25 cc of a solu- tion of ammonium ferrous sulphate containing 5 per cent sulphuric acid, and when solution

of the manganese was completed the excess of ferrous iron was determined by titration with

a permanganate solution. Manganese was also determined as follows : Two grams of iron were dissolved in 30 cc

of nitric acid (sp. gr. 1.20). When solution was complete, the solution was nearly neutralized with sodium carbonate, and zinc oxide emulsion added. After standing a few

minutes, an excess of zinc oxide was added, and the solution made up to a definite volume

and one-half or three-fifths filtered off through a dry filter and diluted to about 200 cc. To

this were added 20 cc of sodium acetate solution (30 grams crystalized sodium acetate, 30 cc of 30 per cent acetic acid, 170 cc of water) and 40 cc of bromine water. The solution was warmed gently until all manganese had separated. The precipitate was filtered, washed, dissolved, and titrated as before. Copper. —Ten grams of iron were treated with 10 per cent sulphuric acid. All the copper was found in the insoluble residue. This was digested with aqua regia, and excess

of ammonia added. The solution was filtered and compared with a standard copper solu- tion treated with the same excess of ammonia. 11—1925

16
1906 "Catalog

The methods used by the other analysts were as follows: Booth, Garrett, and Blair used the acetate method for gravimetric phosphorus ; Bamber's fusion method for gravi- metric sulphur; also an evolution method, absorbing hydrogen sulphide in an alkaline

solution of a lead salt, with fusion of the residue; the nitric acid and potassium chlorate

separation, with weighing as manganese pyrophosphate, for manganese, and Drown's method for silicon. Andrew S. McGreath used for silicon both Drown's method and the method of fusion of the residue from the nitric acid solution for phosphorus with sodium carbonate, evaporating

the solution of the fusion with hydrochloric acid. He determined sulphur by solution in

nitric acid, conversion of this to a chloride solution and precipitation by barium chloride

in a small volume. For phosphorus both the acetate and molybdate methods were used, and for manganese the chlorate method. Cremer and Bicknell used the molybdate separation for phosphorus, weighing as pyrophosphate; oxidation with nitrohydrochloric and precipitation in the ferric chloride

solution for sulphur, and the acetate separation and weighing as Mn3 04 for manganese.

Albert W. Smith used the molybdate separation for phosphorus, weighing as magnesium pyrophosphate; oxidation with nitrohydrochloric acid and precipitation in the

ferric chloride solution for sulphur; the acetate separation and weighing as manganese

pyrophosphate for manganese, and Drown's method for silicon. In all cases the total carbon was determined by solution in copper-potassium chloride

solution and combustion of the residue, and the graphite by solution in dilute acid and

combustion. USB OF THE SAMPLES.

Great pains have been taken to make the contents of all the bottles uniform, and the agreement of the analyses indicates that these efforts have been successful. In shipping,

however, the fine and coarse particles in the bottles become segregated so that it is of the greatest importance that the contents of each bottle be thoroughly mixed again before any is used for analysis. Each bottle will be labeled with its letter only, but gummed labels containing the average of the analyses by the different chemists will be furnished with

each sample, and also certificates giving the complete analysis of each chemist, as it is believed that many will desire to know how close an agreement has been secured in these

analyses. FEES. The following schedule of fees has been adopted for samples of the same or different irons or steels

:

Schedule 101.

Samples of Standardized Iron and Steel. (a) Single samples, of 150 grams, each - . - $2. 00

(b) Three to nine samples, each _ 1.67

(c) Ten to nineteen samples, each 1.50

(d) Twenty samples or more, each 1 . 25 Orders for samples should be accompanied by a remittance, which may be by check,

draft, or post-office order, and should be made payable to the Bureau of Standards.

S. W. Stratton,

Director. Approved

:

V. H. Metcalf,

Secretary. n~1925

17
CERTIFIED CHEMICAL COMPOSITION STANDARDS

Steels (Chip Form) These SRM's were prepared for the steel industry primarily for use with methods involving sample

solutions in checking chemical methods of analysis for both production control and customer acceptance. These SRM's consist of nominal composition steel alloys selected to provide a wide range of analytical values for various elements of vital concern to the chemist. They are furnished in 150-gram units (unless otherwise noted) as chips usually sized between 0.4 to 1.2 mm, prepared from selected portions of commercial ingots.

Plain Carbon Steels

Type

Chemical Composition (Nominal Weight Percent)

Grav Comb

Bessemer (simulated), 0.1C BOH, 0.2C BOH, 0.4C BOH, 0.6C BOH, 0.8C BOH, 0.1C BOH, 1.1C AOH, 0.2C AISI 1045 BOH, 0.5C (Tin bearing) Basic Oxygen 0.4C BOH, 0.1C (Carbon only) 300 g BOH, 1.1C (Carbon only) 300 g AISI 12110.081 .200

.407

.61

.753 .094

1.09 0.223

.462

.395

.092

1.07 0.089

0.505

.510

.842

.85

.404

.485

.381 .554

.665

.717 .824

0.095

.010

.018 .006

.008

.005 .028 .046

.012

.012

.012

0.077 0.058

.026 .21, .027 .235

.031 .355 .039 .177 .026 .095 .029 .202 .033 .186

.028 .305

.030 .202 .014 .163

.132

SRM Cu Ni Cr V Mo Co Ti Sn

Al

(total) N Other

8jllh

12h 13g

14e 15g

16e 19g 20g

152a

178 335 337

368

0.020

.061 .073 .066

.072

.036

.052

.093 .034

.023

.032

0.113

.028

.032

.061

.053 .017

.072

.066 .034

.056

.010

0.047

.025 .074 .050

.071 .028 .118 .374

.036

.046

.016

0.015

.001 .003

.001

.002

.001 .002

.012

.002

.001 .001

0.038 0.004

.006 (0.038)

,048 .060

0.006

.013

.013

.008

.036

.003

0.012 .027 0.008 .031 .040 Nb 0.026

.032

.010 .008 .030 .001 .003 .010

18
Low Alloy Steels

Type

Chemical Composition (Nominal Weight Percent)

(Other Forms) Gray Comb

Cr-V (SAE 6150) Ni-Cr (SAE 3140) Ni-Mo (SAE 4820) Cr2-Mol Cr-Mo (SAE X4130) IN PREP.

0.490

.409

.173 .114

0.79

.798 .537 .404

0.011

.008 .006

.007

0.022

.010

0.009

.021 .011 .019

0.243

.278

.253 .258

Manganese (SAE T1340)

High-Sulfur 0.2C (Carbon

only). Cr-Mo-Al (Nitralloy G)

High-Silicon High-Sulfur Low Carbon-Silicon (lOOg) Cr-Ni-Mo (AISI 8640) Cr0.5-W0.5

High-Silicon Cr-Mo (ASTM A213).. Cr-Ni-Mo (AISI 8620).. AISI 4340 AISI 94B17 (Mod) Cr-V(Mod)

High Carbon (Mod)

661,1095,1261 662,1096,1262

663,1097,1263 664,1098,1264

.397

.193

.326

.028

.125 .0029

.403

.905 .027

.177

.222

.383 .160

.62 .87

0.506

.278

.769

.008 .029

.076

.778

1.24 0.094

.55„ .960 .66 1.04 1.50 0.255

.015 .006

.014

.041 .029 .on

.028

(.60)

.017

.008

.245 .020

.019

.011 .026

.020

.022

.015

.038 .009

.029

.274

2.89 0.020

.242

.322 3.19

0.23„

.30„ .222

.39 .74

.065

0.074

.127

.123 .179

.117

.071 .013

.083 .056

.047 .032

.042

.50

.10

.24*

0.070

1.19 3.58 0.203

.217

.038

.251

.510

.100

.050

.065

.48. 2.00

0.59

.30

.14*

Cr V Mo W Co Ti As Sn Al

(total) Nb Ta Zr N

0.95

.678

.143 2.18

0.18

.002

.002 .004

0.010

0.009

(.011) 0.023

.246

.996

(0.011)

0.063 .003 .237 .004

1.18 0.019

.014

.488

.485

.022

1.33 0.51o

.003 .199

.008

.002

.182

.039 .014

.53s .204

1.07 .003 0.329

.012 .004

.014 <.01

.007 0.517

.004 .0028

.002 .004 .039

.694 .011 .19 .017 0.032 0.020 0.017 .010 .02, 0.022 0.020 0.009 (.0037)

.30 .040 .068 .20 .30 .084 .092 .016 .095 .29 .20 .19 (.00404)

1.31 .31 .028 .046 .048 .050 .010 .10, .24 .049 (.053) .049 (.0041) 0.063 .105 .49 .10 .15 .24 .05 2 .008 (.008) • 157 .11 .068 (.0032)

SRM B Pb Sb Bi Ag Se Te Ce La Nd

361 0.0003, (45.6) 0.0042 (0.0004) 0.0004 (0.004) (0.0006) 0.0040 (0.001) 0.00075 362 .0025 .0004s .013 (.002) .0011 (.0012) (.0011) .0019 (.001) .0007, 363 .00078 .00186 .002 (.0008) .0037 (.00016) (.0009) .0030 (.002) .0012 364 .0106 .023„ .034 (.0009) (.00002) (.00021) (.0002) .0005, (.0002) .0001,

19
SRM Ca Mg Zn Pr Ge O H Au Hf Sr

361 O.OOOlo 0.00026 (0.0001) (0.0003) [0.006] (0.0009) (<0.0005) (<0. 00005) (0.0002) (< 0.0005) 362 .0002, ,00069 (.0005) (.0003) [.002] (.00107) (<.0005) (<. 00005) (.0003) 363 r mm \.\AAJ\J\J) ( *s fV¥l^) 0005 364 .00003 .00016 [•001] (.0001) [.003] (.0010) (<.0005) .0001 (.0013)

High Alloy Steels

SRM Type

Chemical Composition (Nominal Weight Percent) C Mn P

S

Si Cu

Grav Comb

126c 344

345

348

High-Nickel (36% Ni) 0.026

.69 .048

.044

0.47

.57 .224

1.48

0.004

.018 .018

.015

0.006

.019

.012 .002

0.19

.395 .610

.54

0.040

.106 3.44 0.22

Crl5-Ni7-Mo2-All Crl6-Ni4-Cu3

Ni26-Crl5 (A286)

0.012

SRM Ni Cr V Mo Co Ti Al

(Total) Nb Ta B Fe

126c 344

345

348

36.05

7.28 4.24

25.8

0.064 14.95 16.04

14.54

0.001

.040

.041

.25

0.011

2.40 0.122

1.3

0.008 0.076 1.16 0.002

.089 0.231 2.24 0.23 0.0031 53.3

Stainless Steels

Type

Chemical Composition (Nominal Weight Percent)

(Other Forms) Mn

Grav Comb

Crl3 (SAE 420) Crl7-Nill-Ti0.3 (AISI 321).... CR17-Nill-Nb0.6 (AISI 348).. CR13-Mo0.3-S0.3 Crl9-Nil2-Mo3

1171 1172

Low Carbon (AISI 3162) Carbon Only.

Crl7-Ni9-Se0.2 (SAE 303Se) Cr24-Ni0.3(AISI 446)

0.310

.067 .056

.120

.044 .0078

.052

.093

0.330

1.80

1.7, 1.03 1.64

0.018

.019 .024

.026

.020 0.326

0.036

.013 .014

.330

.018

0.738

.315

20
SRM Ni Cr V Mo Co Ti Nb Ta Pb Se N

73c

121d

123c

133a 160b

166c 339 367

0.246

11.17

11. 3„ 0.241

12.82

17.4a 17.4„ 12.89

0.030 0.091

.165

.22 .294

0 037

0.10

.12 0.3420.65 <0 001

.026 .032 0.001 .03 9

8.89 0.29

17.42 24.19.058

.08 0.248 .096 0.247

.168

Type

Chemical Composition (Nominal Weight Percent)

Grav Comb

W18-Cr4-Vl Mo-W-Cr-V

Mo8-W2-Cr4-Vl

Co8-Mo9-W2-Cr4-V2.

0.342

.34„ .218

.192

0.022

.01 3 .18 .023

0.009

.005

.007 .007

0.311

.18 .323 .270

.101 .094

SRM Ni Cr V Mo W Co Sn As N

50c

132b

134a

153a

0.069

.23 .088

.168

4.13

4.38

3.67

3.72

1.16

1.84

1.25 2.06

0.082

4.93 8.35

8.85

18.44

6.2S 2.00

1.76

0.018 0.022 0.012 0.028

8.47 .024

Steels (Granular Form) These granular-form SRM's are prepared by a pre-alloyed powder metallurgical process, which generally includes argon atomization and hydrogen annealing. The materials normally are sized between 0.07 to

0.7 mm to ensure satisfactory homogeneity and are issued in 100-gram units.

SRM Type

Chemical Composition (Nominal Weight

Percent) C Mn , P s Si Cu Ni

163 Low Alloy, 1.0 Cr 0.933 0.897 0.007 0.027 0.488 0.087 0.081 lOlf Stainless (AISI 304L) .014 .087 .008 .008 .876 .030 9.96

I

21
SRM Cr V Mo W Co N As Sb Ga

163 lOlf 0.982

18.49 0.029.007 0.007 0.034 (0.0002) 0.088 (0.003) (0.0009) (0.004)

Steels (Solid Form)

Several groups of SRM's have been prepared to meet the basic needs of the steel industry for analytical control primarily by optical emission and x-ray spectroscopic methods of analysis. Both nominal composition and analytical range SRM's are provided for ingot iron, low-alloy steel, stainless steel, tool steel, and specialty steel. These SRM's are furnished in various forms. The 400 series is intended for optical emission spectros- copic methods of analysis utilizing the "point-to-point" technique. The 600 series is intended for microchemical methods of analysis such as electron probe microanalysis, spark source mass spectrometric analysis, and laser probe analysis. The 800, 1100, and 1200 series are intended for "point-to-plane" optical emission

spectroscopic methods of analysis. The D800 series, and the 1100 and 1200 series also are intended for x- ray spectroscopic methods of analysis. Because of the special homogeneity requirements, most of these materials have been prepared by using

the most modern techniques of melting, casting, fabrication, and heat treatment to ensure adequate uni- formity of composition. NOTE: Values in parentheses are not certified as they are based on the results from a single laboratory. Values in brackets are not certified but are nominal values obtained from heat analyses. These values are given for additional information on the chemical composition. Nominal Sizes for Solid Steel SRM's

5.5 mm (7/32 in) diameter, 102 mm (4 in) long

3.2 mm (1/8 in) diameter, 51 mm (2 in) long

13 mm (1/2 in) diameter, 51 mm (2 in) long

31 mm (11/4 in) diameter, 6.4 mm (1/4 in) thick

31 mm (11/4 in) diameter, 19 mm (3/4 in) thick

Ingot Iron and Low-Alloy Steels The preparation of these original spectroscopic SRM's began in about 1944 when the cores remaining

after lathe cutting the materials for chip form standards were tested for homogeneity. Those found satisfac- tory were fabricated to the final shapes and sizes. To meet the urgent need in the mid-1950's for calibration standards for x-ray spectroscopic methods of analysis, portions of the material from five of these SRM's

were converted to the applicable disk form. Although entirely satisfactory for conventional spectroscopic methods of analysis, these SRM's generally do not meet the stringent requirements for homogeneity necessary for use with the newer microchemical methods of analysis. These standards will be discontinued when

the supply is exhausted.

400 Series: 600 Series: 800 Series: D800 Series: 1100 and 1200 Series:

22
Type

Chemical Composition (Nominal Weight Percent)

803a

404a 804a 405a 805a 407a 807a 408a 808a 409b 809b

413 414

417a 817a 418a 420a 820a

821 427 827

D803a

D807a

Acid Open Hearth, 0.6C

Basic Electric Medium Manganese Chromium-Vanadium

Chromium-Nickel

Nickel Acid Open Hearth, 0.4C Cr-Mo (SAE 4140)

Basic Open Hearth, 0.4C Cr-Mo (SAE X4130)

Ingot Iron Cr-W, 0.9C Cr-Mo (SAE 4150) (B only)..

1.04 0.88

1.90 0.76

.76 .46

.67

.67

.78

.52 .017

1.24

.27

0.096

.050

.032

.132

.10 .104

.25

.11 .13 .040

.027

0.190

.040

.065 .169

1.20 3.29 0.18

.080

.062

.125 .0092

.10

0.101

.025 0.37

.92 .655 .072

.055

.99 .050

1.02 0.0032

.49

0.005

.002 0.033.007

.005

.065 .009

.006

.32 .013

.21 .0013

.040

.014

.036

Special Ingot Irons and Low-Alloy Steels The planning of the 1100 series SRM's began in late 1952 to meet critical requirements of calibration

in the iron and steel industry. Steel for these SRM's was prepared by the most modern melting, casting, and fabrication techniques to provide large quantities of material of the highest possible homogeneity. The

materials were fully characterized and included investigations by means of electron probe microanalysis and quantitative metallographic techniques. It was concluded that, for example, SRM's 461 and 463 are

sufficiently homogeneous that any present microanalytical technique can be carried out with little chance

of inaccuracy caused by inhomogeneity. Details of the metallographic and homogeneity characterization

are given in NBS Miscellaneous Publication 260-3 and 260-10, respectively (see inside back cover for or- dering instructions). The 1200 series replaces the 1100 series which has been exhausted and consists of four low alloy steels and an electrolytic iron containing a graded series of 40 elements. Material from the same melts are availa- ble in three other forms: chip form, 361-365, for chemical methods of analysis (page 18); rods, 661-665, 3.2 mm (1/8 in) in diameter and 51 mm (2 in) long for microchemical methods of analysis such as electron probe microanalysis, spark source mass spectrometric analysis, and laser probe analysis (see below); and

rods (1095-1099), 6.4 mm (1/4 in) in diameter and 102 mm (4 in) long for determining gases in metals by vacuum fusion and neutron activation methods of analysis (page 41). The preparation of the 1200 series involved a cooperative effort between Industry and NBS, and represents the first application of the "benchmark" concept to SRM's. With thousands of industrial processes requiring analytical control, de- mands for SRM's far exceeded the NBS production capacity. An ever widening gap between supplies and demands led to a program to produce essential "benchmark" SRM's to serve as calibration points in measurement systems. While other selected low-alloy steel SRM's will be prepared to augment the 1200 series, this series is expected to be the primary "benchmarks," especially for some 25 trace elements that affect the physical properites of steels. NOTE: Values in parentheses not certified, based on a single analytical method.

Values in brackets not certified, approximate values from the heat analyses. fFrom Gasometric Certificates: SRM's 1095 through 1099. —Not detected, value given is conservative "Upper Limit" of detection by a specific method of

analysis.

23
Type

Chemical Composition (Nominal Weight Percent) (Other Forms) c Mn P S Si Cu Ni Cr

0.026 0.277 0.028 0.009 2.89 0.070 0.038 0.019

.027 .094 .006 .026 3.19 .056 .050 .022

.11 3 .755 .066 .220 0.018 .014 .27 .014

. 15 .36 .053 (.02) .047 .34 1.73 .13 .40 .94 .045 (.02) .28 .20 0.70 .74 .54 1.32 .017 (.02) .48 .094 • 13 5 .078

.037 0.032 .008 (.01) .029 .019 .026 .004

. 1 1

.012 (.01) .025 .033 .051 .01

.11 .275 .033 (.01) .26 .067 .088 .036

.26 .47 .023 (.02) .075 .26 1.03 .54

(.1) (1.0) (.07) (.3) (.01) (1) (0.05) (.04) .43 0.78 .013 .022 .24 .097 .51 .48

.39i .67 .016 .015 .228 .042 2.00 .693 .16, 1.05 .044 .037 .40 .51 0.60 .30

.626 1.50 .029 .O05 7 .74 .098 .32 1.31 .87 0.258 .010 .025 .067 .250 • 142 0.068 .0067 .0057 .0025 .0055 .008„ .0058 .041 .007 2

1134 High-Silicon.

1135 High-Silicon.

1136 High-Sulfur..

461 462 464

465 466 1166 467

468

1169a

1222

"661 1261a 662 1262a

"663 1263a

"664 1264a

"665 1265a

Low Alloy A

Low Alloy B Low Alloy D

Ingot Iron E

Ingot Iron F Low Alloy G

Low Alloy H

Lead-Bearing Cr-Ni-Mo (AISI 8640)

AISI 4340 AISI 94B17 (Mod)... Cr-V (Mod)

High Carbon (Mod)

Electrolytic Iron

125b

179 129c

139b

361,1095 362,1096

363,1097

364,1098

365,1099 SRM's 661, 662, 663, 664, and 665 are sold in a set only as SRM 668. SRM Pb Ag

461 462 464

465 466 1166 467

468

1169a

1222

*661 1261a *662 1262a

•663 1263a

*664 1264a

*665 1265a

0.0002 ,0005 .005

.000, (,0002 ) (.0002 ) .009

(0.003) .006

.020 (<.0O05)

(.O0U)

.0006 (<.0005)

.29

(0.00U) (<.0002)

(,003 2) (.00025 ) (.00045 ) (.004„) (<.0005)

(0.001s)

(.003„)

(.001 5 ) (.003 5) (.003„)

(.003„) (.001„)

(0.02„) (.006)

(.006) (.003)

(.005) (.004)

(.004)

(0.006 ) (.00s)

(.00,) (.005 ) (.006 ) (.004 ) (.006 )

.0005

.0025

.0009,

.011 .00013

.000025 .00043 .0022

.024 OOOOI5

.0004

.0011

(.0037) (.00002) (.000002)

[.006]

[.002]

[.010] [.003] (-.0014)

(.0009)t (.00107)f (.00066)f

(.0010)t (.0063)f

... (007)

(.O037)f (.00404)t

(.004 l)f (.0032)t (-.0011) *SRM's 661, 662, 663, 664, and 665 are sold in a set only as SRM 668. SRM V Mo W Co Ti As Sn

Al

(Total) Nb Ta Zr

1134

1145 1136

0.008

.014

.002

0.003

.004 0.329 <0.01 .0028

.012 461 .024 .30 0.012 0.26 (0.01) 0.028 .022 .005 0.011 0.002 «0.005) 462 .058 .080 .053 .11 .037 .046 .066 .023 .096 .036 .063 464 •295 .029 .022 .028 .004 .018 .043 .005 .037 .069 .010 465 .002 .005 (.001) .008 .20 .010 .001 .19 (.001) .001 (.002) 466 1166 .007 .011 (.006) .046 .057 .014 .005 .Oh .005 .002 (<-005)

467 .041 .021 .20 .07, .26 .14 .10 .16 .29 .23 .094 468 .17 .20 .077 .16 .011 .008 .009 .042 .006 .005 «.005)

1169a (.001) (.02)

24
SRM V Mo W Co Ti As Sn

Al

(Total) Nb Ta Zr

1222 661 1261a

*662 1262a 663 1263a *664 1264a

*665 1265a

.005

.011

.04,

.31 .106 .0006

.18

.19

.07„ .030

.49 .0050

(.016)

.032

.30 .048

.15 .007„

(.002) .020

.085 .050

.24 .0006

(.038)

.02, .095 .24 (.0080)

(.0007)

(.002)

.022

.30 .049

.157

.017

.20 .046

.102 (.0004)

.017

.095 .010

.052 (.0002)

.010

.016

.10, .008

(.0002)

.021

.21 (.053)

.11 (<.00005)

.009

.20 .050

.069 (<.00001)

SRM Sb Bi Ca Mg Se Te

1222 661 1261a 0.0042 0.0004 0.00002, 0.00018 0.004 0.0006 662 1262a .012 0 (.002) .00014 .00062 (.0012) .0011 *663 1263a .002 (.0008) .00013 .00049 (.00016) .0009 *664 1264a .034 (.0009) .00004 .00015 (.00021) .00018 *665 1265a -(<.00005) -(<.00001) -(<.00001) -(<.00002) -«.00001) -(<.00001)

SRM Zn Au Ce Hf La Nd Pr Fe

•661 1261a (0.0001) (<0.00005) 0.0014 (0.0002) 0.0004 0.0002, (0.00014) (95.6) *662 1262a (.0005) (<.00005) .0015 (.0003) .0004 .0006, (.00012) (95.3) *663 1263a (.0004) .0005 .0014 (.0005) .0006 .0006„ (.00018) (94.4) *664 1264a [.001] .0001 ,00022 (.0013) .00007 .00007 (.00003) (96.7) *665 1265a (<.0001) -(<.000002) -(<.000005) -«.00002) -(<.000005) -(<.000005) -(<.000005) (99.9) SRM's 661, 662, 663, 664, and 665 are sold in a set only as SRM 668.

Stainless Steel Three groups of stainless steel SRM's designed primarily for calibration in spectroscopic methods of

analysis are available. Groups I and II have been extensively tested for homogeneity and found satisfactory for application in conventional spectroscopic methods of analysis. Neither group, however, has been tested for microanalytical methods and their use in these aDDlications is not recommended. Group III are for the "point-to-plane" technique of emission spectoscopy and for x-ray spectroscopy. They were prepared by melting, casting, and fabrication techniques known to produce material of high homogeneity.

(Values in parentheses are not certified, but are given for additional information only.) GROUP I SRM Name

Chemical Composition (Nominal Weight Percent) Mn Si Cu Ni Cr V Mo w Co

442 Crl6-Nil0 2.88 (0.09) 0.11 9.9 16.1 0.032 0.12 (0.08) 0.13 443 Crl8.5-Ni9.5 3.38 (.15) .14 9.4 18.5 .064 .12 (.09) .12 444 Cr20.5-Nil0 4.62 (.65) .24 10.1 20.5 .12 .23 (.17) .22

25
SRM Ti Sn Nb Ta B Pb Zr Zn

442 0.002 0.0035 0.032 (0.0006) 0.0005 0.0017 (0.004) (0.003) 443 .003 .006 .056 (.0008) .0012 .0025 (.005) 444 .019 .014 .20 (.004) .0033 .0037 (Oil) (.004)

GROUP II SRM Name

Chemical Composition (Nominal Weight Percent) Mn Si Cu Ni Cr V

445 Crl3-Mo0.9 (Mod. AISI 410) 0.77 0.52 0.065 0.28 13.31 (0.05) 446 Crl8-Ni9 (Mod. AISI 321) .53 1.19 .19 9.11 18.35 (.03) 447 Cr24-Nil3 (Mod. AISI 309) .23 0.37 .19 13.26 23.72 (.03) 448 Cr9-Mo0.3 (Mod. AISI 403) 2.13 1.25 .16 0.52 9.09 (.02) 449 849 D849 Cr5.5-Ni6.5 1.63 0.68 .21 6.62 5.48 (.01) 450 850 D850 Cr3-Ni25 .12 .36 24.8 2.99 (.006)

SRM Mo W Ti Sn Nb Ta

445 0.92 (0.42) (0.03) 0.11 (0.002) 446 .43 (.04) (.34) (0.02) .60 (.030) 447 .059 (.06) (.02) .03 (.002) 448 .33 (.14) (-23) (-05) .49 (.026) 449 849 D849 .15 (.19) (.11) (.07) .31 (.021) 450 850 D850 (.21) (05) (09) .05 (.002)

GROUP III

SRM Name

Chemical Composition (Nominal Weight Percent) Other Forms C Mn P S Si Cu Ni Cr

1151a C1151

1152a C1152

1153a C1153

1154a C1154

1155 1170b

1171 1172 1267

Cr22-Ni7—IN PREP

Cr22-Ni7 Crl8-Nil0—IN PREP0.039 2.50 0.017 0.38 0.38 0.418 7.29 22.70 Crl8-Nil0 Crl6Ni8—IN PREP

.148 0.96 .021 .0064 .80 .102 10.88 17.81 Crl6-Ni8

Crl9-Nil2—IN PREP

.264 .50 .030 .018 1.07 .23 8.77 16.69 Crl9-Nil2 Crl8-Nil2-Mo2 (AISI 316) Selenium-Bearing

160b

.086

.046

(.052) .067 .056

.093

1.42

1.63 (0.738)

1.8 0 1.7. 0.315

.06 .020

(.129) .018

.025 .018

.053 .018

(.013)

.01 3 .01 4 .015

0.50

.50

(.654)

.54

.59

.58

.40 .169

(.199)

.121 .10 5

12.92

12.18

(8.89)

11.2 11.3s 0.29

19.06

18.45

(17.42)

17.4 17.4o 24.24

Crl7-Nill-Ti0.3 Crl7-Nill-Nb0.6 AISI 446121d

123c 367

26
SRM V Mo Co Ti As Sn Al Nb Ta B Pb Zr

1151a C1151

1152a C1152

1153a C1153

1154a C1154

1155 1170b

1171 1172

1267

0.037 0.80 0.032 0.0039

.030 .43 .22 .0047

.18 .24 .127 .0054

.135 .047

(.058)

.07 2.38

(0.248)

.I65 .22

.38 .101 (.096)

.10

.12

.001 ................... Se 0.23 ;•• .34

.65 <.001

.08 N0.17

Specialty Steels SRM's 1156, Maraging Steel, and 1158, High-Nickel Steel (Invar), are designed primarily for use in optical emission and x-ray spectrometric methods of analysis. SRM 1156 derives its name from the formation of martensite on age hardening. Alloys of this type are used extensively in submarines, missiles, and aircraft. SRM 1158 has good impact toughness down to — 269°C and has an extremely low coefficient of ex- pansion between —253 and 203°C. These properties make this material very useful for cryogenic application. SRM 1158 also serves as a "benchmark" for the production control of ferronickel (40Ni-60Fe) alloys.

Chemical Composition (Nominal Weight SRM Type Percent) C Mn P S Si Cu

1156 Maraging (Ni 19) 0.023 0.21 0.011 0.012 0.184 0.025 1158 High-Nickel (Ni 36) .026 .47 .004 .006 .19 .040

SRM Ni Cr Mo Co Ti Al Zr B Ca V

1156 19.0 0.20 3.1 7.3 0.21 0.047 0.004 0.003 <0.001

1158 36.03 .064 0.011 0.008 0.001

High-Temperature Alloys (Solid Form) High-temperature alloy SRM's were prepared to meet the critical needs of industry, particularly the aerospace industry, and government agencies. These SRM's are useful in instrument calibration, primarily

for x-ray and optical emission spectroscopic methods of analysis.

27
Type

Chemical Composition (Nominal Weight Percent) Mn

1198 Incoloy 901 . 1199 L 605

1200 S 816

1201 HastelloyX.

1206-2 Rene-41

1207- 1 Waspaloy(l)

1207-2 Waspaloy(2)

1208- 1 Inco 718(1).. 1208-2 Inco 718(2)..

(0.048)

(.14) (.40) (.039)

.21, .043

.083

.046 .022

(0.49)

1.42 1.34 0.030

.34

.29, .38 5 .23„

(0.006)

(.005)

(.015)

(.008)

(.004) .005

.005

.003

.003

(0.002)

.006

.009 .009

.01, .007

SRM Ni Cr Mo Co Ti Al Nb Ta Fe W B Zr

1198

1199 1200

1201 1206-2 1207- 1 1207-2 1208- 1 1208-2

40.1

10.2 20.0

45.7

53.3

56.1 55.7

51.9

51.5

12.9

19.9

19.9 20.7

19.7 18.88

19.44 17.5 17.4

6.08 K0.02)

4.0o

9.1, 10.3o 4.50

4.34

3.24 3.13

0.70

51.6 42.0

0.56

11.5 5 13.0s

13.5o 0.82

.76

2.59 (<o.oi)

(.03) «.0f)

2.94 3.09 2.54 0.46 (8S)

0.24 «0.02) «.02)

3.1 8 «.02)

36.2

0.65 3.19 23.2 0.46

2.22

2.09

19.2

19.8

(0.2) 15.4

3.86 (0.15)

(0.0064) (0.014)

1.08

1.74 1.26

1.3, (0.15)

(•85) 5.3 8 4.98 (0.012)(.012)

Tool Steels SRM Type

Chemical Composition (Nominal Weight Percent) Mn Si Cu Cr V Mo W Co

436

437 837 D837

Special (Cr6-Mo3-W10) 0.21 0.32

.53 0.075 6.027.79

0.63 3.04

2.80

1.50

9.7 Special (Cr8-Mo2-W3-Co3) .48 2.8 2.9 438 Mo High Speed (AISI-SAE-M30) .20 .17 .17 4.66 1.17 8.26 1.7 4.9 439 Mo High Speed (AISI-SAE-M36) .18 .21 .12 2.72 1.50 4.61 5.7 7.8 440 840 D840 Special W High Speed (Cr2-W13-Col2) .15 .14 .059 2.12 2.11 0.070 13.0 11.8 441 D841 W High Speed (AISI-SAE-TI) .27 .16 .072 4.20 1.13 .84 18.5

SRM Type C Mn P s Si Cu Ni Cr V Mo W Co

1157 Tool (AISI M2) 0.836 0.34 0.011 0.004 0.18 0.088 0.228 4.36 1.82 4.86 6.28 0.028

28
Steelmaking Alloys These SRM's provide standards of known chemical composition primarily for checking chemical methods of analysis for the major constituents and for selected minor elements covered by ASTM specifi- cations. They are furnished as fine powders (usually <0.1 mm). These SRM's are finding increased use in calibration with instrumental methods of analysis.

Chemical Composition (Nominal Weight Percent) SRM Type Wt/

Unit

(grams) c Mn P S Si Cu Ni

57a

58a

59a

195 64c

196

7190340

68c

Refined Silicon IN PREP

Ferrosilicon (73% Si) Ferrosilicon (50% Si) 75

50

75

100 10060

75 100

100

0.014

.04 .034

4.68 0.035

0.16

.76

.17

.16

.28

0.009

.016 < 0.002 73.2048.2 0.024

.05 .047

.005

0.012

.03 .032

.43 Ferrosilicon (75% Si) Hi-Purity Ferrochromium (HC)

.02 .020 <.002

.067

75.3

1.22 Ferrochromium (LC) 0.38

26.2 Ferroniobium .060

6.72

1.71 80.04

0.035 4.39 Ferromanganese (HC) .19 .008 0.225

SRM Cr V Mo Ti Al Nb Zr Ca Mg Fe B N Co As

57a

58a

59a

195 64c

196

7190

340

68c

0.020

.08 .047 68.00

70.87

(0.002) (0.01) 0.051 0.95

.35

(.05)

0.002 25.22

50.0 23.6 24.98

0.0010 <0.01

0.04 .06

(.01) .037 .001

.02 «.02) <.01.15 .051

.12

0.045

35.3 .06 1.92

.89 57.51 Ta 3.73 0.074 12.3 0.021

Cast Irons (Chip Form)

This group of cast iron SRM's is similar to the chip-form steels and was prepared for use in checking

chemical methods in the cast iron industry. These SRM's are furnished in 150-g units (unless otherwise

noted) and in the form of chips; usually sized between 0.7 to 1.2 mm. They are prepared by lathe cutting of chips with a multiple-tooth cutting tool from thin-wall cylindrical castings especially made for the purpose. Supplied with each SRM is a Certificate of Analysis listing the chemical composition determined at NBS and other laboratories that cooperated in the certification of the SRM's. For SRM 365, Electrolytic

Iron, the Certificate provides information on these additional elements: W, Nb, Ag, Zn, Ge, O, H, Ta, Nd,

Zr, Sb, Bi, Ca, Mg, Se, Te, Ce, La, Pr, Au, Hf, and Fe. (Values in parentheses are not certified, but are given for information only.)

29
Type

Chemical Composition (Nominal Weight Percent)

Graphitic Grav Comb

White (110 g) Cast Cast

Cast

Cast (High Phosphorus)

Cast (Ni-Cr) Cast (Ni-Cr-Mo)

Cast (Cu-Ni-Cr)

Cast (Car Wheel)

Ductile Nodular

Electrolytic Iron

2.54

3.22 2.59

2.85 2.69

2.85 2.75 2.62

3.43

1.81 1.86 0.0068

2.65 1.99 2.01 2.59

2.37

1.87 1.96 2.76

1.23 1.38

0.40

.82 5 .68 1.05 0.612

.745 .510

1.00 0.540

.92 .275 .0056

0.025

.149 .280

.557 0.794

.025 .058 .086

.315 .024

.018 .0025

0.052

.043

.123 .124 0.060

.007

.067

.065 .074

.007 .006 .0056

Al (total) Mg

0.025

.042 .086

.135 .120

1.22 2.12

14.49 0.030

20.32

0.06

.041

0.03

.116

.15 .370

1.98 0.034

.007..

(0.002) .024

.036

.056

.010

.027

.008 .014

.038

(0.007) .040

.020

.035

.012

.002 .750

.050

(.003) .010

(0.003)

(.03) .05 .059

.044

.027 .016 .020

.034

.018 .020 .0006

(.03) <.005

.042

.014

(.0002)

(0.004) (0.004)

(.003)

(.0002) (.0007)

0.068

.069 N .001

Cast Steels, White Cast Irons, Ductile Irons and Blast Furnace Irons (Solid Form) These chill-cast SRM's were prepared for use in analytical control of cast steels and cast irons by

rapid instrumental methods. Although employed in x-ray spectroscopic analysis, they are particularly

useful for calibrating vacuum optical emission spectrometers because they permit the determination of

carbon, phosphorus, and sulfur in addition to the metallic elements. The "benchmark" concept was used in preparing three new white irons (1145, 1146, and 1150) with

compositions tailored to provide low, nominal, and high values for elements normally specified in cast iron

materials, as well as most malleable, ductile, and grey irons. A concentration range for a number of trace elements of interest was provided to enhance the utility of the standards. The planning, preparation, homogeneity testing, and analysis of these SRM's were done through a cooperative Industry-ASTM-NBS pro- gram.These SRM's are chill-cast sections. Details of the preparation and intended use of the SRM's are given in the NBS Miscellaneous Publication 260-1. (See inside back cover for ordering instructions.) (Values in parentheses are not certified, but are given for information only.)

30
SRM Type

Chemical Composition (Nominal Weight Percent) C Mn S Si Cu Cr

1138a Cast Steel (No. 1) 0.1 la 0.35 0.035 0.056 0.25 0.09 0.10 0.13 1139a Cast Steel (No. 2) .790 .92 .012 .013 .80 .47 .98 2.1s 1143a 4.08 .296 .16* .067 1.60 13a .lis 0.1

6

3 1144a Blast Furnace (2) 4.32 1.23 ,084 .083 0.1

8

2 .09, .063 .029 1145 White Cast Iron 2.85 0.040 .24 .21 .29 .52 .59 .67 1146 White Cast Iron 2.01 1.64 .55 .022 3.68 1.49 3.01 2.56 1150 White Cast Iron 3.48 0.81 .063 .070 1.24 0.092 0.074 0.95

SRM V Mo Ti As Al Te Co

1138a

1139a 1143a

1144a

1145 1146 1150

0.020o

.26 .018

.025 .11 .20 .034

0.05

.51 (.004)

(.007)

.48

1.51 0.074

(0.0012)

(.004)

.08, .32 .017

.20 .045

(< 0.005) (<.005)

(.003)

(.004)

(0.067)

(.13) (.008) «.005)

0.01 6 .022 0.058

.13 .014

Nonferrous Alloys (Chip Form) These SRM's provide materials of known composition for checking the performance of chemical methods of analysis and in calibration with instrumental methods. The aluminum-, magnesium-, and zinc- base alloys are furnished as approximately 0.4 to 1.4 mm chips prepared by cutting thin wall castings or wrought bar stock. Certificates of Analysis provided with these standards give the composition as deter- mined at NBS, and most give values obtained by industrial and other outside laboratories cooperating in certification of the standards.

Aluminum-Base Alloys

SRM Type

Chemical Composition (Nominal Weight Percent) Wt/

Unit

(grams) Mn Si Cu Ni Cr V Ti Sn Ga Fe Pb Mg Zn

85b

87a

75

75

0.61

.26 0.186.24

3.99 0.30 0.084

.57 0.211.11 0.006 <.01

0.022

.18 0.019.02 0.24.61 0.021.10

1.49 0.37 0.030

Al-Si 0.05 .16

Copper-Base Alloys SRM's 871, 872, 874, 875, 879, and 880 are fine granules produced by a water atomization technique

for use primarily in checking chemical methods of analysis. The homogeneity of these materials is exceptionally high, and for certain alloys such as SRM 872, Phosphor Bronze (CDA 544) it is the only form that can readily be prepared to exhibit acceptable homogeneity. For many alloys (for which homogeneity re- quirements can be met), both granules (or chips) for chemical analysis and solids for optical emission and

x-ray fluorescence methods, are desirable.

31
Type

Chemical Composition (Nominal Weight Percent) Wt/

Unit

(grams) Cu Ni

Brass, Sheet

Bronze, Silicon Bronze, Leaded Tin

Bronze, Phosphor (CDA 521) Bronze, Phosphor (CDA 544) Cupro-Nickel, 10% (CDA 706) "High-Purity

Cupro-Nickel, 10% (CDA 706) "Doped"

Nickel Silver (CDA 762) Nickel Silver (CDA 770)

69.61 90.93

88.96

91.68

87.36

88.49

87.83

57.75

54.51

0.53

.001 .50

10.18 10.42

12.11 18.13

0.004

1.23 .005 <.001

.003

1.22

1.45 0.00201 .004

27.85

2.08 2.69 0.025

4.0 0.002

.11 30.04

27.3

1.00 0.097

1.44 .010

4.13 < 0.0005

.0092

.002

.002

SRM Mn Sb Sn P Si Al Cd Se

37e

158a

184

871 872 874

875 879 880

1.00 0.96

6.38

1.11 0.026

.009

.082

.26 .002 .0020

3.03 0.46

0.0020 <.0007

<.001

<.001

<0.001 <.0010.007

.009 (0.0006)

(.0008) < 0.0002

.0022 0.00015

.0004

SRM Bi O C H s As Mg Ti

37e

158a

184

871 872 874

875 879 880

< 0.0002

.003

(0.06)

(.14) (0.0028)(.0035) (0.0016)(.004) (0.0011)(.0011) (< 0.0006)(.0010) (0.0002)(.0010) (0.0001) (<.0002)

Copper "Benchmark" Standards The copper "benchmark" standards were prepared in a cooperative Industry-ASTM-NBS program

and were designed primarily for use in calibration with optical emission methods of analysis. They should

also serve in the development of other new or improved trace methods of analysis. Twelve different compositions are to be issued as 25 SRM's. Cu "0" and Cu XI will be issued in chip form only. Cu IV is available only in rod form 6.60 mm in diameter and 103 mm long, but is to be issued later as a water- atomized powder. Cu I, II, III, V, VI, and VII are available both as chips and as rods 6.35 mm in diameter, 103 mm long. Cu VIII, IX, and X will be issued as chill-cast and unidirectionally solidfied blocks 32 mm square and 19 mm thick. Cu VIII-Cu X are phosphorized copper containing a nominal concentration range from about 10 to 500 ppm for the same 20 trace elements contained in the other copper "bench- mark" SRM's, plus 5 to 8 additional elements. These SRM's are applicable for x-ray fluorescence methods

of analysis and, because of deliberate additions of gold and silver (in ratios of 1 to 4), for calibration of fire assay equipment.

32

A
Type

Chemical Composition (Nominal Parts Per Million By Weight) Wt/

Unit

(grams) Unalloyed—Cu "0" IN PREP.. Unalloyed—Cu I Unalloyed—Cu II Unalloyed—Cu III Unalloyed—Cu V

Unalloyed—Cu VI

Unalloyed—Cu VII Unalloyed—Cu XI

4.5

8.0 <1

7.5 30

10224

2.6

1.6 <-2

2547

14046

0.35

.50

.07 2.0

10.5 24.5

19

2.0 6.0

4.3

(0.3)

(.5)

(•5)

0.5

.3.4 2.8 0.5

.6 (4)

14796

143

11.4 20.0

41

(50)

26.5

3.25

0.41

9.9 114

12866

SRM Ni Se Ag S Te Sn Zn Al Cd Au Mg O Si

393 394 11.7 2.1 50.5 15 0.57 70 405 «2) (0.5) (0.07) (<D (230) (<2)

395 5.4 0.60 12.2 13 .32 1.5 12.2 (<2) (•4) (.13) (<D (435) (<2)

396 4.2 .50 3.30 9.5 <.l 0.8 5.0 (<2) (.6) «.05) (<D (270) «2)

398 7.0 14 20.1 (11) 11 4.8 24 «2) (22) (.1) (<1) (30) (<2)

399 506 (-95) 116.8 (10) (-50) (-90) 45 (<2) (<D (4) (<D (950) (<2)

400 603 (-250) 181 (9) (-155) (-200) 114 «2) «D (10) (<D (1025) (<2)

454 (150) 400 286 2.2 7 7.5

Lead-Base Alloys

SRM Type

Chemical Composition (Nominal Weight Percent) Wt/

Unit (gram)

(Other Forms) Cu Ni As Sn Sb Bi Ag Fe

53e 127b Bearing Metal (84Pb-10Sb-6Sn) 150

150 11321131 0.054.011 0.003.012 0.057

.01 5.84

39.3 10.26 0.43 0.052 <0.001

Solder (40Sn-60Pb) .06 0.001

Magnesium-Base Alloys

SRM Type

Chemical Composition (Normal Weight Percent) Wt/Unit

(grams) Mn Si Cu Ni Al Pb Fe Zn

171 Alloy 100 0.45 0.0118 0.0112 0.0009 2.98 0.0033 0.0018 1.05

Nickel-Base Alloys

SRM Type

Chemical Composition (Nominal Weight Percent) Wt/

Unit

(grams) C Mn P S Si Cu Ni Cr

349

882 Ni57-Cr20 150

150

0.08

.006

0.43 .0007 0.002 0.29

.006 0.00631.02

57.15 65.2519.50 Ni66-Cu31-A13 0.0014

33
SRM V Mo W Co Ti Al B Fe Nb Ta Zr

349 8820.081 4.04 <0.01 13.95 3.05 0.57

1.23 2.85 0.0046 0.13

.009 <0.01 <0.01 0.081

Trace Elements in Nickel-Bate Superolloy The Gas Turbine Panel of the ASTM-ASME-MPG Joint Committee, through recommendation of its Task Force on Trace Elements in Superalloys, prepared a set of three "Tracealloy" materials, which have

the same common matrix. These were given to NBS for "definitive analysis" of: Pb, Bi, Se, Te, and Tl; trace elements that vary over the concentration range of interest. These SRM's 897, 898, and 899 are in the form of fine articles.

SRM Type

Nominal Trace Composition (Parts Per Million by Weight) Pb Bi Se Te Tl

897 "Tracealloy" A 14.7 (0.53) 9.1 1.05 0.51 898 "Tracealloy" B 3.1 (1.1) 2.00 0.54 2.75 899 "Tracealloy" C 4.9 (0.26) 9.5 5.9 0.252

Approximate Base Composition (Weight Percent) C Cr Co Ni W Nb Al Ti B Zr Ta Hf

897 (0.12) (12.0) (8.5) (Bal) (1.75) (0.9) (2.0) (2.0) (0.010) (0.10) (1.75) (1.2) 898 (0.12) (12.0) (8.5) (Bal) (1.75) (0.9) (2.0) (2.0) (0.010) (0.10) (1.75) (1.2) 899 (0.12) (12.0) (8.5) (Bal) (1.75) (0.9) (2.0) (2.0) (0.010) (0.10) (1.75) (1.2)

Nickel Oxide The nickel oxide SRM's are available primarily for application in the electronics industry to the analysis of cathode grade nickel. The "Standard Method for Spectrochemical Analysis of Thermionic Nickel Alloys by the Powder-DC Arc Technique," ASTM Designation El 29, is based on calibration with these

standards. The values given are for the percentage of the element in nickel oxide. Values in parentheses are not certified, but are given for information only.

SRM Type

Chemical Composition (nominal Weight Percent) Wt/

Unit

(grams) Mn Si Cu Cr Co Ti Al Fe Mg

671 Oxide 1 25 0.13 0.047 0.20 0.025 0.31 0.024 0.009 0.39 0.030 672 Oxide 2 25 .095 .11 .018 .003 .55 .009 .004 .079 .020 673 Oxide 3 25 .0037 .006 .002 .0003 .016 .003 .001 .029 .003

34
Nominal Trace Composition (Parts Per Million by Weight) SKM

Pb Se Bi As Sn Sb Cd Ga Ag Te Tl Zn

671 16 2.0 0.07 (59) (2.7) (0.4) (0.7) (0.8) (0.5) K0.2) (<0.1) (160) 672 38 0.40 .3 (74) (4) (-5) (1.7) (•4) (.3) «.2) (140) 673 3.5 .2 .06 (0.4) «0.5) «.05) (0.05) K-i) «1) (4) (1.7)

Selenium

SRM Type

Chemical Composition (Nominal Parts Per Million) Wt/

Unit

(grams) Mn S Cu Ni Cr V Mo Co As Sn

726 Selenium, Intermediate Purity 450 <0.3 12±3 <1 <0.5 <1 N.D. <0.3 N.D <2 <1

SRM Al B Pb Bi Ag Ca Mg Te Fe CI Ti Be Cd In

726 <1 <1 <1 N.D. <1 <1 <1 0.3±0.1 1 <0.5 <0.5 N.D. N.D. N.D.

N.D. = Not detected at limits of detection of <0.5 ppm.

Tin-Bate Alloys

SRM Type

Chemical Composition (Nominal Weight Percent) Wt/

Unit

(grams) Pb Sn Sb Bi Cu Fe As Ag Ni

54d 170 0.62 88.57 7.04 0.044 3.62 0.027 0.088 0.0032 0.0027

Titanium-Bate Alloys Chemical Composition (Nominal Weight Percent) SRM Type Wt/

Unit

(grams) C Mn Si Cu V Mo Sn Al Fe N

173b 6A1-4V (IN PREP)

174 4Al-4Mn 100 4.57 0.015 4.27

5.16 0.175

.070 0.012.010 176 5Al-2.5Sn 100 .015 0.0008 .003 .0003 2.47 650 Unalloyed (IN PREP)

651 Unalloyed (IN PREP)

652 Unalloyed (IN PREP)

35
Zinc-Base SRM Type Wt/

Unit

(grams)

Chemical Composition (Nominal Weight Percent) Mn Cu Ni Sn Al Cd Fe Pb Ag Mg Ti

94c

728

Die Casting

Alloy. Zinc

150 4500.014 1.01 0.00057

0.006 0.006

(.000002)

4.13 0.002

.00012

0.018

.00027

0.006

.00111

0.042

0.00011

Zirconium-Base

SRM Type

Chemical Composition (Nominal Parts Per Million) Wt/

Unit (grams) C Mn Si Cu Ni Cr Ti Sn (Wt%) Fe N U

360a Zircaloy-2 100 136 3 51 140 554 1060 27 1.42 1441 43 0.15

Nonferrous Alloys (Solid Form) These SRM's are designed to fill the basic needs of the nonferrous primary and secondary metals in- dustries for analytical control, primarily with optical emission and x-ray spectroscopic methods. Both

nominal chemical composition and analytical range SRM's have been prepared for many of the commercially important nonferrous alloy systems.

Aluminum "Benchmark" Standards Aluminum "benchmark" standards are being prepared in a cooperative Industry-ASTM-NBS pro- gram. Five SRM's in disk form, are intended for use primarily in optical emission and x-ray spectrometric methods of analysis. Selection was made to include (annealed) aluminum alloys, 6011 (Modified) and 7075/

7078; two large tonnage casting alloys 356 and 380; and a high purity aluminum. These materials will also be available in the form of chips, for checking chemical methods of analysis (See page 31).

SRM Type Size Chemical Composition (Nominal Weight Percent)

Si Fe Cu Mn Cr Ni Zn Mg Be Ti Pb Sn

1255 1256

1257

1258 1259

Casting (356) 64mm dia X

19mm thick 64mm dia X

19mm thick (IN PREP) 35mm dia X

19mm thick 35mm dia X

19mm thick

7.17

9.18

0.15

.94

0.12

3.51

0.055

.35

0.013

.055

0.014

.37

0.083

.96

0.35

.063

0.15 0.015

.10

0.018

Casting (A380) .10 (IN PREP).

Pure Aluminum .. Alloy 6011

.077

.78

.18

.079

.205

.84

1.60

.48

.079

.0011

.173

.0006

.063

1.03

5.44

.98

2.48

<0.0001

Alloy 7075 .0025

36
Copper-Base Alloys A number of copper-base alloy SRM's were prepared to provide for analytical control by rapid instru- mental methods in the copper industry. These SRM's are for calibration of optical emission and x-ray spec- troscopic equipment. Eight groups were prepared in two forms: chill-cast (with "C" prefix) for the producer (blocks, 31 mm square, 19 mm thick), and wrought for the consumer (disks, 31 mm in diameter and 19 mm thick). Both forms have nearly identical chemical compositions. Consequently, when the supply of one

form is exhausted, the other is the recommended replacement. For each of the eight principal copper-base

alloys, three SRM's were prepared to comprise a "nominal-composition", and both a low- and high-composition standard. To make the cartridge-brass SRM's more widely applicable, a number of trace elements were purposely added and certified. The beryllium copper SRM's are representative of the nominal chemical composition of three Copper and Brass Research Association (CABRA) alloy designations. Values in parentheses are not certified, but are given for information only.

Type

Chemical Composition (Nominal Weight Percent) Zn Pb Fe Sn Ni Al Sb

1104 C1104 CI 105 1106 CI 106 1107 CI 107 1108 CI 108 1109 CI 109 1110 C1110

1111 Cllll

1112 C1112

1113 C1113

1114 C1114

1115 CI 115 1116 C1116

1117 C1117

1118 C1118

1119 C1119

1120 CI 120 C1121

1122 CI 122 1123 C1123

1275 1276

Cartridge Brass B

Cartridge Brass C

Free-Cutting Brass A

Free-Cutting Brass B

Free-Cutting Brass C

Naval Brass A

Naval Brass B

Naval Brass C

Red Brass A

Red Brass B

Red Brass C

Gilding Metal A

Gilding Metal B

Gilding Metal C

Commercial Bronze A

Commercial Bronze B

Commercial Bronze C

Aluminum Brass A

Aluminum Brass B

Aluminum Brass C

Beryllium Copper CA-172

Beryllium Copper CA-170

Beryllium Copper CA-175

Cupro-Nickel (CDA 706).. Cupro-Nickel (CDA 715)..

69.50

72.85

59.23

61.33

63.7

59.08

61.21 64.95

82.2 84.59 87.14

93.38

95.03

96.45 87.96

90.37

93.01

75.1

77.1

80.1 97.49

97.45 97.10

88.2 67.8

30.30 27.10

35.7 35.3 34.0 40.08

37.34

34.42

17.4 15.20

12.81

11.73 9.44

6.87

21.9 20.5

18.1

(0.01)

(.01)

(.01) .085 .038

0.05 .020

3.73 2.77

2.0 0.032

.18 .063

.075

.033

.013

.057 .026

.012

.013 .042

.069

.025 .050

.105

(.002)

(.003)

(.001) .006

.004

0.037

.011

.004

.037 .050

.053

.033 .010

.070

.043 .017

.13 .046

.014

.065 .030

.015

.085

.16

.04 1.46 0.56

0.016

.006

.43

.21

.74 1.04 0.39

.10

.051 .019

.12 .064

.027

.10 .044

.021

.01 (.01)

(.01)

0.013

.005

.16 .070

.043

.025 .098

.033

.10 .053 .022

.100

.057

.021

.012

(.01)

(.01) 9.76

B0.

5

0.0006

.0007 0.012.005 0.009.004

2.80

2.14

1.46

0.07

.17 .02

.010

.050

.100

.007 .040

.090

.0005 .0004 (<0.001) «.001)

37
C1103 C1104

CI 105 CI 106 CI 107 C1108

CI 109 C1110

Cllll C1112

C1113 C1114

C1115 C1116

C1117

C1118 C1119

CI 120 C1121 C1122

C1123

Be Bi Cd Mn P Si Ag Te Co Cr Se Mg B s Ti

0.00055

.00003 0.0004.0005 0.0055.0045 0.0055.0045 0.0020.0048

.003

.005

.003

(0.005) .002 0.003 .0010 0.0015

.0003

.005

.025

.006

.009

.008 .009

.005

.008 .002

.13 .070

.018

(.005)

(.004)

(.002) .005 .006

.0021 .0015

.0011

.11 .17

.03 (.001)

(.001)

1.90

1.75 0.46

(.004)

(.004)

(.002)

.42

1.01

(.005)

(.005)

(.009) (.004)

(.004)

0.295 (0.002) (.002)

(.002) (.0002)

(.0002)

.220

2.35 (<0.001) .0003 .0002

(.0002)

(.0002) 0.024

.045 0.0004.0005 0.003.12 (0.0009) (.0001)

(0.008) .008)(0.0002) (COOOl) (.0002)

Copper "Benchmark" Standards The copper "benchmark" standards were prepared in a cooperative Industry-ASTM-NBS program

and were designed primarily for use in calibration with optical emission methods of analysis. They should

also serve in the development of other new or improved trace methods of analysis. Twelve different compositions are to be issued as 25 SRM's Cu "O" and Cu XI will be issued in chip form only. Cu IV is available only in rod form 6.60 mm in diameter and 103 mm long, but is to be issued later as a water- atomized powder. Cu I, II, III, V, VI, VII are available both as chips and as rods 6.35 mm in diameter,

103 mm long. Cu VIII, IX, and X will be issued as chill-cast and unidirectionally solidfied blocks 32 mm

square and 19 mm thick, Cu VIII-Cu X are phosphorized copper containing a nominal concentration range from about 10 to 500 ppm for the same 20 trace elements contained in the other copper "benchmark"

SRM's, plus 5 to 8 additional elements. These SRM's are applicable for x-ray fluorescence methods of analysis and, because of deliberate additions of gold and silver (in ratios of 1 to 4), for calibration of fire assay equipment.

38
SRM Type

Chemical Composition (Nominal Parts Per Million) Form Cu(Wt%) Sb As

494

495 496

457

498 499

500 C1251 C1252

C1253

Unalloyed—Cu I Unalloyed—Cu II .... Unalloyed—Cu III... Unalloyed—Cu IV... Unalloyed—Cu V .... Unalloyed—Cu VI... Unalloyed—Cu VII

.

Unalloyed—Cu VIII Unalloyed—Cu IX... Unalloyed—Cu X ....

rod.

rod.

rod.

rod. rod.

rod.

rod.

disk disk

disk

99.91 99.94

99.95 99.96

99.98 99.79 99.70

99.96

99.89

99.42

4.5

8.0 <1

0.2

7.4 30

100

12.6 42

132)

2.6

1.6 <0.2

0.2 2547

140

(8) 124 244

0.35

.50

.07

.2 2.0

10.5 25

(3) 20

70

(-155)

(-100)

(-150)

2.0

11 2142

(10) (40) (300)

SRM Pb Mn Ni Se Ag Te Sn Zn

494 26.5 3.7 11.7 2.1 50 0.6 70 400

495 3.2 5.3 5.4 0.6 12.2 .3 1.5 12 496 0.4 7.5 4.2 .5 3.3 <.l 0.8 5.0 457 .5 <0.1 0.6 3.3 8.1 .5 <.2 <11

498 10 (•3) 7.0 14 20.1 11 5 25 499 114 (•3) 504 (-90) 114 (-50) (-90) 41 500 128 (•2) 603 (-200) 176 (-155) (-250) 111 C1251 7.5 (7) 22 8.6 81.4 (12) (15) 8.3 C1252 60 (28) 128 46 166.6 (44) (124) 60 C1253 244 [-300] (500) 140 503 (193) (489) 368

SRM Al Cd Cr Co Au Mg O S

494 «2) (0.5) 2.0 0.5 (0.07) «1) (230) 15 495 «2) (•4) 6.0 .3 (.13) «1) (435) 13 496 «2) (.6) 4.3 .4 «05) «1) (270) 9 457 «2) (<1) (0.3) (.2) «.05) «D (360) (4) 498 «2) (22) (.3) 2.7 CD «1) (30) (ID

499 «2) «1) (5) 0.5 (4) «D (950) (10) 500 «2) «1) (•5) .5 (10) «D (1025) (9) C1251 [-5] [-3] 2.8 8.8 15.0 (10) [-120] (22) C1252 [-40] [-15] 7.4 90 34.9 (20) [-150] (29) C1253 [-160] [-60] (187) (510) 74.4 (80) [-85] (50)

Lead-Base Alloys SRM 31.4 mm D X 19 mm thick Type

Chemical Composition (Nominal Weight Percent) Other Forms Cu Ni As Sn Sb Bi Ag Fe

1131 1132 Solder Pb60-Sn40 127b

53e

0.011

.054 0.012

.003

0.01 .057

39.3 5.84

0.43

10.2 0.06

.052

0.01 Bearing Metal <0.001

39
Nickel-Bate Alloys SRM 31 mm

D X 19 mm

thick Type

Chemical Composition (Nominal Weight Percent) C Mn P S Si Cu Ni Cr Mo Co Fe

1159 1160Ni48, balance Fe

Ni80, Mo4, balance Fe

0.007

.019 0.305

.550 0.003

.003 0.003

.001 0.32.37 0.038

.021 48.280.3 0.06.05 0.010

4.35 0.022.054 51.0

14.3

Titanium-Bate Alloy* SRM 31 mm

D X 19 mm

thick Type

Chemical Composition (Nominal Weight Percent) Mn Cr Fe Mo Al V

641 642

643 644

645 646

654a*

8Mn (A) 6.68

9.08

11.68 8Mn (B) 8Mn (C) 2Cr-2Fe-2Mo (A) 1.03 1.96 3.43

(0.20)

1.36 2.07 2.14

(0.20)

3.61 2.38

1.11 «0.05)

2Cr-2Fe-2Mo (B) 2Cr-2Fe-2Mo (C) 6A1-4V (B) «o.i) 6.3, 3.95 *31 mm D X 6.4 mm thick.

Zinc-Base Alloys Zinc-base alloy SRM's are available ranging from very high-purity zinc to commercial materials such

as spelter and die-casting alloy compositions. They are supplied as bar segments (disks) intended for cali- brating and checking optical emission and x-ray spectroscopic techniques. The certificate of analysis supplied with each gives the chemical composition determined at NBS and values determined by other laboratories that have cooperated in the certification of the SRM's. For high-purity Zinc, see High-Purity Metals, page 41. (Values in parentheses are not certified, but are given for information only.)

SRM Type

Chemical Composition (Nominal Weight Percent) Cu Al Mg Fe Pb Cd Sn Cr

625 Zinc-base A-ASTM AG 40A 0.034 3.06 0.070 0.036 0.0014 0.0007 0.0006 0.0128 626 Zinc-base B-ASTM AG 40A .056 3.56 .020 .103 .0022 .0016 .0012 .0395 627 Zinc-base C-ASTM AG 40A .132 3.88 .030 .023 .0082 .0051 .0042 .0038 628 Zinc-base D-ASTM AC 41 A .611 4.59 .0094 .066 .0045 .0040 .0017 .0087 629 Zinc-base E-ASTM AC 41 A 1.50 5.15 .094 .017 .0135 .0155 .012 .0008 630 Zinc-base F-ASTM AC 41A 0.976 4.30 .030 .023 .0083 .0048 .0040 .0031 631 Zinc spelter (modified) .0013 0.50 «001) .005 (.001) .0002 .0001 .0001

SRM Mn Ni Si In Ga Ca Ag Ge

625 626

627

628 629 630

631

0.031

.048 .014 .0091 .0017

.0106

.0015

0.0184

.047 .0029

.030 .0075

.0027 (<.0O05)

0.017

.042

.021 .009

.078

.022 <.002 (0.0023) (0.002) <0.001 «0.0005) (0.0002)

40
Zirconium-Base Alloys SRM 31 mm

D X 9.5 mm

thick Type

Chemical Composition (Nominal Weight Percent) Cr Cu Fe Mn Mo Ni N Si Ti W U

Zirconium C

Unalloyed Zirconium A

.

Unalloyed Zirconium B.. Unalloyed Zirconium C.

Zircaloy D.

Zircaloy E.. Zircaloy F..

(170)

(240)

(100)

(310) (170)

0.063

(55)

(60) (250) (1510)

(580) (1655)

0.015 «10)

(80) (250) «10)

(160)

(130)

0.071 (240)

(850) (1700)

(1650)

(2500)

(2300)

0.03C

(10)

(25)

(45)

(10)

(60)

(50)

0.012

(2) (40) (100) «10)

(120)

(45)

0.043 9.012] 0.0351 0.015

(20)

(65) (140)

(40) (100)

(45)

(40)

(95) (205)

(35) (170)

(95)

(20)

(90)

0.014

(25)

(50) (185)(140)

(30) (100)

(40)

Gases in Metals

Certified for Hydrogen, Oxygen, and Nitrogen The SRM's are used in the determination of hydrogen, oxygen and nitrogen by vacuum fusion, inert gas fusion, and neutron activation methods. SRM's 1095 to 1099 were prepared from the same melt as the "1200" series (1261-1265), see page 24. Values in parentheses are not certified; they are given for information only.

Type Form Oxygen

(PPm) Hydrogen

(ppm)

Unalloyed titanium for hydrogen

Unalloyed titanium for hydrogen

Unalloyed titanium Unalloyed Zirconium

Unalloyed Zirconium

Unalloyed Titanium Unalloyed Titanium Unalloyed Titanium

Ingot iron

Stainless steel (AISI 431) Vacuum-melted steel Valve steel Maraging steel AISI 4340 steel AISI 94B17(Mod) steel Cr-V (Mod) steel High Carbon (Mod) steel Electrolytic iron Set of 5: 1095, 1096, 1097, 1098, and 1099

Platelets.

Platelets. Rod

Wire

Wire

Chips Chips

Chips Rod

Rod

Rod

Rod Rod

Rod Rod

Rod

Rod

Rod

Rods

3031

(1200) (1100)

(1350)

(840) (1450) 491

1312860

4.5 9

10.7 6.6 10

61

20

215

19 107 116

57.5 88.5

"Sold only in sets as SRM

High-Purity Metals Very high-purity metal SRM's are being made available to fill the needs of analysts determining impurity elements in high-purity metal materials. They are intended to serve as bench marks in calibration of methods and equipment; also, they are expected to be valuable in the development of new or improved

methods and techniques for extending the sensitivity of detection in the determination of trace constituents

41
in various materials by chemical, optical emission, solid mass spectroscopy, activation, and resistivity methods of analysis. The Certificate of Analysis supplied with each high-purity SRM gives the state-of-the-art information on chemical composition in the cooperating laboratories for the various trace determinations reported. High-purity gold is available in both wire and rod form. The wire form (W), is intended for applications such as spark source mass spectroscopic techniques. The low levels of impurities make it important

for evaluating instrument and system blanks. The rod form (R), is intended for application in other methods of characterization. Platinum is available in wire form as a high-purity material and as doped composition material. Zinc is available in a high-purity and in a less pure version. Both were prepared from the same start- ing material. The high-purity material is the result of further purification by vacuum distillation, zone refin- ing, and degasification. The zinc is supplied in the form of semi circular bar segments.

SRM Type

Chemical Composit

Per Mi

"

ions (Nominal Parts

lion by Weight)

685W*

685R*

680aLl 680aL2

681L1 681L2

682* 683*

High-Purity Gold (Wire) High-Purity Gold (Rod)

High-Purity Platinum (Wire) High-Purity Platinum (Wire) Doped-Platinum (Wire) Doped-Platinum (Wire) High-Purity Zinc

Zinc Metal

1.4mm D X 102mm long 5.9mm D X 25mm long 0.51mm D X 102mm long 0.51mm D X 1.0m long 0.51mm D X 102mm long 0.51mm D X 1.0m long

Semicircular segments 57mm D

X 19mm long. Semicircular segments 57mm D

X 19mm long.

0.1

.1

.1

.1 5.1

5.1 0.042

5.9

<1

<1

0.5

0.5 (0.02)

(.02)

<0.1

<0.1

11

11

SRM Ag Mg In Fe O Pd Au Rh Ir Cd Ti 685W*

685R*

680aLl 680aL2

681L1 681L2

682*

683*

[0.1] [1] <.l <1

2.0

2.0

(0.02)

1.3

0.007

.007

0.3

.2 1.3

1.3

5

5(0.1) 2.2

[2] [<2]

4

4

77

<1

<1

12

12

0.2

.2 6

6

<1

<1

99

<0.2

<-2

9

9

<0.01

.01

1111

(0.1)

1.1 (0.2)

Certificate gives upper limits for other elements found to be present.

Microanalytical Standards These SRM's provide a highly homogeneous material at about the micrometer of spatial resolution. They are intended primarily for use in calibration of quantitative electron probe, secondary ion mass spec- trometry, spark sources, mass spectrometry, and laser probe microanalytical techniques.

Cartridge Brass Cartridge Brass, SRM 478, consists of two specimens: A chill-cast cube (6mm on edge) with a pol- ished chill-cast face and a wrought right circular cylinder (6mm in diameter and height). SRM 478 is homogeneous at micrometer levels of spatial resolution for both copper and zinc. Details of the homogeneity testing are in NBS Miscellaneous Publication 260-10. Extensive tests of SRM 478 with

electron probe microanalyzers show that satisfactory analytical calibration can be performed using SRM

478.

42
Fe-Cr-Ni Alloy The Fe-Cr-Ni alloy, SRM 479a, is a wafer (4.6 mm in diameter and 1 mm thick) and is characterized

for chemical homogeneity of iron, chromium, and nickel at the micrometer level of spatial resolution. It is satisfactory for use as a homogeneous material for electron probe microanalysis.

Tunsten—20% Molybdenum The tunsten-20% molybdenum alloy, SRM 480, is a wafer (1 mm in diameter and 1 mm thick) with a core of tunsten-20% molybdenum wire embedded in pure molybdenum onto which pure tungsten has been

deposited by electroplating to provide a composite. Details on homogeneity characterization are given in NBS Spec. Publ. 260-16. (See inside back cover for ordering instructions.)

Gold-Silver

Six color-coded wires (0.5 mm in diameter and 50 mm long) comprise SRM 481. The wires consist of

a high-purity gold and a high-purity silver wire and four wires with nominal chemical composition differ- ences in steps of 20%.

Gold-Copper

Six color-coded wires (0.5 mm in diameter and 50 mm long) comprise SRM 482, which is similar to the gold-silver set. In both sets special precautions were taken to achieve homogeneity on a microscopic

scale.

lron-3% Silicon The iron-3% silicon microprobe, SRM 483, is a platelet (3 mm X 3 mm X 0.28 mm), and is characterized for chemical homogeneity of iron and silicon at the micrometer level of spatial resolution. It is satis- factory for use as a homogeneous material for electron probe microanalysis.

SRM Type

Chemical Composition (Nominal Weight Percent) Au Cu Ag w Mo Si Fe (by

differ- ence) Cr Ni Zn

478 479a 480

481

482

483

Cartridge Brass 72.85 27.

1

0 Fe-Cr-Ni Alloy 71.0 18.1 10.9 78.5 21.5 AulOOA 100.00 Au80-Ag20B 80.05 19.96 39.92 59.90

77.58 100.00

Au60-Ag40C 60.05 Au40-Ag60D 40.00 Au20-Ag80E 22.43 AglOOF AulOOA 100.00

80.15 60.36 40.10

20.12

Au80-Cu20B 19.83 39.64

59.92

79.85 100.00

Au60-Cu40C Au40-Cu60D

Au20-Cu80E CulOOF

Iron-3% Silicon 3.22 96.7-96.8

43
Primary, Working, and Secondary Standard Chemicals These SRM's are high-purity chemicals defined as primary, working, and secondary standards in ac- cordance with recommendations of the Analytical Chemistry Section of the International Union of Pure and Applied Chemistry [Ref. Analyst 90, 251 (1965)]. These definitions are as follows: Primary Standard:

a commercially available substance of purity 100±0.02 percent (Purity 99.98+ percent). Working Standard:

a commercially available substance of purity 100±0.05 percent (Purity 99.95+ percent). Secondary Standard:

a substance of lower purity which can be standardized against a primary grade standard.

Type Wt/Unit

(grams)

Certified Use

Purity

Stoichio- metric

17c 40h

41b

83d

84j 136c 350a 723a

944 949e 950b

951 960

984

985 987

999

Sucrose Sodium Oxalate Dextrose (D-glucose) Arsenic Trioxide (IN PREP).

Acid Potassium Phthalate

Polarimetric Value

Reductometric Value. Reductometric Value. Reductometric Value. Acidimetric Value

Potassium Dichromate

Benzoic Acid

Tris(hydroxymethyl)aminomethane

.

Plutonium Sulfate Tetrahydrate Plutonium Metal Uranium Oxide (U3Os )

.

Boric Acid Uranium Metal Rubidium Chloride Potassium Chloride Strontium Carbonate .... Potassium Chloride.

60

30

50

0.5

0.5 25

10026

0.25

1

1 60

Oxidimetric Value. Acidimetric Value.

Basimetric Value... Assay

Assay Uranium Oxide Standard Value

Acidimetric and Boron Isotopic Value. Assay

Assay and Isotopic Assay and Isotopic Assay and Isotopic Assay Standard for: Potassium

Chloride

a Sucrose = Moisture < 0.01 percent, Reducing Substances < 0.02 percent, Ash 0.001 percent.

b Dextrose = Moisture 0.07 percent, Ash 0.002 percent.

( a) 99.95

( b) 99.996

99.98

99.99 99.97

100.00 99.996

99.968

100.00 99.975

99.90

99.99

99.98

99.98 99.99

Microchemical Standards These SRM's are furnished as fine crystals of suitable homogeneity for use as standards for conventional microchemical methods of analysis employing samples of approximately 5 mg. See also Microanalytical Standards, page 42.SRM Type Wt/

Unit

(grams) Elements Certified

140b

141c

142 143c

148 2141 2142

2143

2144

Benzoic Acid

Acetanilide Anisic Acid

Cystine

Nicotinic Acid Urea

o-Bromobenzoic Acid

p-Fluorobenzoic Acid

m-Chlorobenzoic Acid

22

2

2

2

2

2

2

2

C,H

N,C,H

Methoxyl (CH 3 0—

)

S,C,H,N N,C,H N

BrF

CI

44
Clinical Laboratory Standards These SRM's are intended for use in calibrating apparatus and validating analytical methods used in

clinical and pathological laboratories, and to assist manufacturers of clinical products in meeting the chemical and physical specifications required for clinical chemicals. (For details on SRM's 930D and 931c, see Spectrophotometric Filters, page 75.)

Type

Associated NBS

Publications Purity Wt/Unit

Antiepilepsy Drug Level Assay. Human Serum

Sodium Pyruvate (IN PREP)

Cholesterol Urea ." Uric Acid

Creatinine Calcum Carbonate

drugs/3 levels

Bilirubin D-Glucose

Potassium Chloride. Sodium Chloride D-Mannitol

SP 260-63 SP 260-60

Cortisol

Tris (hydroxymethyl) aminomethane

Tris (hydroxymethyl) aminomethane HC1 .... Lithium Carbonate VMA (4-hydroxy-3-methoxymandelic acid)

Bovine Serum Albumin (Powder)

Bovine Serum Albumin (7% Solution) Lead Nitrate Magnesium Gluconate

99.8

99.8

99.7

99.8 99.9 99.0

99.9

99.9

99.9

99.8

98.9

99.9

99.7 100.0 99.4

100.00

100.1 Glass Filters for Spectrophotometry

Liquid Filters for Spectrophotometry

Quartz Cuvette for Spectrophotometry

Clinical Laboratory Thermometer

Crystalline Potassium Dichromate (UV Absorbance) Standard . Quinine Sulfate Dihydrate (Fluorescence)

Iron Metal Gallium Melting Point

SP 260-51 SP 260-32 SP 260-48 SP 260-54 SP 260-64

tt

(99.972)***

(98.2)*** 99.90 SP 481

2g

25 g

10 g

10 g

20 g

100 mg

25 g

30 g

30 g

50 g lg

25 g

35 g

30 g

1 g 5g

10 vials, 2.15 mL ea. 30 g 5g

Set of 3 3 sets of 4

1 each

1 each

15 g

1 g

50 g

1 ea. + Certified for optical properties (see p. 76.) ttlndividually calibrated at 0, 25, 30, and 37 °C. **Conforms to NCCLS specification ACC-1.

***Apparent purity, certified for optical properties. + + +Melting Point Certified at 29.7723 °C. (See p. 71.)

Biological Standards These SRM's are intended for use in the calibration of apparatus and methods used in the analysis of

biological materials for major, minor, and trace constituents. (Values in parentheses are not certified, but are given for information only.) SRM Type Wt/Unit

(grams) SRM Type Wt/Unit

(grams)

1566

1567 1568

1569

Oyster Tissue 30

80

8050

1572

1573

1575 1577a

Citrus Leaves (IN PREP)

Wheat Flour Tomato Leaves 70

70

50 Rice Flour Pine Needles Brewers Yeast Bovine Liver (IN PREP)

45
Element SRM

Content in u.g/g (or where noted, wt %)

1566 1567 1568 1569 1573 1575

(0.12%) 545

(0.2) Arsenic _ 13.41 (0.006) 0.41 0.27 0.21 Beryllium Boron (30) Bromine (55) (26)

3.5 0.15%

(9)0.032 0.019%(1)0.029 0.014%

(9) «0.5)

0.41%

(0.4)

Cadmium

3.00%

Cerium (1.6) (1.0%)

0.69

(0.4) 63.0

Chromium 2.12 4.5

(0.6)

11(0.04)

2.6

(0.1) 3.0

(0.006)

Cobalt 0.02

2.0 2.2

Iodine (2.8) Iron 195 18.3 8.7 690

(0.9) 6.3 (0.7%)

238

(0.1)

200

(0.2) 10.8 Lanthanum

Lead 0.48 .128%

17.5 0.057

'(<0.2)

1.03

Magnesium

Manganese 8.5 0.001

(0.4) (0.18)

20.1 0.0060

(1.6) (0.16)

675 Mercury 0.15 Molybdenum

Nickel (3.5) (1.2%) 0.12%

0.37%

11.7 (0.03)

(5.0%) 0.34%

4.46%

16.5 (0.13)

Phosphorus (0.81%) 0.969%

4.45 Potassium 0.136%

(1) 0.112%

Rubidium (7) Scandium

2.1 1.1 0.4

Silver 0.89 0.51%

10.36 (.076%)

Sodium 8.0 6.0 Strontium 44.9 4.8 Sulfur (>0.002) (>0.002) Thallium «0.005)

(0.1) 0.116 852

(0.05) 0.17 0.061 62

(0.05) 0.037 0.020 Thorium

Uranium

Zinc 10.6 19.4

46
Environmental Standards

Analyzed Gases These SRM's are intended for the calibration of apparatus used for the measurement of various components in gas mixtures, and in some cases for particular atmospheric pollutants. Each SRM is accurately

certified and is primarily intended to monitor and correct for long-term drifts in instruments used. Each

cylinder contained 870 liters at STP prior to certification, and thus contains somewhat less than 870 L. All

cylinders conform to the appropriate DOT specifications. Type Nominal Concentrations Methane in Air Methane in Air Methane-Propane in Air

Sulfur Dioxide in N2 Sulfur Dioxide in N2 Sulfur Dioxide in N2 Sulfur Dioxide in N2 Propane in Air Propane in Air Propane in Air Propane in Air Propane in Air Carbon Dioxide in Nitrogen ... Carbon Dioxide in Nitrogen ... Carbon Monoxide in Nitrogen Carbon Monoxide in Nitrogen Carbon Monoxide in Nitrogen Carbon Monoxide in Nitrogen Carbon Monoxide in Nitrogen

Nitric Oxide in Nitrogen

Nitric Oxide in Nitrogen

Nitric Oxide in Nitrogen

Nitric Oxide in Nitrogen

Nitric Oxide in Nitrogen Carbon Monoxide in Air Carbon Monoxide in Air Carbon Monoxide in Air Carbon Dioxide in N2 Carbon Dioxide in N2 Carbon Dioxide in N2 Carbon Dioxide in N2 Carbon Dioxide in N2 Carbon Dioxide in N2 Carbon Dioxide in N2 Carbon Dioxide in N2

CH4 , 0.951 fimol/moKppm).

CH4, 9.43 fi,mol/mol(ppm). CH4 , 4.10 n.mol/mol(ppm). C3 He , 0.976 /xmol/mol(ppm). S02 , 480 /j.mol/mol(ppm). S02 , 942 /imol/mol(ppm). S02 , 1497 fxmol/moKppm). S02 , 2521 jxmol/mol(ppm). C3H8, 3 ppm. C3 H8) 10 ppm. C3 H8 , 50 ppm. C3 H8 , 100 ppm. C3 H8 , 500 ppm. C02 , 7.5 mol %. C02 , 15.0 mol %. CO, 10 ppm. CO, 50 ppm. CO, 100 ppm. CO, 500 ppm. CO, 1000 ppm. NO, 50 ppm. NO, 100 ppm. NO, 250 ppm. NO, 500 ppm. NO, 1000 ppm. CO, 10 umol/mol(ppm). CO, 18.1 /xmol/mol(ppm). CO, 43.0 /j.mol/mol(ppm). C02 , 0.5 mol percent. C02, 1.0 mol percent. C02 , 1.5 mol percent. C02 , 2.0 mol percent. C02 , 2.5 mol percent. C02 , 3.0 mol percent. C02 , 3.5 mol percent. C02 , 4.0 mol percent.

47
Type Nominal Concentrations

Nitric Oxide in N2 Nitric Oxide in N2 Carbon Dioxide in N2 .... Carbon Dioxide in N2 .... Carbon Dioxide in N2 .... Carbon Monoxide in N2 Carbon Monoxide in N2 Carbon Monoxide in N2 Carbon Monoxide in N2 Carbon Monoxide in N2 Carbon Monoxide in N2 Carbon Monoxide in N2 Carbon Monoxide in N2 Oxygen in Nitrogen Oxygen in Nitrogen

NO, 1500 fxmol/moKppm). NO, 3000 /xmol/moKppm). C02 300 /imol/mol(ppm). COz 400 jLimol/mol(ppm). C02 800 /xmol/mol(ppm). CO, 25 u.mol/mol(ppm). CO, 250 u.mol/mol(ppm). CO, 2500 u.mol/mol(ppm). CO, 5000 fxmol/mol(ppm). CO, 1 mol %. CO, 2 mol %. CO, 4 mol %. CO, 8 mol %. 02 , 2 mol %. 02 , 10 mol %.

Analyzed Liquids and Solids These SRM's are intended for use in the analysis of materials for constituents of interest in health or environmental problems. See also: Clinical SRM's page 45, and Industrial Hygiene SRM's page 51. SINGLE ELEMENT Concentrations: Weight percent—boldface Microgram per gram—light face Nanogram per milliliter—italics SRM Type Unit Size Lead Sulfur Mercury

1579 1620

1621a

1622a

1623a 1624

1630

1641a

1642a

Powdered Lead Base Paint 35 g 11.87%

Sulfur in Residual Fuel Oil : lOOmL 4.48%

0.94%

1.96% lOOmLSulfur in Residual Fuel Oil 100 mL

Sulfur in Residual Fuel Oil IN PREP

Sulfur in Distillate Fuel Oil IN PREP

Trace Mercury in Coal 50 g 0.13u.g/g. Mercury in Water (u.g/mL) Set 6 1.10u£/mL. Mercury in Water (ng/mL) 950 mL 1.10 ng/mL.

SRM Type Element Certified Nominal Concentration No. Units

1636a Lead in Reference Fuel Pb 0.03, 0.05, 0.07, 2.0g/gal 3 vials each. 1637a Lead in Reference Fuel Pb 0.03, 0.05, 0.07 g/gal 4 vials each. 1638a Lead in Reference Fuel Pb 2.0 g/gal 12 vials each.

48
MULTI-ELEMENT Concentrations: Weight percent—boldface Microgram per gram—light face Nanogram per gram—italics SRM Type Unit size Al Sb As Ba Be Br

1632a 1633a

1634

1635 1643a

1645 1646

1648

Trace Elements in Coal (Bituminous). Trace Elements in Coal Fly Ash... Trace Elements in Fuel Oil

75s (3.1)

(14)

(0.6)

(7)

9.3 75g 145 (0.15) (12) IN PREP

Trace Elements in Coal (Subbitu- minous). Trace Elements in Water (ng/g).... River Sediment

75g (0.32) (0.14) 0.42 76

(66) 950mL 46 19 70g (51) Estuarine Sediment IN PREP

Urban Particulate 2g (3.3) (45) 115 (737) (500)

SRM Cd Ca Ce Cs CI Cr

1632a 1633a 1634a

1635 1643a

1645

1646

1648

0.17

1.0 0.231.11

(30) (180)

(2.4) (11) 34.4 196

0.03 10

10.2

(3.6) 2.5 17

2.96

75 (55) (3) (0.45) 403

SRM Co Cu Eu Ga Hf In

1632a

1633a

1634a

1635 1643a

1645 1646

1648

(6.8) (46)

16.5 118

(0.5)

(4) (8.5) (58)

(1.6)

(7.6)

(0.65) 19

(8)

3.6

18 109

(0.06) (1.05) (0.29)

(18) 609 (.8) (4.4) (1.0)

SRM I Fe La Pb Mg Mn

1632a 1633a

1634a

1635 1643a

1645 1646

1648

1.11 9.4012.4 (0.1) .455 28

(190) 0.239

88

11.3

1.9 27 714

21.4

31

(9) 785

(20) 3.91 (42) 0.655 (.8) (860)

49
SRM Hg Mo Ni K Rb Sm

1632a

1633a

1634a

1635 1643a

1645 1646

1648

0.13

.16 19.4 127

0.42

1.88

(31) (29) 72.4

1.74 55

45.8

(.2)

1.1 95

(1.2) 82 (1.0) (4.4)

SRM Sc Se Si Ag Na Sr

1632a 1633a

1634a

1635 1643a

1645 1646

1648

(6.3) (40) 2.6

10.3 840

22.8 0.17 830

(0.63) 0.9

11 (0.24) 2.8 239

(2) (.55)

(7) (24) (6) (.40)

SRM S Tl Th Ti W U V Zn

1632a 1633a

1634a

1635 1643a

1645 1646

1648

1.62 4.5 24.7(0.18)

(.8) 1.28 10.2 44

(300) 28

5.7 220

0.33 0.62 (.02) 0.24 5.2 53

23.5

4.7 72

1.44 1.62 1.11 1720

(7.4) (.40) (4.8) (130) 4760

Organic Constituents SRM Type Unit of Issue

1580

1644

Shale Oil Set of 5-2 mL ampoules. PAH Generator columns... Set of 3 columns.

Constituents SRM

1580 (ws/

g) SRM 1644

Anthracene (IN PREP).

Benzo [a] anthracene (IN PREP).

Benzo [a] pyrene 21 (IN PREP).

1854 o-Cresol 385 Phenol 407

Permeation Tubes These SRM's are intended for calibrating air pollution monitoring apparatus, and may be used to verify air pollution analytical methods and procedures. Each tube is individually certified.

50
Sulfur Dioxide

Sulfur dioxide permeation tubes are available in three lengths—2, 5, and 10 centimeters. The permeation rates are certified over the temperature range of 20 to 30°C. The following table is provided as a guide in the selection of the appropriate length. The values in the table do not represent certified values

for any SRM. The concentrations of S02 in ppm are based on an approximate permeation rate of 0.28 micrograms per centimeter per minute at 25°C, for flow rates of 1, 5, and 10 liters per minute.

SRM Type

Tube

Length

(cm)

Permeation Rate

Typical

Concentrations (ppm) Flow Rates (liters per minute)

(/ig/min)

(1) (5) (10)

1625 Sulfur Dioxide Permeation Tube 10 2.8 1.07 0.214 0.107 1626 Sulfur Dioxide Permeation Tube 5 1.4 0.535 .107 .0535 1627 Sulfur Dioxide Permeation Tube 2 0.56 .214 .0428 .0214

Nitrogen Dioxide Nitrogen dioxide permeation device (SRM 1629a) is calibrated at 25.0°C only. The temperature coeffi- cient given with each tube provides the means to calculate permeation rates at other temperatures near

25°C. The permeation rates for these tubes are between 0.5 and 1.5/xg/min at 25°C. A tube with a rate of

1.0u.g/min, in an air-flow of one liter per minute at 25°C, will produce a concentration of 0.5 ppm of N02 .

Industrial Hygiene Standards

Freeze-Dried Urine These SRM's consist of two bottles of freeze-dried human urine, one containing a low and one an

elevated level of the element certified. SRM Element Low Level (mg/

L)

Elevated Level (mg/L)

2671 Florine (F-) (IN PREP)

2672 Mercury (IN PREP)

Materials on Filter Media These SRM's consist of potentially hazardous materials deposited on filters to be used to determine the

levels of these materials in industrial atmosphere. SRM Type Material Certified Quantity Certified (/xg/filter)

I II III IV

2674

2673

2675 2676a

2679

Lead on Filter Media Lead 100 500

100

0.052

1.02 6.96

1.97 9.86

3.8 (400)

303 2000

1000

0.26

2.50

15.23 9.89 49.52

29.9 (370)

1505 7000

2500

1.00

1.4 Sulfate and Nitrate on Filter Media Sufate

Beryllium on Filter Media

Nitrate Beryllium Cadmium 10.18

Quartz on Filter Media

Lead 29.64 Manganese 19.70 99.22

76.1 (320)193.2 Clay (200)

51
Forensic Standards These SRM's are intented for use in the calibration of apparatus and the evaluation of methods used in the analysis of materials of interest to law enforcement agencies. (For details on SRM 1820, see Refractive Index Standards, page 77.) SRM Type Certification Unit of Issue

1820

1822

1823

Glass, Borosilicate Refractive Index 2 slabs; one polished, one unpolished.

2 slabs; one polished, one unpolished.

Set of 2; 60 mL each.

Glass, Window (Soda-Lime)

Silicone liquids—I & II Refractive Index

Refractive Index

Metallo-Organic Compounds

These SRM's are intended for the preparation of solutions in oils of known and reproducible concentrations of metals. Because "matrix" effects occur, it is desirable to prepare the standard solutions in oil identical or similar to the oil being studied. Possession of an adequate collection of these metallo-organic SRM's permits the preparation of any desired blend of known concentrations of metal in the appropriate

lubricating oil. They are used primarily for the calibration of spectrochemical equipment used in the deter- mination of metals in lubricating oil. This technique is used extensively in the defense program, the trans- portation industry, and other industries where the consequences of failure of a moving metal part may

range from inconvenient to catastrophic. The Certificate supplied with each SRM gives the percentage of the element of interest and directions

for preparing a solution of known concentration in lubricating oil.

SRM

Constituent Certified Wt/

Unit

(grams) Type

Element (wt. percent)

1075a Al 8.07 5 Aluminum 2-ethylhexanoate. 1051b Ba 28.7 5 Barium cyclohexanebutyrate. 1053a Cd 24.8 5 Cadmium cyclohexanebutyrate.

1074a Ca 12.5 5 Calcium 2-ethylhexanoate. 1078b Cr 9.6 5. Tris( 1 -phenyl- 1 , 3-butanediono)chromium (III). 1055b Co 14.8 5 Cobalt cyclohexanebutyrate. 1080a Cu 16.37 5 Bis (1 -phenyl- 1,3-butanediono) copper (II). 1079b Fe 10.45 5 Tris (1 -phenyl- 1,3-butanediono) iron (III). 1060a Li 4.1 5 Lithium cyclohexanebutyrate. 1061c Mg 6.45 5 Magnesium cyclohexanebutyrate. 1062b Mn 13.2 5 Manganous cyclohexanebutyrate. 1065b Ni 13.89 5 Nickel cyclohexanebutyrate. 1071b P 9.48 5 Triphenyl phosphate. 1066a Si 14.14 5 Octaphenylcyclotetrasiloxane. 1077a Ag 42.60 5 Silver 2-ethylhexanoate. 1069b Na 12.0 5 Sodium cyclohexanebutyrate.

1070a Sr 20.7 5 Strontium cyclohexanebutyrate. 1057b Sn 22.95 5 Dibutyltin bis (2-ethylhexanoate). 1052b V 13.01 5 Bis (l-phenyl-l,3-butanediono) oxovanadium (IV). 1073b Zn 16.66 5 Zinc cyclohexanebutyrate.

52
Wear Metals in Oil These SRM's consist of 12 metallo-organic compounds blended into a base oil.

Type Unit Elements, /xg/g Ag Al Wear metal-in-oil (100 ppm) 85 mL . Wear metal-in-oil (300 ppm) 85 mL .

( )

( ) (98.6) (297)

Cr Cu Fe Mg Mo Ni Pb Si Sn Ti

(102) (97.8) (101) (100) ( ) (98.9) (102) ( ) ( ) (102) (298) (299) (302) (297) ( ) (301) (299) ( ) ( ) ( )

Fertilizer Standards These SRM's are intended for use in the fertilizer industry as working standards for the determination of the certified constituents.

SRM Type Wt/Unit

(grams)

Certified Composition (Wt

percent) N P K

193 194 200

Potassium Nitrate 90

90

90

13.85 12.15 38.66 Ammonium Dihydrogen Phosphate 29.92 Potassium Dihydrogen Phosphate 22.74 28.76

Ores These SRM's are intended for use in checking the accuracy of assay methods. They are certified for

their content of elements of economic interest, and occasionally, have additional data given for information

only. These SRM's are supplied in the form of fine powders, usually less than 0.15 mm.

SRM Type Wt/

Unit (grams)

Chemical Compositions (Nominal Weight Percent) CaF2 LiaO Cu Re Mo

79a

180

181 182

183 330

331 332

333

120

12045

4545

100

97.39 Fluospar, high grade 98.8

6.4

4.3

4.1 Lithium (Petalite) Lithium (Lepidolite) 0.84

.091 0.018

.0022

.64 55.3

100 0.4 ppm

Molybdenum, concentrate 50

55

28.45

1.038

10.2 ppm

0.087

53
SRM Type Wt/Unit

(grams) Chemical Composition (Nominal Weight Percent) AI2O3 BaO Cd CaO CO2

27f 690

691 692

693 69b

696

697

698

120b 277

113a 329

Iron Ore, Sibley 100

150 IN PREP

150

15080

8080

8090

100

0.82

.18

(*)

1.41 1.02

49.3

54.5 45.8

48.2

1.06

0.039

.20

(*).023

.016

.12 .018

.71 .62

49.40 Ca (0.37)

Iron Ore, Canada (Cone.)

Iron Oxide, reduced

Iron Ore, Labrador

Iron Ore, Nimba

Bauxite, Arkansas <0.01

(0.004)

(.015)

(.008)

Bauxite, Surinam

Bauxite, Dominican

Bauxite, Jamaican

Phosphate Rock, Florida 0.002 2.79 Tungsten Concentrate Ta (0.20) Zinc Concentrate 100

100

0.78

.14

1.1. Zinc Concentrate 0.08

SRM Cu Cr203 F In Total Fe Fe203 Pb MgO MnO

27f 690

691 692

693 69b

696

697

698

120b

277

113a 329

65.97

66.85

(*) 59.58

65.11

0.019

.18

(*).035

.013

.085

.012

.18 .058

.28

0.011

.23

(*) .46 .091

.09 .004

.41 .38

.032 Mn (10.0)

0.011

.047 .100

.080

7.14

8.70 20.0

19.6

3.84 1.10 Nb (1.00) (7.4) 2.08

12.9«

(0.07) 2.80

6.06 031.13 2 ND0.019

.75

.165 *To be certified.

SRM P P2O5 K20 Si02 Ag Na20 S S03 Ti02

27f 690

691 692

693 69b

696

697

698

120b

277

113a 329

0.041

.011

(*) .039 .056

0.008

.0030

(*) .039 .0028

.80 .009

.062 .010

.12

4.17

3.71

(*)10.14

3.87

13.4 3.79

6.81 0.69

4.68

Si (0.85)

(1.54)

(0.61)

0.012

.003

(*) .008 .0028

.030

(.007)

(.036)

(.015)

.35

0.005

.003 0.019

.022

(*) .045

.035

2.0 2.64

2.52 2.38

0.15 Ti (2.2)

(*).005

.005 0.012

.050

.97

.37

34.57

0.63

.21 .13 .22

(.03) (.25) (30.6)

(31.7) 02 (21.4) 0.0467 .0089

54
SRM U v2o5 WO, Zn ZnO Zr02 Loss on

ignition Moisture

27f 690

691 692

693 69b

696

697

698 120b 277

113a 329

0.03

.063

.072 .064

0.003 .0014

.037

.029

27.22 0.14

.065

.061

29.9

22.1 27.3 128.4jig/g Mo (0.06) 67.4 Sn (0.54)

57.3 45.5 0.08

.4s

Minerals, Refractories, Glasses, and Carbides These SRM's are supplied in the form of powders, usually less than 0.15 mm. They are intended to provide materials for checking the accuracy of methods used in the analysis of similar materials, primarily

in the glass, ceramics, and steel industries.

Type Wt/Unit

(grams)

Chemical Composition (Normal Weight

Percent as the Oxide) Si02 Fe2Q3 A1203 Ti02 MnO CaO

Limestone, argillaceous Limestone, dolomitic... Feldspar, potash

Feldspar, soda

Clay, flint Clay, plastic Glass sand

Glass sand (low iron) ... Titanium dioxide

6.84

1.20

67.1 65.2

43.7

0.55

.28 .075

.065

.45

1.34 0.082

.012

1.30 0.19

17.9 20.5

38.8

33.2 0.66

.059

0.07

.02

.01 .007

1.90

1.61 0.12

.011 99.74

0.025

.03 50.330.1 0.11 2.14

0.11

.31

'Information values only: S (0.1); SQ3 (0.1); F (0.009); and CI (0.004).

SRM SrO MgO Cr203 Na20 K20 Li20 Zr02 BaO Rb20 P205 co2 Loss on

Ignition

lc88a 70a 99a

97a

98a

81a

165a 154b

0.030

.010 U42

21.3

0.02

.01 2.55

6.2 0.037

.082

0.28

.12

11.8 5.2 0.50

1.04

0.04

.01 39.9 46.7 0.40

.26 13.32

12.44

46.6

0.02

.26 .078

.03

0.06

0.02 .02 ,36

.11

.18

.039

.15

.42

0.03

.03 46\ig/g

(1.1 ii/g)

0.11

.070

0.063

.042 .034

.006

55
Refractories

Type Wt/

Unit

(grams)

Chemical Composition (Nominal Weight Percent as the Oxide) Si02 A1203 Fe203 FeO Ti02 Zr02 MnO P2Q

Burnt Refractory (Al2O3 -40%)

Burnt Refractory (Al2O3 -60%)

Burnt Refractory (Al2O3 -70%)

Chrome refractory

Silica refractory

Silica refractory

54.9 35.0

19.4 4.6

38.7

60.2

71.7 29.96

0.16

1.6o

l.Oo 1.2

0.66

.74

2.03 2.66 3.22 0.22

.02 .06

(0.15)

(.21)

(.31)

.01 <.01

.01

SRM Cr203 CaO MgO Li20 Na20 K20 SrO Loss on

Ignition

76a

77a 78a

103a

198

199

32.06

0.22

.05

.11 .69 2.71

2.41

0.52

.38 .70 18.54 0.07

.13

0.042

.02 5 .12

0.07

.037

.078

1.33 0.090 1.22

0.037

.009

.25

(0.34)

(.22)

(.42)

.001 .002.012

.015 0.017.094

.21 .17

Glasses SRM Type Unit Size Chemical Composition (Nominal Weight Percent) Si02 PbO A1203 Fe203 ZnO MnO Ti02 Zr02

89

919293a 620

621

1830

1831

Lead-Barium 45 g 65.35

67.53

17.50 0.0970.18

6.01 0.049.081 0.088.008

0.01 .019 0.005 Opal 45 g 0.08 .0095 Low-Boron 45 g High-Boron Wafer 32 mm D X 6 mm 80.8 2.3 .029 .012 .03 Soda-Lime, Flat 3 platelets 35 X 35 X 3 mm 72.1 1.8 .04 .02 Soda-Lime, Container 3 disks 38 mm D X 5 mm 71.14 2.77 .040 .014 .009 Soda-Lime Float (in prep.) Soda-Lime Float (in prep.) :

SRM CaO BaO MgO K20 Na20 B203 p2o5 As2Os As203 so3 CI F

Loss on

Igni- tion

89

919293a 620

621

0.21 10.481.40 0.03

.008 8.403.25 5.708.48 0.23.022 0.36.102

0.03

.091 0.03 0.05

.014 0.325.72 0.70 <0.02 12.6

7.1 10.71

<.01

3.7 0.27

0.01

.4 2.01

4.0

14.4

12.71

.06

.03

.3 0.12 .13

56
Carbides

SRM Type Wt/

Unit

(grams)

Total Carbon

(Wt. %)

276a 75 6.11

Cements

These SRM's are furnished for x-ray spectroscopic analysis and for chemical analysis of cements and

related materials. Because these SRM's are hygroscopic, each unit consists of three sealed vials each containing approximately 5 g of material. SRM Type Wt/Unit

(grams) Chemical Composition (Nominal Weight Percent) CaO SiOa A12 03 Fe203 so3 MgO

633 Portland cement (red) 15 64.

5

0 21.88 3.78 4.20 2.20 1.0, 634 Portland cement (gold) 15 62.58 20.7, 5.2, 2.84 2.2, 3.30 635 15 59.8 3 18.4, 6.2 2.61 7.0, 1.2 3 636 Portland cement (yellow) 15 63.5, 23.22 3.02 1.61 2.3, 3.95 637 Portland cement (pink) 15 66.O4 23.0, 3.28 1.80 2.3s 0.6, 638 Portland cement (green) 15 62.0, 21.4. 4.45 3.55 2.3, 3.83 639 Portland cement (clear) 15 65.76 21.6, 4.28 2.40 2.4s 1.2,

SRM K20 Ti02 Na2 0 SrO p2o5 Mn203 F ZnO Cr203 Loss on

Ignition

633 0.17 0.24 0.64 0.31 0.24 0.04 0.08 0.01 0.01 0.75 634 .42 .29 .15 .12 .10 .28 .08 .02 .08 1.62 635 .45 .32 .07 .21 .17 .09 .04 .01 .01 3.24 636 .59 .18 .11 .04 .08 .12 .06 .03 .01 l.i. 637 .25 .21 .15 .09 .24 .06 .04 .01 .01 1.6, 638 .59 .25 .13 .07 .06 .05 .04 .10 .01 0.95 639 .06 .32 .65 .15 .08 .08 .02 .01 .01 1.0,

Trace Element Standards The SRM's listed below were designed for trace chemical analysis, specifically for calibrating instru- ments and checking analytical techniques and procedures used to determine trace elements in various inor- ganic matrices. In addition many SRM's certified for chemical composition have one or more constituents

certified or below the 100 u-g/g level. Some SRM's in the following categories may be of use of in trace

analytical work:

Steels (pages 18-30); High Purity Metals (page 41); Non ferrous alloys (pages 31-40); Environmental

Standards (page 47); and Biological Standards (page 45).

57
Type-Matrix

Trace

Trace

Trace

Trace

Trace

Trace Trace

Trace

Trace

Trace

Trace

Trace Trace

Elements

Elements

Elements

Elements

Elements Elements

Elements

Elements Elements

Elements

Elements

Elements

Elements

in Feldspar

in Glass, Set

in Glass, Set

in Glass, 500 ppm .. in Glass, 500 ppm .. in Glass, 50 ppm .... in Glass, 50 ppm .... in Glass, 1 ppm

in Glass, 1 ppm

in Glass, 0.02 ppm . in Glass, 0.02 ppm . in Glass, Set

in Glass, Set

Wafers

Wafers

Wafers

Wafers

Wafers Wafers

Wafers

Wafers

Wafers

Wafers

Wafers

Wafers

3 mm thick.

1 mm thick.

3 mm thick.

1 mm thick.

3 mm thick.

1 mm thick.

3 mm thick

.

1 mm thick.

3 mm thick.

1 mm thick.

3 mm thick. 1mm thick ..

5 gram.

Set: 2 each 614 and 616.

Set: 2 each 615 and 617. 6 Wafers.

6 Wafers.

6 Wafers.

6 Wafers.

6 Wafers.

6 Wafers.

6 Wafers.

6 Wafers.

Set: 1 each 610, 612, 614 and 616.

Set: 1 each 611, 613, 615 and 617. NOTE: Glass—Nominal Composition: 72% SiQ2, 12% CaO, 14% Na2Q, and 2% A1203

Trace Element Standards (Nominal Concentrations)

Element ou/ t^ppmj 610-611 (ppm)

612-613 (ppm)614-615 (ppm)616-617 (ppm) Antimony (1.06) (0.078)

(41)

(32)

(39)

(35.5) (37.7) (35)

(39)

(36)

(39)

R (351) (1.30) (0.20) r°

°

e iu Cobalt

(444)

0.73

1.37 (0.80) Dysprosium

Europium (0.99) Gadolinium

(1,3)

(0.5) 13.5 (0.83) 2.32

(0.23)

(0.18) (11)

(0.034)

1.85

Gold (25) 458

(5) 51

(36)38.57

(39.6)

(36)38.8

(64)31.4

(39)

Lead 426

485

Nickel , 458.7

(461) 425.7

(0.95) 30

0.855 29 Rubidium 523.90 0.100

(0.59) 0.42

45.8

(0.269) 0.748

(3.1) 0.823

(0.026) Silver (254) 515.5

(61.8) 457.2

(437) 461.5

22.0

78.4

(15.7) 37.79

(50.1) 37.38

(42)

65.485 41.72

(0.0082) 0.0252

(2.5) 0.0721

(433)

In addition to the 36 elements listed above, the Glass SRM's contain the following 25 elements: As, Be, Bi, Cs, CI, F, Ge, Hf, Hg,

Li, Lu, Mg, Nb, P, Pr, Se, S, Te, Tb, Tm, Sn, W, V, Y, and Zr.

58
Nuclear Materials

Special Nuclear Materials These SRM's are available to DOE contractors, NRC or State Licensees, and foreign governments

that have entered an Agreement for Cooperation with the U.S. Government concerning the Civil Uses of Atomic Energy. The purchase request for these SRM's must be made on special forms obtainable from the Office of Standard Reference Materials, Room B311, Chemistry Building, National Bureau of Standards, Washington, D.C. 20234. Plutonium Assay Standards SRM Type Certified for Wt/unit (grams) Purity (percent)

944

945 949e 996

Plutonium sulfate tetrahydrate Plutonium Content 0.5

5 t

0.5

*47.50

(99.9) 99.996 Plutonium metal, standard matrix Plutonium metal assay

Impurities Plutonium Content

Plutonium—244 Spike IN PREP

Stoichiometric fNominal weight (Values in parentheses are not certified, but are given for information only.)

Plutonium Isotopic Standards SRM Type Wt/units

(grams) Atom Percent

238 Pu 239pu »°Pu 2 " Pu 242 Pu

946 Plutonium Sulfate Tetrohydrate 0.25 0.247 83.128 12.069 3.991 0.565 947 Plutonium Sulfate Tetrohydrate .25 .296 75.696 18.288 4.540 1.180 948 Plutonium Sulfate Tetrohydrate .25 .011 91.574 7.914 0.468 0.0330

Uranium Assay Standards SRM Type Certified for Wt/

unit (grams)Purity (percent)

950b

960

993

995

Uranium Oxide. .. Uranium

2526

1510

99.968 (U3 08 ) 99.975 (U)

99.8195 (U-235)

99.9245 (U-233) UraniumUranium

Uranium Isotopic Standards SRM Uranium Oxide (U3 Os ) Wt

(grams) Atom Percent

234TJ 235U 236JJ 230LJ

U-0002 Depleted 1.0 0.00016 0.01755 < 0.00001 99.9823 U-005 Depleted 1.0 .00218 .4895 .0046 99.504 U-010 Enriched 1.0 .00541 1.0037 .00681 98.984 U-015 1.0 .00850 1.5323 .0164 98.443 U-020 1.0 .0125 2.038 .0165 97.933

59
Uranium Isotopic Standards—Continued

SRM Uranium Oxide (U 3 08 ) Wt

(grams) Atom Percent

234 U 235U 236JJ 238IJ

U-030 1.0 .0190 3.046 .0204 96.915 U-050 1.0 .0279 5.010 .0480 94.915 U-100 Enriched 1.0 .0676 10.190 .0379 89.704 U-150 Enriched 1.0 .0993 15.307 .0660 84.528 U-200 Enriched 1.0 .1246 20.013 .2116 79.651 U-350 1.0 .2498 35.190 .1673 64.393 U-500 1.0 .5181 49.696 .0755 49.711 U-750 Enriched 1.0 .5923 75.357 .2499 23.801 U-800 Enriched 1.0 .6563 80.279 .2445 18.820 U-850 Enriched 1.0 .6437 85.137 .3704 13.848 U-900 1.0 .7777 90.196 .3327 8.693 U-930 1.0 1.0812 93.336 .2027 5.380 U-970 1.0 1.6653 97.663 .1491 0.5229

Neutron Density Standard This SRM is provided as a reference source of a cobalt-in-aluminum alloy to serve as a neutron density monitor wire SRM. Accurate determination of thermal neutron densities is essential in irradiation tests to obtain a basis for comparison of densities among reactors, in applying data in the design of reactors, in understanding the mechanisms of radiation damage, and for use in neutron activation analysis. The wire is 0.5 mm in diameter and 1 meter long. SRM Type Cobalt Content (Weight percent)

953 Neutron density monitor wire (Co in Al) 0.116

Fission Track Glass Standards These SRM's, at four uranium concentration levels, will aid fission track laboratories in interlabora- tory comparisons of data and in monitoring neutron flux for irradiations. The fission track glass standards

are certified for the neutron flux (n* cm-2 -sec

-1

) that induced uranium fission in selected wafers. The materials were irradiated in the NBS 10 Megawatt Research Reactor, at two different neutron energies. Each SRM unit contains four unirradiated glass wafers and two irradiated wafers. SRM Total U concentration; ppm (by weight) 235U Atom Percent Irradiation time (sec.)

961 461.5 0.2376 RT-3 8 RT-4 12 962a IN PREP

963a IN PREP

964 0.0721 0.616 RT-3 360 RT-4 540

60
Isotopic Reference Standards The isotopic composition of these SRM's has been determined by mass spectrometry, by comparison

with mixtures prepared from high-purity separated isotopes: They are useful for those looking for small

variations in the isotopic composition of the elements, and for the evaluation of mass discrimination effects encountered in the operation of mass spectrometers.

Isotopic Reference Standards Element Certified Wt/Unit (grams)

Boric Acid

Boric Acid, 95% Enriched Sodium Chloride Copper Metal Sodium Bromide

Silver Nitrate Chromium Nitrate Magnesium Metal Lead Metal, Natural Lead Metal, Equal Atom (206/208).. Lead Metal, Radiogenic (92%-206) Rubidium Chloride, assay and isotopic .... Strontium Carbonate, assay and isotopic. Rhenium, assay and isotopic

Silicon, assay and isotopic

Lead-206 Spike, assay and isotopic Uranium-235 Spike, assay and isotopic (Solution). Uranium-233 Spike, assay and isotopic (Solution)

Boron

Boron

Chlorine Copper

Bromine

Silver Chromium

Magenesium

Lead Lead

Lead

Rubidium

Strontium Rhenium

Silicon

Lead Uranium Uranium

*Sold as a set only of three 981, 982, and 983. "Special Nuclear forms required.

CERTIFIED PHYSICAL PROPERTIES STANDARDS

Ion Activity Standards These SRM's are intended for use in the preparation of solutions for the calibration of specification electrodes. This include the pH and pD measuring systems.

pH Standards These SRM's are furnished as crystals for the preparation of solutions of known hydrogen ion concentration for calibrating and checking the performance of commercially available pH materials and instru- ments. They are furnished with certificates giving directions for preparation of the solutions and tables of pH values at various temperatures. SRM's 1861c and 18611c, 191 and 192, and 922 and 923, are certified for use in admixture only. At an

equimolar (0.025 molal) mixture of SRM's 1861c and 18611c, a pH(S) of 6.863 at 25°C is obtained. Directions also are furnished for the preparation of a physiological reference solution from 1861c and 18611c having a pH(S) of 7.415 at 25°C.

61
Type

Postassium acid phthalate Postassium dihydrogen phosphate \ Disodium hydrogen phosphate

f Borax

Postassium hydrogen tartrate Postassium tetroxalate Sodium bicarbonate I Sodium carbonate f Tris(hydroxymethyl)aminomethane » Tris(hydroxymethyl)aminomethane hydrochloride f

pH(S)(at 25 °C)

4.004

6.863

1

7.415/ 9.183

3.557

1.679

10.01

pD Standards These SRM's are furnished as crystals for preparation of solutions of known deuterium-ion concentration for the calibration and correction of pH indicating equipment to indicate pD data. SRM's 21861 and

2186II, and 2191 and 2192, are certified for use in admixtures only. SRM Type pD(S)

Values Wt/Unit

(grams)

21861

2186II

2191 2192

Potassium dihydrogen phosphates

| 7.43

| 10.74

o

©

o

o

Disodium hydrogen phosphate

J Sodium bicarbonate \ Sodium carbonate f

Ion-Selective Electrodes These SRM's are certified for the calibration of ion-selective electrodes and have conventional ionic

activities based on the Stokes-Robinson hydration theory for ionic strengths greater than 0. 1 mole per liter. SRM Type Certified Property Wt/Unit

(grams)

2201 2202

2203

Sodium Chloride pNa, pCl pK, pCl

125

160 Potassium Fluoride PF 125

Mechanical and Metrology Standards

Scanning Electron Microscope Standards These SRM's are for use in calibrating the magnification scale and for evaluating the resolution and

performance of an SEM. SRM 484b has spacings of 1, 2, 3, 5 and 50 mm and can be used to calibrate the magnification scale of an SEM from 1000 to 20,000 X to an accuracy of 5 percent or better. This standard

is a metallographic cross-section of alternate layers of electro deposited gold and nickel, encapsulated in copper-filled epoxy, and mounted within a section of stainless steel tubing. If the surface of this SRM were

etched by de sputtering, it would be useful for calibrating optical microscopes. SRM 469 is a small bead

(about 5 mm in diameter) of an aluminum-tungsten alloy that has a fine dendritic surface suitable for both

high and low resolution testing. This structure has high secondary electron emission, high contrast, and

spacings varying from about 20 to 200 nm. This bead is non-magnetic, vacuum clean, has no adverse reaction in the electron beam, needs no surface preparation or coating, and can be used repeatedly. Extracted

replicas of the dendritic structure have been used to test transmission electron microscopes (TEM).

62
SRM Type Spacings Size

469 484b SEM Resolution Test Specimen 0.02 to 0.2 mm

SEM Magnification Standard 1, 2, 3, 5 and 50 mm 6.5 X 11 mm tube

Optical Microscope Linewidth-Measurement Standard

This SRM is for use in calibrating optical microscopes used to measure the widths of opaque lines and

clear spaces on integrated-circuit photomasks. It can also be used to calibrate line spacings and line-to- space ratios. The accuracy of a measured linewidth or line spacing on SRM 474 is ± 0.05 mm or better. Recommended procedures are provided with each SRM for the adjustment and calibration of measurement

systems using transmitted illumination, including filar, image shearing, and video micrometer. SRM 474 is an anti-reflective chromium photoplate on a borosilicate glass substrate. This SRM is not recommended for use with partially transmitting materials or in reflected light with opaque materials and it should not be

used in a scanning electron microscope. SRM Type Spacings Size

474 Linewidth Measurement Standard 0.5 to 10 mm 6.4 X 6.4 X 0.2 cm.

Coating Thickness Standards These SRM's have a specimen size of 3 X 3 cm and are for calibrating coating thickness gages of the magnetic type for the measurement of thickness of nonmagnetic coatings on steel, nickel on steel, or nickel on nonmagnetic substrates. The steel substrates have the magnetic properties of AISI 1010 steel and the

nickel coatings have the magnetic properties of an annealed, Watts nickel electrodeposit free of cobalt and

iron.The magnetic type thickness gages are often used to measure the thickness of paint and other organic

coatings on steel, as well as zinc (galvanized) and other nonmagnetic metallic coatings. The number of

different thicknesses required for these calibrations depends on the type of gage and the coating thicknesses

to be measured. The magnetic type thickness gages can be used to estimate magnetic properties of austenitic stainless

steel weld metal. Because the magnetic properties of the weld metal are closely related to the ferrite content of the weld, these instruments are used to estimate the ferrite content. For these measurements, the coating thickness SRM 1370a is used to calibrate the instrument. The ferrite contents having magnetic

properties similar to those of the various coating thickness SRM's have been established by other

laboratories. SRM's with gold and tin coatings on various substrates have a specimen size of 15 X 15 mm and are

for calibrating coating thickness gages of the beta-backscatter type and for calibrating x-ray fluorescence methods for the measurement of the weight per unit area of gold or tin coatings. The gold coating standards were measured by beta-ray backscatter and x-ray fluorescence techniques

relative to NBS gold coating materials for which the average weights per unit area were determined by

weight and area measurements. They are suitable for the direct calibration of equipment used to measure

weight per unit area of gold coating of equivalent purity. From the density and weight per unit area, the instruments can be calibrated in terms of the thickness of the standard. For the tin coating standards, x-ray fluorescence techniques were used to measure the thickness of the

tin coating relative to NBS tin coating material for which the average weights per unit area were deter- mined by weight and area measurements.

63
ASTM Methods of Measuring Coating Thickness

Test:Instrumental methods of measuring coating thickness are set forth in the following ASTM Methods of B244 Measuring Thickness of Anodic Coatings on Aluminum with Eddy-Current Instruments. B487 Measurement of Metal and Oxide Coating Thicknesses by Microscopical Examination of a Cross Section. B499 Measurement of Coating Thicknesses by the Magnetic Method: Nonmagnetic Coatings on

Magnetic Basis Metals. B504 Measuring the Thicknesses of Metallic Coatings by the Coulometric Method. B530 Measurement of Coating Thicknesses by the Magnetic Method: Electrodeposited Nickel Coatings on Magnetic and Nonmagnetic Substrates. B567 Measurement of Coating Thickness by the Beta Backscatter Method. B568 Measurement of Coating Thickness by X-Ray Spectrometry. E376 Recommended Practice for Measuring Coatings on Thickness by Magnetic-Field or EddyCurrent (electro-magnetic) Test Methods. D1186 Measurement of Dry Film Thickness of Nonmagnetic Organic Coatings Applied on a Magnetic Base. D1400 Measurement of Dry Film Thickness of Nonmetallic Coatings of Paint, Varnish, Lacquer, and Related Products Applied on a Nonmagnetic Metal Base. G12 Nondestructive Measurement of Film Thickness of Pipeline Coatings on Steel. Nonmagnetic Coating on Magnetic Substrate (Copper and Chromium on Steel).

Nominal Coating Thickness- micrometer milliinch (mil)

1301a

1302a

1303a

1304a

1305a

1306a

1307a

1308a

1310a 1311a

1312a

1313a

1314a 1351a

1363a

Set of 4

Set of 4

Set of 4

Set of 4

Set of 4

Set of 4

Set of 4

Set of 4

Set of 4

Set of 4

Set of 4

Set of 4

Set of 4

Set of 4: 2 each

Set of 4

Set of 4

Set of 4

2.5 6

1220

2540

50

65

140 200

250 400

5040

6

12 2550

140 200

250 400

500

650

0.10

.24

.5.8 1.0

1.6 2.0 2.6

3.1

5.5 7.9

9.8 16

2.0

5.5 0.24

.5 1.0 2.0

1.6

3.1 5.5 7.9 9.8 1620

26

64
SRM Unit Size Nominal Coating Thickness

micrometer milliinch (mil)

1364a Set of 4 820 32 1000 39 1500 59 2000 79 1370a Set of 8 200 7.9 250 9.8 400 16 500 20 650 26

820 32 1000 39 1500 59

Magnetic Coating on Magnetic Substrate (Nickel on Steel)

SRM Unit Size Nominal Coating Thickness micrometer milliinch (mil)

1352a Set of 4: 2 each 9 0.35 20 .8 1353a Set of 4: 2 each 25 1.0 60 2.4 1365a Set of 4: 1 each 3 0.1 9 .4 15 .6 20 .8 1366a Set of 4: 1 each 25 1.0 35 1.4 40 1.6 50 2.0

Magnetic Coating on Non-Magnetic Substrate (Nickel and Chromium on Brass) SRM Unit Size Nominal Coating Thickness micrometer milliinch (mil)

1367a Set of 4: 1 each 39

1625

0.12

.35

.6 1.0

Gold Coating on Glass Sealing Alloy—ASTM Designation F15; Fe-53, Ni-29, and Co- 17

SRM Unit Size Nominal

Coating Weight (mg/cm 2

)

Nominal Coating

Thickness micrometer microinch

1398a Set of 4: 1 each 1.5 0.8 30

3.0 1.5 60

6.0 3 120

14.0 7 280

65
Gold Coating on Nickel

SRM Unit Size Nominal

Coating Weight (mg/cm 2

)

Nominal Coating

Thickness micrometer microinch

1384a

1399a

Set of 4: 2 each 1.5 3.0

1.5 3.0 6.0

17.0

0.8

1.5

0.8

1.5 39

3060

3060

120 350

Set of 4: 1 each

Gold Coating on Copper-Clad, Glass-Epoxy Laminate

SRM Unit Size Nominal

Coating Weight (mg/cm 2

)

Nominal Coating

Thickness micrometer microinch

2308a Set of 4: 1 each 1.5 3.0 6.0

14.0

0.8

1.5 37

3060

120 280

Gold Coating on Copper

SRM Unit Size Nominal

Coating Weight (mg/cm 2

)

Nominal Coating

Thickness micrometer microinch

2318a Set of 4: 1 each 1.5 3.0 6.0

14.0

0.8

1.5 37

3060

120 280

Tin Coating on Steel

SRM Unit Size Nominal

Coating Weight (mg/cm 2

)

Nominal Coating

Thickness micrometer microinch

2338a

2339a

Set of 4: 2 each 2.0 12.0

1.1 3.0

5.0 14.0

2.8 16.5

1.5 4.1 719

110 650

60

160 280

750

Set of 4: 1 each

66
Glass Standards

Type

Soda-lime-silica

Borosilicate

Lead-silica, for dc resistivity Lead-silica glass A

Borosilicate glass B

Extra dense lead Soda-lime silica glass-type 523/586

Lead-silica glass-type 617/366 Mixed alkalai lead silicate glass, V* in patties (6 pes.) Dense barium crown 620/603 glass, 1 % in diam X % in thick gobs (4 pes.) Alkaline earth alumina silicate glass, Vi in diam cane (16 pes—6 in long)

Alkalai-free aluminosilicate glass, Vi in diam cane (13 pes—6 in long) Neutral (borosilicate) glass, Vz in diam cane (6 pes—6 in long)

Borosilicate glass, 4.2 cm X 4.2 cm X 12.5 cm bar

Soda-lime-silica, for liquidus temperature, 2.5 X 2.5 X 0.6 cm

2.2 kg.

2.2 kg. 200 g. 625 g. 275 g. 500 g. 2 lb. 3 lb. 0.5 lb.

.5 lb. .5 lb. 200 g 250 g. 500 g. 60g.

Chemical Resistance (Durability) of Glass These SRM's are certified for use in checking test methods and for calibrating equipment used to de- termine the resistance of glass containers to chemical attack. The values given in the table represent the volume of fiftieth-normal sulfuric acid used to titrate to the methyl-red end point the alkaline extract from

a crushed sample of glass after exposure to high-purity water at 121 °C.

SRM Type mL of N/

50 H2 S04

622 7.67 623 0.34

Electrical Volume Resistivity This SRM is certified for use in checking test methods and for calibrating equipment used to deter- mine the dc volume resistivity of glass in accordance with ASTM C 657-72. SRM Type Logio Electrical Volume Resistivity Temperature, °C

624 Lead-silica 11.07 n-cm 250

300 350

9.88 ft-cm

8.88 fl-cm

Glass Viscosity Standards SRM's 710, 711, and 717 are furnished as rectangular-shaped bars, and are certified for viscosity be- tween values of 102 and 10 12 poises. They are furnished to check the performance of high-temperature

viscosity equipment (rotating cylinders) and low-temperature viscosity equipment (fiber elongation, beambending, parallel-plates, etc.)

67
Temperature (°C) at Viscosity (poises) 102 103 104 105 106 107 108 10" 1010 10" 1012

710 1434.3 1181.7 1019.0 905.3 821.5 757.1 706.1 664.7 630.4 601.5 576.9 711 1327.1 1072.8 909.0 794.7 710.4 645.6 594.3 552.7 518.2 489.2 464.5 717 1545.1 1248.8 1059.4 927.9 831.2 757.1 698.6 651.1 611.9 579.0 550.9

Glass Viscosity Fixpoints

Type of Glass Softening

Point °C

Annealing Strain Point °C Point °C

Extra Dense Lead

Soda Lime-Silica

Lead-Silica

Alkali Lead Silicate Dense Barium Crown

Alkaline Earth Alumina Silicate Alkali-Free Aluminosilicate Neutral

Borosilicate

384 724

602

528

738 908

961 794

720

328 546

432

386

631 710

764

574

516

Relative Stress Optical Coefficient Three glasses have been certified for relative stress optical coefficient. These glasses will be used to check calibrations of instruments to measure this property, especially by the methods of test proposed by

ASTM C770-73T. The glasses are in rectangular-shaped bars. SRM Type of Glass Relative Stress Optical Coefficient at A. = 546.1 nm

708

709

Lead-Silica Glass A C= 2.857 Brewsters, 10"' smVN

Glass B C= 3.652 Brewsters, 10" 12m2/N C= -1.359 Brewsters, 10-" 12m2/N

Borosilicate Extra Dense Lead

Glass Liquidus Temperature

This SRM is certified for use in checking test methods and for calibrating equipment used to deter- mine the liquidus temperature of glass by the gradient furnace methods in accordance with ASTM C829-

76.SRM Type Temperature, °C

773 Soda-lime-silica 990

68
Elasticity Standards This SRM is polycrystalline alumina prepared from a single block of material by isostatically cold

pressing and then sintering alumina powder containing 0.1 percent magnesium oxide. It is intended for the

calibration of apparatus used in the measurement of resonance frequencies from which elastic moduli are

calculated. Each bar has been individually measured and calibrated, and all surfaces were machined flat and parallel. SRM Type Size

718 Polycrystalline Alumina 12.7X1.27X0.32 cm

Density Standards SRM's 211c and 217c are certified for density (air saturated at 1 atm) at 20, 25, and 30° C; and may be

used to calibrate pycnometers and density balances. [See also, Refractive Index, page 77, and Combustion

Calorimetric Standards, page 71.] SRM Type Density 20° C

(g/mL) Amount, mL

211c

217c-5 Toluene 0.8670.692 IN PREPIN PREP

Polymer Standards These materials are certified for the properties indicated in the table, such as weight and number aver- age molecular weight, molecular weight distribution, limiting viscosity numbers (intrinsic viscosities) in several solvents, density, and melt flow. These SRM's have wide application not only in the calibration of instruments used in polymer characterization, such as light scattering photometers, osmometers, gel permeation chromatographs, but also wherever a well characterized polymer material is needed, as for example in studies of dilute solution behavior, rheology, and polymer crystal physics. SRM 1475 is accompanied by a series of papers, reprinted from the Journal of Research of the National Bureau of Standards, which describe how the measurements were obtained.

Type Wt/Unit

(grams)

705

706

1475 1476

1478

1479

1482 1483

1484

Polystyrene, narrow molecular weight distribution, Mw ~ 179,000, Mw/Mn 1.07 Polystyrene, broad molecular weight distribution, Mw ~ 258,000, Mw/Mn ~ 2.1 Polyethylene, linear, Mw ~ 52,000, Mw/Mn ~ 2.9 Polyethylene, branched

Polystyrene, narrow molecular weight distribution, Mw ~ 37,000, Mw/Mn ~ 1.04 .. Polystyrene, narrow molecular weight distribution, Mw ~ 1,100,000 Polyethylene, linear, Mw ~ 13,600 Polyethylene, linear, Mw ~ 32,100 Polyethylene, linear, Mw ~ 119,600

69
The following table lists the properties (and method) certified for these SRM's.

Property Method 705 706 1475 1476 1478 1479 1482 1483 1484

Molecular Weight:

(Light Scattering) X

X

XX X X X X X

Number Average

(Sedimentation Equilibrium) X

(Gel Permeation Chromatography- GPC).

(Osmometry) X X X X X X

Molecular Weight Distribution . (GPC) X(GPC) X

(Capillary Viscometer) X

Toluene 25° C

Benzene 25° C X

X

X

X

Benzene 35° C X

1-Chloronaphthalene 130° C X

X

X

XX

X

XX

X

X

X

X

X

X

X

X

1,2,4-trichlorobenzene 130° C X

Decahydronaphthalene 130° C

Melt Flow (ASTM)

Density (ASTM)

Heat Capacity (Adiabatic) X

Rheology Standard This SRM is intended for the calibration and checking of instruments used in polymer technology and

science for the determination of rheological properties of polymer melts or solutions. It is certified for Rate

of Shear, Viscosity, and First Normal Stress Difference at 25° C. SRM Type Unit size

1490 Polyisobutylene Solution in Cetane 250 mL

Heat Standards These SRM's are intended to relate heat and temperature measurements made in industrial, university, and government laboratories with the International Practical Temperature Scale-1968. 1

Superconductive Thermometric Fixed Point Devices Each device is composed of five small cylinders of high purity material mounted in a threaded copper

stud and enclosed by a mutual inductance coil set. They should prove particularly valuable to users of

3 He-4 He dilution refrigerators, in which direct calibrations on the liquid helium vapor pressure-temperature scales are difficult, and to those who wish to determine the temperature reproducibility of physical phenomena or of cryogenic equipment. SRM Type Material Nominal

Temperature (K)

767a Superconductive Thermometric Fixed Point Device Lead 7.2 Indium 3.4 Aluminum 1.2 Zinc 0.8 Cadmium .5 768 Superconductive Thermometric Fixed Point Device (Low) Gold-Indium .205 Gold-Aluminum .157 Iridium .098 Beryllium .024 Tungsten .015

1 "International Practical Temperature Scale of 1968," Metrologia, 5, 535-44 (1969).

70
Freezing Point Standards

Defining Fixed Points—International Practical Temperature Scale These SRM's are of such purity that they are suitable for defining fixed points for the International

Practical Temperature Scale of 1968. SRM Type Temperature °C Wt/Unit

(grams)

740

741 419.58 231.9681 350

Tin 350

Determined Reference Points These SRM's are intended for use in calibration of thermometers, thermocouples, and other temperature measuring devices. The temperatures certified are in accord with the International Practical Temperature Scale of 1968. SRM Type Temperature °C Wt/Unit

(grams)

42g

43h

44f 45d

49e

743

Tin 231.967

*419.58

660.3

1084.8 327.493 -38.841

350

350

200 450

600

680

Zinc Aluminum

Lead Mercury *SRM 43h is less pure than SRM 740 and has a freezing point 0.001 °C lower. Melting Point Standards SRM Type Temperature °C Wt/Unit

(grams)

742

1968 Alumina, 99.9 + % 205329.7723

10 Gallium, 99.9999 + % 25

1 "International Practical Temperature Scale of 1968," Metrologia, 5, 535-44 (1969).

Calorimetric Standards These SRM's are intended to relate the gain or loss of energy and work experienced during a chemical reaction or by change of temperature to the units of energy and work as defined by the National Measurement System. This system uses the units prescribed by the International System of Units (SI). The unit for energy and work under this system is the joule, which is related to the calorie by the equation: 4.184

joule = 1 calorie. Combustion Calorimetric Standards SRM Type Unit amount

39i Benzoic acid, 26.4 absolute kilojoules/gram. .. 30 g

217c-5 2.2.4-Trimethvlnentane IN PREP

71
Solution Calorimetric Standards SRM Type Wt/Unit

(grams)

724a

1654

1655

50

25 IN PREP

Heat Source Calorimetric Standards

Type Wt/Unit

(grams)

Zirconium-barium chromate heat source powder (ca 350 cal/g) Zirconium-barium chromate heat source powder (ca 390 cal/g) Zirconium-barium chromate heat source powder (ca 425 cal/g)

Enthalpy and Heat Capacity Standards SRM Type Range K Unit Size

705 Polystyrene, powder 10-350 5g. 720 Sapphire, synthetic (A1203 ) 0-2250 15g. 729 Graphite, rod 300-2500 10 cm X 0.64 cm D. 781-D1 Molvbdenum. sintered rod 273.15-2800 10 cm X 0.32 cm D. 781-D2 Molvbdenum. sintered rod 273.15-2800 10 cm X 0.64 cm D.

782 273-1200 10 cm X 0.32 cm D.

1475 Polvethvlene. nowder 5-360 50g.

Vapor Pressure Standards These SRM's are intended for use in the testing and calibration of vapor pressure measurement apparatus and techniques. SRM Type Pressure Range

(atmosphere) Temperature Range

(K)

Unit Size

745 746

748

Gold 10"3 to 10"8 10-" to 10" 11 10"3 to 10" 12

1300-2100 350-594 800-1600Wire 1.44 mm X 152 mm. Rod 6.4 mm X 64 mm.

Rod 6.4 mm X 64 mm.

Cadmium

Silver

Conductivity Standards This SRM is intended for use in calibrating eddy current devices for measuring the electrical conductivity of metals. SRM Type Conductivity, %IACS

1456 Set of 4 aluminum alloy blocks, 4.5 X 4.5 X 1 cm 29,41,48 and 60

72
Resistivity Standards These SRM's are intended for use calibrating instruments used to measure the electrical resistivity of

silicon wafers using both four-probe and eddy current methods. SRM Type Unit of Issue

1521 Boron Doped Silicon, 0.1 and 10 fi'cm Set of 2 wafers

1522 Phosphorous Doped Silicon (Power Device Level). 25.80, and 180 H«cm Set of 3 wafers

1523 Boron Doped Silicon (Eddy Current Tester). 0.01 and 0.9 CI -cm Set of 2 wafers

Thermal Conductivity and Electrical Resistance Standards These SRM's cover the high, medium, and low conductivity ranges. They will be useful for intercomparing thermal conductivity apparatus, debugging new apparatus, and calibrating comparative apparatus. SRM Type Temperature Range (K) Diameter (mm) Length (mm)

1465 Tungsten, sintered 4-3000 3.2 50

1466 Tungsten, sintered 4-3000 6.4 50

1467 4-3000 8.3 50

1468 Tungsten, arc-cast 4-3000 10.2 50

1469 Tungsten, arc-cast 4-3000 12.7 50

1463 Electrolytic Iron 4-1000 6.4 305 1464 4-1000 31.8 152 1460 Stainless Steel 5-1200 6.4 50

1461 Stainless Steel 5-1200 12.7 50

1462 Stainless Steel 5-1200 34 50

Thermal Expansion Standards These SRM's cover the temperature range from 20 to 2000 K having coefficients of thermal expansion over the range of 0.5 to 17 X 10"6 K. SRM Type Temperature Range (K) Diameter (mm) Length (mm)

731-L1 Borosilicate Glass 80-680 6.4 51 731-L2 Borosilicate Glass 80-680 6.4 102 731-L3 Borosilicate Glass 80-680 6.4 152 732 Sapphire 293-2000 6.4 51 736a Copper (IN PREP) 20-800 6.4 51 737 Tungsten 80-1800 6.4 51 738 Stainless Steel 293-900 6.4 51 739-L1 Fused Silica 80-1000 6.4 51 739-L2 80-1000 6.4 102 739-L3 Fused Silica 80-1000 6.4 152

73
Thermocouple Material* These SRM's are intended to serve as a convenient mechanism for the comparison of manufactured

wire to standard reference thermocouple tables. SRM Type Form

733

1967

Silver-28 Atomic Percent Gold

Platinum, High-Purity (99.999 + %)

Wire: 32AWG(0.2019 mm) diameter, 3 meters long. Wire: 0.51 mm diameter, 1 meter long.

Thermal Resistance Standards This SRM is intended for use in calibrating, and verifying apparatus such as the guarded hot-plate (ASTM CI 77) and heat flow meter (ASTM C518) used to determine the thermal resistance of thermal

insulation materials. SRM Type Density Temperature Size

1450b

1451 Fibrous Glass Board (IN PREP)Fibrous Glass Batt -13 255-330 60 X 60 X 2.54 Smaller square can be supplied.

Magnetic Standards

Magnetic Susceptibility Standards These SRM's are intended for use in the calibration of instruments used to measure magnetic susceptibility. SRM Type Form/Unit

763-1 Aluminum Cylinder 3 mm diameter X 3 mm.

763-2 Aluminum Wire 0.5 mm diameter X 250 mm.

763-3 Aluminum Rod 6 mm diameter X 175 mm.

764-1 Platinum Cylinder 3 mm diameter X 3 mm.

764-2 Platinum Wire 0.5 mm diameter X 50 mm.

765-1 Palladium Cylinder 3 mm diameter X 3 mm.

765-2 Palladium Wire 0.5 mm diameter x 50 mm.

765-3 Palladium Sponge 1 gram

766-1 Manganese Fluoride Cube 3x3x3 mm.

Magnetic Moment This SRM is intended for the calibration of instruments used to measure magnetic moment. SRM Type Size

772 2.4 mm D.

74
Paramagnetic Resonance Standards This SRM is intended for use in electron paramagnetic resonance (EPR) measurements for determining the number of active paramagnetic centers in a test sample. This SRM consists of two pieces of synthetic ruby.

Optical Standards

Spectrophotometry Standards

Filters for Spectrophotometry and Luminescence The spectrophotometric SRM's are intended primarily for use in verifying the accuracy of the trans- mittance scale of spectrophotometers. The luminescence SRM provides relative emission spectra to deter- mine spectral responsivity and to verify the accuracy of spectrofluorimeters. All of these SRM's provide a means of interlaboratory comparison of data. Glass Filters, SRM 930D, consists of three neutral glass filters. The glass filters have transmittances of approximately 10, 20, and 30 percent. Each filter is individually calibrated and certified for transmittance and transmission density at wavelengths of 440, 465, 546.1, 590, and 635 nm. The 546.1 nm wavelength

coincides with the Mercury emission line. Liquid Filters, SRM 931b, are absorbance standards for use in ultraviolet and visible spectrophotometry. This SRM consists of 3 sets of 4 vials, each containing a blank solution and three solutions of differ- ent concentrations of an absorbing liquid. Each vial contains approximately 10 mL of solution. The net absorbances are certified for each concentration at wavelengths 302, 395, 512, and 678 nm.

Quartz Cuvette, SRM 932, is an all-quartz rectangulr parallelepiped cuvette designed to fit the holder

of conventional spectrophotometers. The distances between the parallel, optically-transparent windows are measured at 10 positions along the vertical axis. The cuvettes range in pathlength between 9.97 and 10.03 mm, and the inner surfaces of the opposite windows are parallel within ± 0.002 mm. Each cuvette is certi- fied for pathlength and parallelism of the windows to within ± 0.0005 mm.

Potassium Dichromate, SRM 935, consists of crystalline potassium dichromate of established purity certified for use as an ultraviolet absorbance standard. Solutions made with this SRM in 0.001 N perchloric

acid are certified for their apparent specific absorbances, ea , at 23.5°C and wavelengths of 235, 257, 313,

345, and 350 nm.

Quinine Sulfate Dihydrate, SRM 936, consists of powdered quinine sulfate dihydrate of known purity

certified for use as a spectrofluorimetric emission standard. A solution made with this SRM in 0. 1 N perchloric acid is certified for its molecular emission spectrum, E(A) at 25.0°C over the wavelength range of

375.0 to 675 nm. Didymium-Oxide Glass Filters, SRM's 2009, 2010, 2013 and 2014, are wavelength standards for use in checking the wavelength scale of spectrophotometers between 400 and 760 nm for bandpasses between 1.5 and 10.5 nm. SRM's 2009 and 2010 were batch calibrated whereas SRM's 2013 and 2014 were individually

calibrated. SRM's 2009 and 2013 are approximately 1 cm wide by 3 cm high and are supplied in a holder which fits in the place of a standard analytical cuvette. SRM's 2010 and 2014 are in the form of squares approximately 5.1 cm by 5.1 cm.

75
Glass Filter, SRM 2030, consists of one neutral glass filter. It is intended as a reference source for onepoint verification of the transmittance and absorbance scales of spectrophotometers at a wavelength of 465 nm and a nominal 30% transmittance. Metal-on-Quartz Filters, SRM 2031, consists of three filters mounted in metal holders and an empty

holder, all holders are equipped with shutters. Two of the filters have an evaporated layer of semitransparent metal sandwiched between two quartz plates that have been assembled by optical contact. The third

filter consists of two clear quartz plates assembled by the same technique. Each filter is individually cali- brated at 250, 280, 340, 360, 400, 465, 500, 546, 590 and 635 nm.

Potassium Iodide, SRM 2032, consists of crystalline KI of established purity for use as a stray light standard in the ultraviolet. Aqueous solutions made with this material are certified for their specific absor- bance at 23.5°C over a wavelength range from 240 to 280 nm.

Potassium Iodide with Attenuator, SRM 2033, consists of the same material used for SRM 2032 plus a reference beam attenuator for extending the dynamic range of the stray light test. SRM Type Unit 930D

931c

932

935 936 2009 2010

2013 2014 2030

2031 2032

2033

Glass Filters for Spectrophotometry

Liquid Filters for Spectrophotometry

Quartz Cuvette for Spectrophotometry

Crystalline Potassium Dichromate for Use as an Ultraviolet Absorbance Standard

Quinine Sulfate Dihydrate Didymium-oxide glass Didymium-oxide glass Didymium-oxide glass Didymium-oxide glass Glass Filter for Transmittance Measurement

Metal-on-Quartz Filters for Spectrophotometry

Potassium Iodide for Use as a Stray Light Standard

Potassium Iodide with Attenuator for Use as Stray Light Standard

Set: 3 filters, 4 holders

Set: 12 vials

1 each

15 grams

1 gram

1 filter in holder

51 X 51 mm

1 filter in holder

51 X 51 mm

1 filter, 2 holders

Reflectance Standards These SRM's are intended primarily for calibration of the reflectance scale of integrating sphere re- flectometers used in evaluating materials for solar energy collectors and for calibration of reflectometers used in evaluating the appearance of polished metals and metal plated objects.

Specular Spectral Reflectance Standards SRM 2003a is a first-surface mirror of vacuum deposited aluminum on glass that is certified for near- normal reflectance over the wavelenth range of 250 to 2500 nm. SRM's 2023, 2024 and 2025 are secondsurface mirrors of vacuum deposited aluminum on a fused quartz plate and covered with a second plate of

fused quartz. These mirrors are also certified for near-normal reflectance from 250 to 2500 nm and for a few wavelengths at 15, 30, 45 and 60 degrees from normal. SRM 2025 has a small angle between the front and rear surfaces. SRM Type Size

2003a First Surface, Aluminum on Glass 5. 1 cm dia. 2023 Second Surface, Aluminum on Fused Quartz 5.1 X 5.1 cm

2024 2.5 X 10.2 cm

2025 2.5 X 10.2 cm

76
Directional-Hemispherical Reflectance Standards SRM's 2015 and 2016 are made from a white glass and are certified for near-normal reflectance from

400 to 750 nm. SRM's 2019 and 2020 are white ceramic tiles certified from 350 to 2500 nm. SRM's 2021 and 2022 are black porcelain enamel squares certified from 280 to 2500 nm. These last four SRM's are primarily certified for near-nomal reflectance but are also certified for reflectance at a few wavelengths at

15, 30, 45 and 60 degrees from normal. SRM Type Size

2015 2016

2019

2020

2021 2022

White Glass 2.5 X 5.0 X 0.64 cm

10 X 10 X 0.64 cm

5.1 X 5.1 X 0.81 cm

3.8 X 7.6 X 0.81 cm

5.1 X 5.1 X 0.20 cm

2.5 X 2.5 X 0.20 cm

White Glass White Ceramic Tile Black Porcelain Enamel

Black Porcelain Enamel

Refractive Index Standards SRM's 211c and 217c are certified for refractive index at 20, 25 and 30 °C, from 435.8 to 667.8 nm for seven wavelengths, and are available in 5 and 25 mL ampoules. SRM's 1820 and 1822 are certified for refractive index at thirteen wavelengths from 404.7 nm to 706.5 nm. These SRM's are designed for calibrating refractometers and certifying refractive index immersion liq- uids, and should provide a basis for accurate measurements of refractive index and dispersion. They consist of two rectangular glass slabs: one slab has polished faces and is to be used to check the performance of a refractometer; the second slab is unpolished and can be broken into fragments to certify the refractive index of immersion liquids by microscopic methods. SRM 1823 consists of two silicone liquids that are chemically and thermally stable. The liquids are

miscible and span the refractive index range of a variety of glasses and glass fibers that are examined microscopically by immersion techniques. Used independently, the liquids are suitable for the calibration of

refractometers. These liquids are certified for refractive index at ten wavelengths from 435.8 to 667.8 nm,

at temperatures of 20, 40, 60 and 80 °C. Type

211c Toluene

217c 2,2,4-Trimethylpentane 1820 Glass (Borosilicate) 1822 Glass (Soda-Lime)

1823-1 Silicone Liquid (I) 1823-11 Silicone Liquid (II)

1.497

1.391 1.488 1.518

1.518

1.559

Radioactivity Standards

Information concerning the SRM appears on it or its container. A Certificate containing pertinent in- formation on the SRM is sent under separate cover; a photocopy of the certificate is sent with the SRM.

Copies of these Certificates and information concerning the applications of these SRM's are available on

request to the NBS Office of Standard Reference Materials. These materials are shipped only by express or

air freight (shipping charges collect). The prices of SRM's may change as current stocks are depleted and

are replaced. Purchasers will be billed at the prices in effect at the time of shipment.

77
The stated accuracies of the older standards are, in general, an estimate of the standard deviation added to an estimate of maximum possible systematic error. The accuracies of more recent standards are based on the 99 percent confidence level of precision, with the same estimate of systematic error. The International Commission on Radiation Units (ICRU) recommended definition of the activity (A)

of a quantity of a radioactive nuclide is the quotient of AN by At, where AN is the number of nuclear

transformations that occur in this quantity, in time At: (A = AN/At). NBS has used the abbreviation ntps

for nuclear transfromation per second. In this list both ntps and dps are used: the latter when dps has been

used in certificates printed before 1968. 2 The terms: aps, fi~ ps, fi + ps, K-x-rays ps, yps are used for the emission rates of alpha particles, beta particles, positrons, K-x-rays, and gamma-rays, respectively. The SRM's listed below, not marked with an asterisk(*), may be ordered singly, without a license, under the general licensing provisions of the Atomic Energy Act of 1954. Those marked by an asterisk are

available only under the special licensing provisions of the Atomic Energy Act of 1954. NOTE: Certain radionuclides are not economical to maintain in stock because of short half lives or low demand. When sufficient demand exists, based on letters of inquiry, these materials are prepared and

those who have expressed interest are notified of their availability. If you need any radionuclides not listed, contact the Radioactivity Section, Room CI 14, Radiation Physics Building, National Bureau of Standards, Washington, D.C. 20234 (Telephone: 301-921-2668).

In addition, chemically stable solutions of most radionuclides, including those no longer issued by

NBS or that are currently out of stock, may be submitted to NBS for calibration as described in "Calibration and Related Measurement Services of the National Bureau of Standards," NBS Special Publication 250 (1980). Requests for these tests should be submitted, with full source information for approval of suit- ability, to the Radioactivity Section.

Alpha-Particle, Beta-Particle, Gamma-Ray, and Electron-Capture Solution Standards

Radionuclide Approximate activity, per gram, at time of

calibration (month/year)

Approx.

mass of

solution

(g)

Overall

uncertainty (%)

4229 4219B

4245 4246

4247

4925 4222

4223 4224 4233B*

4943 4422L* 4913B

4370B* 4926C

4927B

4947 4929C

4257*

4226

4331 4940B 4919D

Alumimum-26

Cadmium- 109 Carbon- 14(Na2 C03 in H20)

Carbon- 14(Na2 C03 in H20)

Carbon- 14(Na2 C03 in H20)

Carbon- 14(CsH5 COOH in C6 H5CH3 ) Carbon- 14(C 16H34 ) Carbon- 14(C I6 H34 ) Carbon-14(C,6H34 ) Cesium- 137

Chlorine-36 (NaCl)

Chlorine-36 (HC1)

Cobalt-60 Europium- 152 Hydrogen-3 (H20)

Hydrogen-3 (H20)

Hydrogen-3 (C6 H5 CH3) Iron-55 Manganese-54

Nickel-63 Plutonium-239 Promethium-147

Strontium-Yttrium-90

39

10s 4X105 4xl0< 4X102 2x10* 4x10* 4X103 4X102 IX 1015 atoms. (7xl05 s-'..

1 X 10* 08") 4X105 (/T) IN PREP

1.8X105 3 X 103 78X 105

1 X 105 2xl0« (k-x).... 6X105 2Xl0G 6(a) 5xl03 4.0X103

11/71 11/76 5/74

5/74

5/74

7/58

6/67

6/67

6/67

8/79

1962 1980

= 1.1 2.0

1.0 0.9

1.1 2.4

3.1

3.1

3.1 0.5

1.4 2.3

1.6 6/79

9/78

9/78

9/78 4/70

4/79

5/68

3/75 2/76

4/75

518

34

3.9

5

4.1 2

32.9

1.5 0.6

0.6

1.0 2.7 1.02

1.0 1.0

1.9 2.1

2 NBS now uses the SI (International System of Units) unit for activity, which is "1 per second," symbolized as s

'.

78
Alpha-Particle Standards These SRM's consist of a practically weightless deposit of the nuclide on a thin platinum foil cemented to a monel disk.

SRM Radionuclide Approx. a-particle-emission rate into lir geometry and/or approx. activity at time of calibration (month/year)

Overall uncertainty (%)

4904F

4907 4906B

Americum-241 10s to 6 X 103 s" 1 9/77

8/79

7/78

±1.3

0.7 to 1.6 0.7 to 2.2 Gadolinium-148 4 X 102 to 2 X 104 s" 1 Plutonium-238 30 to 5 X 104 s">

Contemporary Standard for Carbon- 14 Dating Laboratories SRM Material Description RM49 Oxalic Acid One-half pound of oxalic acid taken from specially prepared material

for use as a common contemporary standard against which world- wide measurements can be compared; no specific activity given; no

certificate issued.

Beta-Particle and Gamma-Ray Gas Standards These SRM's contain the radionuclide in the inactive gas at a pressure of about one atmosphere in a

glass break-seal ampoule.

Approximate activity, radioactivity Approximate Overall SRM Radionuclide concentration or emission rate at time of volume uncertainty

calibration (month/year) (mL) (%)

4302 4935C

4235 4308B

Argon-39 3.3 X 104 s"1 7/75 3/74

11/74

11/79

10

10

3 32.5

±1.5

0.9

1.2 3.1

Krypton-85 5 X 107 s" 1 per mole

Krypton-85 9 X 106 to 1.5 X 10 s _1 Krypton-85 1.6 X 106 s" 1 4309C Xenon- 127 IN PREP

Gamma-Ray "Point-Source" Standards This group of Standard Reference Materials is usually prepared by depositing the radioactive material and sealing it between two layers of polyester tape, mounted on an aluminum ring. Exceptions to this pro- cedure are americium, krypton, and thorium SRM's. The americium-241 SRM's, 4211 and 4213, are pre- pared by electroplating americium onto a 0.010-cm thick platinum foil, which is covered with a 0.005-cm

thick aluminum foil. The aluminum-covered source is sandwiched between two layers of 0.036-cm thick polyurethane film tape. The krypton-85 SRM, 4212, is prepared by sealing a krypton-85 impregnated alu- minum foil between two glass disks, with an epoxy adhesive. The thorium-228 SRM, 4206 (In Prep), is prepared by depositing and sealing the radionuclide between two layers of gold foil and this sandwich is then sealed between two double layers of polyurethane-film tape.

79
Radionuclide Gamma-ray

energy (MeV)

Approximate activity, s" 1

, at time of

calibration (except MRN) (month/

year)

4211 4213 4202C

4212 4200B

Americium-241

Americium-241 Cadmium- 109 Krypton-85 Cesium- 1 37—Barium- 1 37m

0.060

0.060

0.088

0.514

0.662

4.0 to 18 X 104 —2/70...

1.9 to 4.1 X 104 —2/70.

3 to 6 X 103 —11/76

6.5 to 36.5 X 106 —5/71

2.6 to 6.2 X 104 —9/79.

Gamma-Ray "Point-Source" Standards These SRM's are listed in order of ascending gamma-ray energy (except the 152 Eu).

Radionuclide Gamma-ray energy (MeV)

Approximate activity, s~\ at time of calibration (except MRN)

(month/year)

4207 420 IB •4997E

4240 4203C

499 1C 4996B *4218D

Cesium- 1 37—Barium- 1 37m

Niobium-94 Manganese-54

Bismuth-207

Cobalt-60 Sodium-22

Sodium-22 Europium- 152

0.662

0.702, 0.871 0.835

0.5696, 1.0634, 1.7697

1.173, 1.333 1.2745

1.2745 0.122—1.40

1.7 to 3.6 X 105 —9/79

4 to 6 X 103 —4/70

2 to 4 X 10s —4/79

5.4 to 11 X 104 —1/73

1.0 to 2.3 X 105 —2/73

6 X 104 —4/69

3 X 105 —4/69

4 X 104 to 5 X 105 —6/79

Low Energy Photon Sources These SRM's consist of a thin-layer deposit of the radionuclide on a thin stainless steel or platinum foil cemented to a monel disk. SRM Radionuclide Approx. emission rate at time of calibration (month/year)

Overall

uncertainty (%)

4262 4260BAmericium-241 IN PREP

Iron-55 1.0 X 10" to 1.9X 104 kxs"VSteradian—4/77.... ±1.8

Radium Solution Standards for Radon Analysis These samples are contained in flame-sealed glass ampoules. SRM Nominal Radium Content. Per Gram (Month/Year)

Approx.

Wt. Soln. (grams) Uncertainty (%)

4952B

495 1C 4950D

4953C

Blank Solution—8/76 20

10.4

10.3

10.3

±68

1.8

1.5

1.3

10-"—4/78 10-9—4/78 10-"—4/78

80
Radium Gamma-Ray Solution Standards These samples are contained in flame-sealed glass ampoules.

SRM Nominal Radium Content (jxg) (Month/Year)

Approxi- mate Mass

of Solution

(g)

Overall Uncertainty (%)

4956

4957

4958 4959

4960

4961 4962

4963 4964B

0.2—9/67 . 0.5—9/67 . 1.0—9/67. 2.0—9/67

.

5.0—9/67 . 10.0—9/67 . 20.0—9/67 . 50.0—9/67 . 102.0—6/65

Environmental Standards

SRM Form Radionuclides Approx. Mass

(g) RM45B River Sediment 4°K, 54Mn, 6°Co, 35 Zn, 9 °Sr, 9°Y, "7 Cs, >"Eu, 15 240Pu, "Fe, 125 Sb, '"Eu, 2°8T1, 212 Pb, 212 Bi, 214 Pb,

228Th( 224Th> 232Th) 23ipa( 2341^ 235TJ, 23 8U) 238 pu>

2

4 Eu, 228Ac,

214 Bi, "'Cm, a "Am.

39Pu,

26 Ra,

100

Metallurgical Standards SRM 493 is intended for calibration X-ray diffraction equipment to determine the relative amounts of

iron carbide in steel. SRM's 485a and 488 are intended for the calibration of X-ray diffraction equipment

used in determining the amount of retained austenite in ferrous materials. SRM Type Form

485a Austenite in Ferrite ~ 5% IN PREP.

486 Disk: 20.6 mm dia X 2.5 mm thick. 493 Spheroidized Iron Carbide (Fe3C) in Ferrite Wafer: 29X29X 2.4 mm.

Mbssbauer Standards These SRM's are issued for the calibration of the isomer shift of iron compounds and alloys and to provide a uniform basis for presentation of mossbauer isomer shift data SRM Type Form

1541 Iron Foil Foil: 2.5 cm X 2.5 cm X 23 urn.

81
X-ray Fluorescent Emission Target This SRM is intended for use in determining the detector window absorption in semiconductor x-ray spectrometers according to ANSI-IEEE Standard STO 759. When excited by a

55 Fe source this glass target will emit fluorescent x-rays in the range 1.0 to 5.2 keV. SRM Type Unit size

477 Glass Disk 2 X 25 mm D.

X-ray Diffraction Standards SRM's 640 and 674 are powdered materials to be used as internal standards for powder diffraction measurements. The lattice parameter of SRM 640 has been accurately determined at 25.0°C using a high

angle goniometer and the NBS tungsten internal standard. The use of SRM 640 will allow the results to be coupled to Powder Diffraction File (when converted to the same wavelength) base on the NBS internal standards of 1966. The weighted average of the lattice parameter, a, uncorrected for refraction is 5.43088 A and the standard error is estimated to be 3.5x10—5 A, SRM 674 is a set of five oxides for use in the

quantitative analysis (intensity measurement) of materials. Both peak height and integrated intensity of dif- fraction lines will be certified. SRM Type Unit size

640

674

10 g. Powder Diffraction Intensity IN PREP.

A1203 (a-alumina) CeO,

Cr203 TiOj (rutile) ZnO

Gas Transmission Standard SRM 1470 is for use in the measurement of the oxygen gas transmission rate using a volumetric method (ASTM D1434), manometric method (ASTM D1434 or ISO 2556), or coulometric method of measurement. The oxygen gas transmission rate of SRM 1470 is 0.325 pmol/m2/sec/Pa at 296. 16K and 0.1013 M Pa. SRM Type Unit size

1470 Polyester Plastic film for oxygen gas transmission 15 sheets; 23 cm square.

82
Permittivity Standards The three solution SRM's (1511, 1512, and 1513) are for calibrating cells and test capacitors used to determine the relative permittivity (dielectric constant) of liquids. The nominal dielectric constants (e) for SRM's 1511, 1512, and 1513 are: 2.0, 10.4, and 35.7, respectively. The three polymer SRM's (1516, 1517, and 1519) are for calibrating systems used to measure permittivity and related dielectric quantities. These SRM's are disks of a fluorinated ethylene-propylene copolymer and are individually calibrated. SRM Type Unit size

1511 1512 Cyclohexane 400 mL.

1 9-DirhlnrnptVianp 400 mL.

1513 400 mL.

1516 Permittivity 38 mm diameter 2.5 mm thick. 1517 38 mm diameter 5 mm thick. 1519 Permittivity 51 mm diameter 5 mm thick.

Reference Fuel Standards SRM's 1815 and 1816 are intended for use in maintaining the integrity of motor and aviation fuels as specified in the ASTM Manual for Rating Motor, Diesel and Aviation Fuels, Third Edition. SRM Type Unit

1815a

1816a n-Heptane IN PREP.Isooctane (2,2,4-Trimethylpentane) IN PREP.

Resistivity Standards SRM's 1460 through 1469 are certified for electrical resistivities over wide temperature ranges for use

in calibrating knife edge and similar electric resistivity apparatus. At room temperature these SRM's have

the following resistivities: Iron, 10-10-8 ft-m, Steel, 81-10-8 Cl-m, and Tungsten, 6-10-8 ft-m. SRM's 1521 and 1522 Boron-Doped Silicon, are both sets of two single-crystal wafers, with nominal

resistivities of 0.1 and 10 fl-cm, respectively. With the exception of thickness, these two SRM's are physically identical. They are intended for use in calibrating instruments used to measure the resistivity of sili- con wafers by four-probe method (ASTM Method F-84). SRM Type Unit of issue

1463 Rod 0.64 cm dia. X 5 cm long. 1464 Electrolytic Iron Rod 3.17 cm dia. X 5 cm long. 1460 Austenitic Stainless Steel Rod 0.64 cm dia. X 5 cm long. 1461 Austenitic Stainless Steel Rod 1.27 cm dia. X 5 cm long. 1462 Austenitic Stainless Steel Rod 3.4 cm dia. X 5 cm long. 1465 Tungsten, sintered 0.32 cm dia. X 5 cm long. 1466 Tungsten, sintered 0.64 cm dia. X 5 cm long. 1467 Tungsten, ARC-CAST 0.83 cm dia. X 5 cm long. 1468 Tungsten, ARC-CAST 1.02 cm dia. X 5 cm long. 1469 Tungsten, ARC-CAST 1.27 cm dia. X 5 cm long. 1521 Boron-Doped Silicon 2 Wafers 4.2 cm dia. X <0.74 mm thick. 1522 Silicon Power Device 3 Wafers 5.1 cm dia. X <0.64 mm thick.

83
ENGINEERING TYPE STANDARDS

These SRM's are intended to relate measurements used for production or quality control data to a

central point of reference. The values certified for these materials are in some cases empirical and do not

necessarily relate to the National Measurement System.

Standard Rubbers and Rubber-Compounding Materials These SRM's have been prepared to provide the rubber industry with standard materials for rubber compounding. They are useful for the testing of rubber and rubber-compounding materials in connection with quality control of raw materials and for the standardization of rubber testing. Each material has been statistically evaluated for uniformity by mixing rubber compounds and vulcanizing them in accordance with ASTM Designation D-15 and determining the stress-strain properties of the

resulting vulcanizates. Certificates are issued for the rubbers because the properties of different lots are not

the same. Replacement lots of rubber-compounding SRM's impart essentially the same characteristics to rubber vulcanizates so that Certificates are not issued for these SRM'S.

Standard Rubbers SRM Type Wt/Unit (grams) Pounds

385c 386h

388k

Natural (IN PREP) 31,400 69

Styrene-butadiene 1500 34,000 75 Butyl 37,000 81.5

Rubber Compounding Materials SRM Type Wt/Unit (grams) Pounds

370e 371g

372h

373f 374c 375g

378b

379 382a 384d

391

Zinc Oxide 8,000 17.6

13.2

7.1 4.4

4.4 61.6

61.6

12.1 70.6

7.1 5.5

Sulfur 6,000

Stearic Acid 3,200 Benzothiazyl disulfide 2,000 Tetramethylthiuram disulfide 2,000 Channel Black 28,000

28,000

5,500 32,000

3,200 25,000

Reference Magnetic Tapes These SRM's are intended for use in evaluating the performance of magnetic computer tapes and

maintaining control over their production. Each SRM is individually calibrated and certified. SRM Type Unit

1600 3200 3210

3216 6250

Secondary standard magnetic tape-computer amplitude reference Cassette. Secondary standard magnetic tape-computer amplitude reference Secondary standard flexible disk cartridge-computer amplitude reference Secondary standard magnetic tape-computer amplitude reference Secondary standard high density magnetic tape-computer amplitude reference

Reel/600 ft. Flexible disk. Cartridge. Reel/2400 ft.

84
Centerline Drawings for Optical Character Recognition-B Characters This SRM is an exact copy of the centerline drawings that uniquely define each printed character shape and size used in constant strokewidth Style B Optical Character Recognition (OCR-B) applications

in accordance with one or more of the following standards: American National Standard X3.49-1975, Character Set for Optical Character Recognition (OCR-B); Federal Information Processing Standards

Publication 32-1974, Optical Character Recognition Character Sets; European Computer Manufacturers

Association Standard ECMA-II for the Alphanumeric Character Set OCR-B for Optical Recognition, 3rd

Edition, 1975; and Draft International Standard ISO/DIS 1073/11, Alphanumeric Character Sets for Optical Recognition. This standard contains information on the nominal size, strokewidth, tolerance, and relative position of

characters. SRM Size OCR-B Characters

1901 I 118

Sizing Standards

Glass Spheres for Particle Size SRM Type Size (ixm) Sieve Nos. Wt/Unit

(grams)

1003 1004 1017a 1018a

1019a

Calibrated Glass Spheres 5-30 34-120

100-310 225-780 IN PREP

40-45

63

84

74

Calibrated Glass Beads 400-140

140-50

60-25

Calibrated Glass Beads

Calibrated Glass Beads

Glass Spheres

Turbidimetric and Fineness Standard (Cement) This SRM is available to calibrate the Blaine fineness meter according to the latest issue of Federal Test Method Standard 158, Method 2101 or ASTM Designation C204; to calibrate the Wagner turbidi- meter according to ASTM Designation CI 15; and to determine sieve residue according to ASTM Designation C430. Each set consists of twenty sealed vials, each containing approximately 10 grams of cement. This SRM is supplied only in sets of twenty vials or multiples thereof. SRM Type Certification Unit

114m Portland Cement Residue on No. 325 sieve, electroformed wet

method.

Surface area (Wagner turbidimeter) Surface area (Air-permeability) Mean particle diameter (Air-permeability)

Set of 20 vials.

Color Standards These SRM's are available to illustrate a characteristic color for each of the ISCC-NBS color-name

blocks in NBS Special Publication 440, COLOR: Universal Language and Dictionary of Names. SRM

2106 consists of 251 color chips on 18 constant-hue centroid color charts, and constitutes a supplement to SP 440. SRM 2107 combines SRM 2106 with SP 440 to form a complete color kit. The centroid colors

85
represent a systematic sampling of the whole color solid, each color of which has been carefully measured. Each centroid color has its own specification and can be used as a color standard. (NOTE: SP 440, may be purchased separately from the Superintendent of Documents, U.S. Government Printing Office, Washington, D.C. 20402.) SRM Type Unit of Issue

2106

2107

Centroid Color Charts Set: 18 Charts. Color Kit Set: SRM 2106 and SP 440.

Light-Sensitive Papers and Plastic Chips

Light-Sensitive Papers Standard light-sensitive paper and booklets of standard faded strips of this paper are available for use

in standardizing the dosage of radiant energy when testing textiles for color fastness by exposure in commercial carbon-arc fading lamps. The paper is distributed in units of 100 pieces 2% by 3Vi in. The booklet

contains six strips of the paper 1 xk in wide that have been faded by exposure in the NBS master lamp. A

copy of NBS Spec. Publ. 260-41, which describes the preparation and use of the materials, is furnished with each booklet. SRM Type Unit of Issue

700d Light-sensitive paper Pkg. of 100 pieces—2% in X 3Vi in. Booklet—6 strips 1 701d lA in wide.

Light-Sensitive Plastic Chips Standard light-sensitive plastic chips are available for use in calibration and standardization of artificial weathering and fading apparatus. These chips are distributed in two thicknesses (0.060 and 0.124 in) in units of five plates 2 in by 4Vs in, and have been standardized by the measurement of the change of trans- mittance as a function of exposure (in standard fading hours) to the NBS master lamps. SRM Type Unit of Issue

702 Package of 5 chips 0.124 in thick. 703 Package of 5 chips 0.060 in thick.

X-Ray and Photographic Standards SRM 1001 is a calibrated X-ray film step tablet of 17 steps that cover the optical density range from 0

to 4. SRM 1008 is a calibrated photographic step tablet of 21 steps that cover the optical density range from 0 to 4. Both step tablets are individually calibrated and certified for diffuse transmission density in conformance with conditions specified for American National Standard Diffuse Visual Transmission Density, Dt (90; 3000 K: < 10°; V), in "ANSI PH2. 19-1976, American National Standard for Diffuse and Doubly Diffuse Transmission Measurements (Transmission Density)." SRM 1010a, Microcopy Resolution Test Charts, is used to test the resolving power of cameras or of whole microcopying systems. SRM 1010a consists of five charts printed photographically on paper, and

86
have 26 high-contrast five-line patterns ranging in spatial frequency from one cycle per millimeter to 18 cycles per millimeter. Instructions for the use of the charts are supplied with each order. Type U it

1001 X-ray Flim Step Tablet (0-4) 1 tablet, 17 steps. 1008 Photographic Step Tablet (0-4) 1 tablet, 21 steps. 1010a Microcopy Resolution Test Chart Set of 5 charts.

Surface Flammability Standard SRM 1002c, Hardboard Sheet, is issued for checking the operation of radiant panel test equipment in accordance with the procedures outlined in ASTM Standard El 62-78. SRM Type Certification Unit of Issue

1002c Hardboard Sheet Flame Spread Index, 1—153 Set of 4: 6xl8x>/4 inch. Heat Evolution Factor, Q= 36.5

Smoke Density Chamber Standards These SRM's are certified for maximum specific optical density and are issued for performing operational checks of smoke density chambers. SRM Type Maximum Specific Optical Density Unit of Issue

1006a 1007a Non-flaming Exposure Condition (a-cellulose) Flaming Exposure Condition (plastic) Dm (corr.)-161 Dm (corr.)- 17850(0-132

3 sheets.

3 sheets.

Tape Adhesion Testing Standard

This material is intended as a uniform source of linerboard for use under ASTM Designation D2860,

Procedure A: Adhesion of Pressure Sensitive Tape to Fiberboard at 90 Degree Angle and Constant Stress. SRM Type Unit

1810 Linerboard for Tape Adhe- Package of 50 sheets. sion Testing.

87
RESEARCH MATERIALS

Research Materials (RM's) are in addition to and distinct from the Standard Reference Materials (SRM's) issued by NBS. The distinctions between Research Materials and Standard Reference Materials

are in the information supplied with them and purpose for which they are used. Unlike SRM's, the RM's

are not issued with Certificates of Analysis; rather they are accompanied by a "Report of Investigation," the sole authority of which is the author of the report. A Research Material is intended primarily to fur- ther scientific or technical research on that particular material. One of the principal considerations in issu- ing an RM is to provide homogeneous material so that an investigator in one laboratory can be assured

that the material he has is the same as that being investigated in a different laboratory. RM-1C Ultra-purity aluminum single crystal cubes (1 cm on a side) are intended for use in studies of a

variety of solid state phenomena for which both extreme purity and knowledge of crystallo- graphic orientation are required; e.g., in studies of electron spin resonance, De Haas-Van

Alphen effect, cyclotron resonance, and in a variety of studies relating to the Fermi surface and the transport properties of aluminum. RM-1R Ultra-purity aluminum polycrystalline rods (4.2 mm in diameter and 25.4 mm long) are intended for use in research on the mechanical and physical properties of extremely pure aluminum: e.g., in the determination of resistivity as a function of strain at cryogenic

temperatures to facilitate the design of cryogenic magnets or superconductor stabilizing elements. RM 5 Copper Heat Capacity Test Specimen. This Research Material is intended for the comparison

of heat capacity results from different laboratories and as a test specimen for heat capacity measurement below 25K, but it may also be useful at higher temperatures. It is available as a rod of high purity polycrystalline copper 19 mm (0.75 in) in diameter and 120 mm (4.75 in) in length. RM 31 Glass Fibers for Microanalysis (RM 31). This homogeneous vitreous solid contains known,

low-concentration additions of several elements which were developed for electron probe

microanalysis (EMPA) and secondary ion mass spectrometry (SIMS). This RM contains ten compositions of various oxides: in fiber form. RM 40 Polystyrene solution in a mixture of tri-cresyl-phosphate and Aroclor. This Research Material can be used to check instruments used in polymer technology and science for the determination of Theological properties of polymer melts or solutions. It was designed so that the

limiting viscosity is obtained at 25° C at shear rates as high as 1 reciprocal second. Values are given for rate of shear, viscosity, and first and second normal stress difference at 25° C. Unit

of issue: 250 mL. RM 45b Homogeneous River Sediment. This Research Material should be particularly useful for testing radiochemical procedures for the assay of radioactivity in sediments and soils. Unit of issue: 100 grams. RM 50 Albacore Tuna. This Research Material is intended to be used in the measurement of elements

present at trace concentration. It has been issued as a lyophilized (freeze-dried) marine

biological tissue sample in an attempt to satisfy many of the analytical requirements for a

base-line marine reference material. The Report of Investigation provides informational data

(not certified) on mercury, selenium, zinc, arsenic, lead, and a number of other elements of

interest to marine scientists. Unit of issue: two 35-g cans.

Phosphors These materials are issued without Certification. NBS Technical Note 417, Spectral Emission Properties of NBS Standard Phosphor Samples Under Photo-Excitation, is issued with these materials, and is

88
equivalent to the "Report of Investigation" issued with Research Materials. They are issued so that those

interested in developing methods of measurement for phosphor materials can work on a common source of

materials. NBS Technical Note 417 may be purchased from Superintendent of Documents, U.S. Govern- ment Printing Office, Washington, D.C. 20402, for 25 cents, by SD Catalog No. CI 3.46:47. SRM j

Wt/Unit

(grams)

1020 Zinc sulfide phosphor 14

1021 Zinc silicate phosphor 28

1022 Zinc sulfide phosphor 14 1023 Zinc-cadmium sulfide phosphor (AG acti- 14

vator). 1024 Zinc-cadmium sulfide phosphor (Cu acti- 14

vator). 1025 Zinc phosphate phosphor 28

SRM Type

Wt/Unit

(grams) 1026 Calcium tungstate phosphor 28 1027 Magnesium tungstate phosphor 28

1028 Zinc silicate phosphor 28 1029 Calcium silicate phosphor 14 1030 Magnesium arsenate phosphor 28

1031 Calcium halophosphate phosphor 28 1032 Barium silicate phosphor 28

1033 Calcium phosphate phosphor 28

89
SPECIAL REFERENCE MATERIALS

Special Reference Materials (GM's) are distributed by NBS to meet industry needs. These materials have been standardized either by some Government agency other than NBS, or by some standards-making body such as the American Society for Testing and Materials (ASTM), the American National Standards

Institute (ANSI), and the Organization for International Standardization (ISO). For this class of materials, NBS acts only as a distribution point and does not participate in the standardization of these materials. GM-1 Hydrogen in Steel Standards were produced and certified by the Welding Institute in Cambridge, England, and are distributed in the United States by NBS. GM-1 is a set of 15 cylinders, 5 each of HI, H2, and H3, containing nominally 0.05, 0.10, and 0.20 mL hydrogen,

respectively. The cylinders are 6.35 mm in diameter and about 30 mm long, weighing

approximately 6 grams. GM-2 Hydrogen in Steel Standards were produced and certified by the Welding Institute in Cambridge, England, and are distributed in the United States by NBS. GM-2 is a set of 15 cylinders, 5 each of H4, H5, and H6, containing nominally 0.20, 0.60, and 1.10 mL hydrogen,

respectively. The cylinders are 12.7 mm in diameter and about 30 mm long, weighing

approximately 22 grams. GM-5 Nickel and Vanadium in Residual Oil was produced and analyzed under the sponsorship of the Western Oil and Gas Association and the American Petroleum Institute, and is distributed by NBS. The assigned values for nickel and vanadium are 93 and 79 ppm, respectively. GM-5 is issued in 475 mL units. GM-6 This GM, DOT 6M Shipping Container, is manufactured in accordance with the applicable DOT specifications, the Nuclear Regulatory Commission Quality Assurance Program Requirements, and the National Bureau of Standards specifications. This container is to be used

in the transport of plutonium or all type B quantities of fissile or nonfissile radioactive

materials in special or non-special form. When plutonium materials are ordered from NBS, certified containers may be supplied by

customers or these GM's may be purchased from NBS. These containers may be reused for additional orders to NBS of subsequent materials. GM-21 Cellular Plastics. These GM's are to be used in comparison of fire research data. Each of these GM-57 GM's is shipped FOB: Gaithersburg, MD.

GM Type Density

(lb/ft 3

)

Thickness

(inches)

Size Width

(ft) Length

' (ft)

21 Flexible Polyurethane 2 6 2 2 23 Flexible Polyurethane, FR 2 6 2 2

25 Flexible Polyurethane, HR 4 6 2 2 27 Flexible Polyurethane, HR/FR 4 6 2 2 29 2 4 2 2

31 Rigid Polyurethane, FR>25 FS 2 4 2 2 35 4 6 2 2 37 Rigid Polyurethane, HR/FR 20 6 2 2 39 Rigid Polyurethane sprayed on Asbestos Cement Board, >25 FS 2 1.5 4 4 40 Rigid Polyurethane sprayed on Asbestos Cement Board, <25 FS 2 1.5 4 4

41 2 4 2 2 43 Rigid Trimer, -25 FS 2 4 2 2 47 1 4 2 2 49 Polystyrene Expanded, FR 1 4 2 2

51 Polystyrene Extruded 1 3 2 2

53 Polystyrene Extruded, FR 1 3 2 2 57 Phenolic Foam 2 4 2 2

90
Differential Thermal Analysis Standards GM's 754, 757, 758, 759, and 760 have been issued by NBS in cooperation with the International Confederation of Thermal Analysis as standards for calibrating differential thermal anaylsis and related ther- moanalytical equipment under operating conditions.

Material Peak Temp. (°C)

Polystyrene

1,2-Dichloroethane Cyclohexane:

(transition) (melting) Phenyl Ether

o-Terphenyl

Potassium Nitrate Indium

Tin

Potassium Perchlorate

Silver Sulfate Potassium Perchlorate

Silver Sulfate Quartz

Potassium Sulfate Potassium Chromate... Quartz

Potassium Sulfate Potassium Chromate... Barium Carbonate

Strontium Carbonate..

105 °C

.

-32 °C -83 °C + 7 X

30 °C... 58 "C...

128 °C.

157 "C.

232 "C.

300 °C

.

430 °C

300 °C

.

430 °C

573 "C.

583 °C.

665 °C

.

573 °C.

583 "C

665 "C

.

810 °C.

925 °C.

91
STANDARD REFERENCE MATERIALS TO BE DISCONTINUED

When the current supplies are exhausted, the SRM's listed below will be discontinued, because of limited user demand or technological obsolescence. SRM Type SRM Type

404a Steel, basic electric 817a Steel, B.O.H. 0.4C

405a Steel, medium manganese 820a Iron, ingot 407a Steel, chromium-vanadium 821 Steel, Cr-W, 0.9C

408a Steel, chromium-nickel 827 Steel, Cr-Mo (boron only) (SAE 4150) 409b Steel, nickel 837 Steel, special (Cr8-Mo2-W3-Co3)

413 Steel, A.O.H. 0.4C D837 Steel, special (Cr8-Mo2-W3-Co3)

414 Steel, Cr-Mo (SAE 4140) 840 Steel, special W high speed (Cr2-W13-Col2)

417a Steel, B.O.H. 0.4C D840 Steel, special W high speed (Cr2-W13-Col2)

418a Steel, Cr-Mo (SAE X4130) D841 Steel, W high speed (AISI-SAE-T1)

420a Iron, ingot 849 Steel, Cr5.5-Ni6.5 427 Steel, Cr-Mo (boron only) (SAE 4150) D849 Steel, Cr5.5-Ni6.5 436 Steel, special Cr6-Mo3-W10 850 Steel, Cr3-Ni25

437 Steel, special Cr8-Mo2-W3-Co3 D850 Steel, Cr3-Ni25

438 Steel, Mo high speed (AISI-SAE-M30) 1020 Zinc sulfide phosphor

439 Steel, Mo high speed (AISI-SAE-M36) 1021 Zinc silicate phosphor

440 Steel, special W high speed Cr2-W13-Col2 1022 Zinc sulfide phosphor

441 Steel, W high speed (AISI-SAE-T1) 1023 Zinc-cadmium sulfide phosphor (Ag activator) 442 Steel, stainless, Crl6-Nil0 1024 Zinc-cadmium sulfide phosphor (Cu activator) 443 Steel, stainless, Crl8.5-Ni9.5 1025 Zinc phosphate phosphor

444 Steel, stainless, Cr20.5-NilO 1026 Calcium tungstate phosphor

445 Steel, stainless, Crl3-Mo0.9 (Modified AISI 410) 1027 Magnesium tungstate phosphor

446 Steel, stainless, Crl8-Ni9 (Modified AISI 321) 1028 Zinc silicate phosphor

447 Steel, stainless, Cr24-Nil3 (Modified AISI 309) 1029 Calcium silicate phosphor

448 Steel, stainless, Cr9-Mo0.3 (Modified AISI 403) 1030 Magnesium arsenate phosphor

449 Steel, stainless, Cr5.5-Ni6.5 1031 Calcium halophosphate phosphor

450 Steel, stainless, Cr3-Ni25 1032 Barium silicate phosphor

803a Steel, A.O.H. 0.6C 1033 Calcium phosphate phosphor D803a Steel, A.O.H. 0.6C 1511 Cyclohexane, dielectric 804a Steel, basic electric 1512 1,2 Dichloroethane, dielectric 805a Steel, medium manganese 1513 Nitrobenzene, dielectric 807a Steel, chromium-vanadium 1516 permittivity std., 38 mm x 2.5 mm

D807a Steel, chromium-vanadium 1517 Permittivity std., 38 mm x 5 mm

808a Steel, chromium-nickel 1519 Permittivity std., 51 mm x 5 mm

92
OTHER SERVICES OF THE NATIONAL BUREAU OF STANDARDS

The following is a list of some of the services offered by NBS that may be of interest to SRM users. For general information see the entry on Technical Information and Publications.

Calibration and Related Measurement Services of the National Bureau of Standards The measurement services of the National Bureau of Standards include the calibration of standards,

test of instruments, and certain interlaboratory testing programs. These services are listed in NBS Special Publication 250, Calibration and Related Measurement Services of the National Bureau of Standards.

[Available from the Superintendent of Documents, U.S. Government Printing Office, Washington, D.C.

20402 (1980 edition) for $4.50]. These services are performed at the National Bureau of Standards Washington laboratories (Gaithers- burg, Md.) or the National Bureau of Standards laboratories in Boulder, Colorado. An abbreviated list of the services offered under this program is given below. For information concerning services not listed below or in Special Publication 250 contact: Office of Measurement Services National Bureau of Standards Washington, D.C. 20234

Telephone: (301) 921-2805

Washington Services

Acoustics (301) 921-3607 Aerodynamics (30 1 ) 92 1 -3684 Angular (301) 921-2216 Computer Science (general) (301) 921-3723

Density (301) 921-3681 Dosimetry in High-Energy Electron Beams (301) 921-2361

Electrical Instruments (AC) (301) 921-3121

Electrical Instruments (DC) (301) 921-2715

Engineering Tests (30 1 ) 92 1 -347

1

Flatness (301) 921-2216 Flow Rate Meters (301)921-3481

Fluid Quantity (301) 921-3681 Force Measurements (301) 921-3884 Gamma-Ray Sources (301) 921-2361 Humidity (301) 921-2794

Hydraulics (301) 921-2124 Image Optics (301) 921-3550 Impedance (301) 921-2715

Interlaboratory Testing Programs (301) 921 -2946 Length (301) 921-2216 Mass (301) 921-3681 Neutron Sources (301) 921 -2234 Photography (301) 921-3550

Photometric Calibrations (30 1 ) 92 1 -36 1

3

93
Precision Apparatus (30 1 ) 92 1 -27 1

Proving Rings (301) 921-3884

Radiation Thermometry (301) 921-3613

Radioactivity (301) 921-2665

Radiometric Calibrations (301) 921-3613

Resistance (301) 921-2715

Resistance Thermometers (30 1 ) 92 1 -2757 Roundness (301) 921-2216

Spectrophotometric Standards (301) 921-2453

Straightness (301)921-2216

Surface Texture (301) 921-2159 Thermocouples and Thermocouple Materials (301) 921-2069 Thermometers, Laboratory (301) 921 -2087

Ultraviolet Spectral Radiance Standard (301) 921-201

Vibration (301) 921-3607

Voltage, High (301) 921-3121 Voltage (301) 921-2715 Weights and Measure (30 1 ) 92 1 -240

X- and Gamma-Ray Measuring Instruments (301) 921-2361

Boulder Services

All measurement services available in Boulder should be directed to: Measurement Services Clerk

National Bureau of Standards

Boulder, Colorado 80303 Telephone: (303) 499-1000, ext. 3753 Cryogenics

Electromagnetics (Radio, Microwave, and Laser Frequencies)

1. Attenuation

2. Fields (Electromagnetic)

3. Impedance

4. Laser Parameters

5. Noise Temperature (Effective)

6. Phase Shift

7. Power

8. Voltage Time and Frequency Measurements

94
Standards Information Service The Standards Information Service (SIS) maintains a reference collection of some 240,000 engineering

standards issued by U.S. technical societies, professional organizations, and trade associations; State pur- chasing offices; U.S. civilian government agencies; and the major foreign national and international stand- ardizing bodies. The collection is open to the public Monday through Friday from 8:30 a.m. to 5 p.m. SIS publishes general and special indices of standards. Information services consist of responding to

inquiries by searching Key-Word-In-Context (KWIC) Indices to determine whether there are any published standards, specifications, test methods, or recommended practices for a given item, product, or material. Inquirers are referred to the appropriate source to obtain copies of standards. SIS neither sells nor

distributes standards.

Inquiries or requests for additional information should be directed to: Standards Information Service Room B162, Technology Building National Bureau of Standards Washington, D.C. 20234

Telephone: (301) 921-2587

Standard Reference Data The National Standard Reference Data System (NSRDS) is a nationwide program established to make

critically evaluated data in the physical sciences available to the technical community. It publishes compilations of critically evaluated data, critical reviews and bibliographies. A complete listing of the publications of the NSRDS is available from the Office of Standard Reference Data (OSRD). The OSRD re- sponds in a limited way to queries within the scope of the program by providing references, referrals, documentation, or data, as available. The program's bimonthly newsletter is available on request. Inquiries or requests for further information should be directed to: Information Services

Office of Standard Reference Data Reference Center Room A320, Physics Building

National Bureau of Standards Washington, D.C. 20234

Telephone: (301) 921-2228

Technical Information and Publications The Technical Information and Publications Division maintains a general correspondence and inquiry service on the technical activities of the National Bureau of Standards. Inquiries of a general nature and not covered by the services listed above should be directed to: Technical Information and Publications Division Room A617, Administration Building

National Bureau of Standards Washington, D.C. 20234

Telephone: (301) 921-2318

95
GUIDE FOR REQUESTING DEVELOPMENT OF STANDARD REFERENCE MATERIALS

The National Bureau of Standards has the function to develop, produce, and distribute Standard Ref- erence Materials (SRM's) that provide a basis for comparison of measurements on materials and that aid in the control of production processes. To perform this function, the Office of Standard Reference Materials

evaluates the requirements of science, industry, and government for carefully characterized reference materials, and directs their production and distribution. NBS currently has over 1000 SRM's available, about 100 new ones in preparation, and requests for the preparation of many others. In developing and NBS-SRM, the candidate material must meet one or more of the criteria listed below.

1. The SRM must permit users to attain more accurate measurements.

2. The production of the SRM elsewhere is not economically or technically feasible.

3. The SRM would be an industry-wide standard for commerce from a neutral source not otherwise

available.

4. NBS production of the SRM would provide continued availability from a common source for a highly characterized material that is important to science, industry, or government. NBS has recognized and responded to the need to enlarge the scope of the program to include all types of well-characterized materials that can be used to calibrate a measurement system or to produce

scientific data that can be readily referred to a common base. However, the demand for new SRM's greatly exceeds the Bureau's capacity to produce and certify these materials. Consequently, requests for new

SRM's that would have limited use, or for which the need is not very great, are deferred in favor of

requests that clearly show a critical need. To determine which requests are to receive top priority, NBS

needs and heavily relies upon the information supplied by industry, either through its own representatives or through interested organizations, such as the American National Standards Institute, American Nuclear

Society, American Petroleum Institute, American Society for Testing and Materials, etc. Accordingly, while the Bureau welcomes all requests for the development of new SRM's, both the Bureau and industry would be helped, if such requests are accompanied by information that will permit an

objective assessment of the urgency and importance of proposed new reference materials. Requests for the development of new Standard Reference Materials should include as much of the information listed below as possible.

1. Short title of the proposed Standard Reference Material.

2. Purpose for which the SRM would be used.

3. Reasons why the SRM is needed.

4. Special characteristics and/or requirements for the material. Include additional requirements and

reasons, if more than one SRM is necessary for standardization in this area.

5. Your estimate of the possible present and future (6-10 year) demand for such an SRM in your own

operations and elsewhere. (National and international estimates are very useful.)

6. Whether such an SRM, or a similar one, can be produced by, or obtained from a source other than NBS. If so, give reasons to justify its preparation by NBS.

7. Miscellaneous pertinent information to aid justification for the SRM, such as: (a) an estimate of the range of application, monetary significance of the measurement affected, and scientific and/or technological significance including, when feasible, estimates of the impact upon industrial productivity or growth, and (b) supporting letters from industry leaders, trade organizations, interested committees, and others.

96
CERTIFIED REFERENCE MATERIALS FROM OTHER SOURCES

Sources of certified reference materials (CRM's) are now world wide. Currently, no international cata- log exists, but the International Standards Organization (ISO), through its Council Committee on Refer- ence Materials (REMCO), is in the process of preparing such a catalog. Publication of this international catalog is still in preparation; inquiries should be directed to: Mr. M. Parkany

Secretary for REMCO

International Organization for Standardization

1, Rue de Varembe

Case Postale 56

1211 Geneva 20

Suisse, Switzerland

In the period 1972-1977, the International Union of Pure and Applied Chemistry (IUPAC) through its Commission on Physicochemical Measurements and Standards prepared and issued a catalog of CRM's

that are useful for the realization of physicochemical properties. The national laboratories that responded

to the request for such information were: COUNTRY NATIONAL LABORATORY

Australia Commonwealth Scientific and Industrial Research Organization National Standards Laboratory

University Grounds, City Road

Chippendale, NSW 2008

Australia Canada Canadian Certified Reference Materials Project C/O Mineral Sciences Laboratories, CANMET

Canada Centre for Mineral and Energy Technology

555 Booth Street Ottawa, Ontario K1A 0G1 Canada Germany (West) Bundesanstalt fur Materialpriifung Unter den Eichen 87, Dl Berlin 45

Federal Republic of Germany

The Physikalische-Technische Bundesanstalt Bundesalle 100, 33 Braunschweig

Federal Republic of Germany

Hungary National Office of Measures Nemetologyi ut 37-39, .sz. Budapest XII Hungary

97
Japan Standards Department Agency of Industrial Science and Technology

Ministry of International Trade and Industry

3-1, Kasumigaseki 1, Chiyodaku, Tokyo, Japan

(Cable address: Mitijisc Tokyo)

Netherlands Institute for Physical Chemistry TNO

Utrechtseweg 48, P.O. Box 108

Zeist The Netherlands Poland Division of Physico-Chemical Metrology

National Board for Quality Control and Measures

2, Elektoralna Street, Warsaw

Poland

United Kingdom National Physical Laboratory

Teddington, Middlesex England

The current IUPAC edition is: Physicochemical Measurements: Catalogue of Reference Materials from

National Laboratories, Revised 1976, Pure & Appl. Chem., 48, 503-414 (1976). Domestic (US) sources, of CRM's, including a large number of uncertified reference materials, are

listed in, Guide to United States Reference Materials, NBS Spec. Publ. 260-57 (Feb. 1978), U.S. Government

Printing Office, Washington D.C. 20402.

98
ALPHABETICAL INDEX

Page ACIDIMETRIC 44

Benzoic acid Potassium phthalate, acid ALLOYS CHEMICAL COMPOSITION

(See also individual metals) Aluminum

Chip form 31 Solid form 36 Wire (neutron monitor density) 60 Cobalt Wire (neutron monitor density) 60 Copper

Chip form 31 Microprobe 42

Solid form 37 Ferro (steelmaking) 29 Gold

High-purity 41 Microprobe wire 42 High temperature

Solid form 27

IronChip and granular form 29 Microprobe 42

Solid form 30 Lead

Chip form 33 Solid form 39 Magnesium

Chip form 33 Molybdenum

Microprobe 42

Nickel Chip form 34 Oxides 34

Solid form 40

Platinum 41 Doped, wire

High-purity, wire Selenium 35 Granular form

Silver 42 Microprobe

Solder Chip form 33

Solid form 39 TinChip form 35 Titanium Chip form 35 Solid form 40

Gas-in 41 Tungsten 42 Microprobe

Spelter 40

ZincChip form

High-purity 41 Solid form.. 40 Zirconium Chip form 36

Solid form 41 ALUMINUM

Al-Co alloy (neutron density monitor wire) 60

Al-Si alloy 31 "Benchmark" 36 Freezing point standard 71 Metallo-organic compound 52 Radioactivity 77 Wrought alloy 31 AMERICIUM

Radioactivity 77

AMMONIUM DIHYDROGEN

PHOSPHATE

Fertilizer ANALYZED GASES

(ENVIRONMENTAL) 47

Carbon dioxide in nitrogen Carbon monoxide in air Carbon monoxide in nitrogen Methane in air Methane-propane in air Nitric oxide in nitrogen Oxygen in nitrogen Propane in air Sulfur dioxide in nitrogen ANALYZED LIQUIDS AND SOLIDS (ENVIRONMENTAL) 48

Coal, sulfur in Coal, trace elements in Coal fly ash, trace elements in Fuel oil, trace elements in Mercury in coal Mercury in water

Permeation tubes 50

Sulfur in distillate fuel oil Sulfur in residual fuel oil Trace elements in water ARSENIC

Trioxide (oxidimetric value) 44 ASSAY STANDARDS

(See specific constituent) BARIUM

Metallo-organic compound 52 BASIMETRIC

Tris(hydroxymethl)aminomethane 44 BENZOIC ACID

Acidimetric 44

Calorimetric Microchemical 44 BERYLLIUM ON FILTER MEDIA 71 BIOLOGICAL STANDARDS 45

Brewers yeast Citrus leaves

Liver, bovine

Oyster tissue Pine needles Rice flour Tomato leaves Tuna, Albacore 89 Wheat flour BISMUTH

Radioactivity 77 BORON

Boric acid 61 Boric acid (B-10 enriched) 61 CADMIUM

Metallo-organic compound 52 Radioactivity 77 Vapor pressure 72 CALCIUM

Carbonate (clinical) 45 Chloride (ion selectivity) 62

Metallo-organic compound 52 Molybdate (steelmaking) 29 CALORIMETRIC 71

Combustion calorimetric Heat source

99
Page CANE SUGAR 44

(Sucrose) CARBIDES

Tungsten carbide 57 CARBON

Channel black (rubber compounding)

Conducting black (rubber compounding) Gas furnace black (rubber compounding)

Oil furnace black (rubber compounding) Carbon dioxide in nitrogen Carbon monoxide in nitrogen CARBON STEELS 18 CAST IRONS 29

Blast furnace Car wheel Chip form

Ductile Nodular Solid form White CAST STEEL 29 CELLULAR PLASTIC 91 CEMENTS

Portland (chemical composition) 57 Turbidimetric and fineness 85 CERAMIC MATERIALS

Carbides 57 Glasses 56 Minerals 55 Refractories 56 CERIUM

Radioactivity 77 CESIUM

Radioactivity 77 CHEMICAL STANDARDS

Primary 44 Acid potassium phthalate Arsenic trioxide Benzoic acid Boric acid Potassium chloride Potassium dichromate Sodium oxalate Sucrose Tris(hydroxymethyl)aminomethane Uranium oxide

Intermediate purity Selenium 35

Zinc..'. 36 CHLORINE

Isotopic reference 61 Radioactivity 77 CHROMIUM

Ferro (steelmaking) 29

Metallo-organic compound 52

Isotopic reference 61 Radioactivity 77

Refractories 56 CLAYS 55

Flint

Plastic CLINICAL LABORATORY

STANDARDS 45

Antiepilepsy drug level assay

Bilirubin Bovine serum albumin (powder) Bovine serum albumin (solution) Calcium carbonate

Cholesterol

Creatinine

Cortisol

Page Gallium melting point Glass filters for spectrophotometry D-Glucose

Iron metal Human serum Lead nitrate Liquid filters for spectrophotometry Lithium carbonate Magnesium gluconate D-Mannitol

Metals on quartz filters Potassium chloride Potassium dichromate

Quartz cuvette for spectrophotometry

Quinine sulfate dihydrate Sodium chloride Sodium pyruvate Thermometer, enzymology

Tris(hydroxymethyl)aminomethane Tris(hydroxymethyl)aminomethane HCL

Urea

Uric acid VMA COAL 49

Fly ash, trace elements in Mercury in Sulfur in Trace elements in COATING THICKNESS 63

Copper on steel Gold on copper Gold on copper-clad glass-epoxy laminate Gold on Fe-Ni-Co glass sealing alloy Gold on nickel Nickel on brass Nickel on steel Tin on steel COBALT

Metallo-organic compound 52

Radioactivity 77

See, Alloys COLOR STANDARDS 85 COPPER

"Benchmarks" (chips) 31 "Benchmarks" (solids) 38 Beryllium copper alloys 37

Brass Aluminum 37 Cartridge 37 Free cutting 37 Naval 37 Red 37 Sheet 32 Bronze Commercial 37 Leaded tin 32

Silicon 32 Coating thickness 63 Concentrate 52 Cupro-nickel (chips) 32 Cupro-nickel (solids) 37 Freezing point 71 Guilding metal 37

Isotopic reference 61 Linear thermal expansion 73 Metallo-organic compound 52 Microprobe (gold-copper wires) 42

Mill heads 53

Mill tails 53 Nickel silver alloy 32 DENSITY STANDARDS

Neutron density wire 60 Photographic 86 Smoke density, flaming 87

100
Page Smoke density, non-flaming 87

2,2,4-trimethylpentane 69 X-ray 86 DEXTROSE (Glucose) DIELECTRIC 83

Cyclohexane

1 ,2-dichloroethane Nitrobenzene DIFFERENTIAL THERMAL ANALYSIS. 91 ENVIRONMENTAL STANDARDS

Gases 47

Liquids 48

Radioactivity 81 Solids 48 ELASTICITY 69 ELECTRICAL RESISTIVITY .73, 83 FELDSPARS 55

Soda

Potash FERRO-(STEELMAKING ALLOYS) 29 Chromium

Niobium

Phosphorus

Silicon FERTILIZER

Ammonium dihydrogen phosphate 53 Phosphate rock 54 Potassium dihydrogen phosphate 53 Potassium nitrate 53 FILTERS 75

Glass for spectrophotometry

Liquid for spectrophotometry

Metal-on-Quartz FISSION TRACK GLASSES 53 FLAMMABILITY STANDARDS 87

Flame spread index (hardboard sheet) Smoke density, flaming Smoke density, non-flaming See also, Special Reference Materials FLUORINE IN URINE 51 FLUORSPAR 53

Assay

Geological FORENSIC STANDARDS 52

Glass, refractive index

Silicone liquids, refractive index FREEZE DRIED URINE 51

Fluorine Mercury FREEZING POINT STANDARDS 71

Defining fixed points Tin Zinc Determined reference points Aluminum

Copper

Lead Mercury

Tin

Zinc FUELS (see, environmental) 83

Isooctane n-Heptane GALLIUM

Melting point 71 GAS TRANSMISSION

Polyester plastic film for oxygen 82 GASES, ANALYZED 47

Carbon Dioxide in nitrogen Carbon monoxide in air

Page Carbon monoxide in nitrogen Methane in air Methane-propane in air Nitric oxide in nitrogen Nitrogen dioxide permeation device Oxygen in nitrogen Propane in air Sulfur dioxide in nitrogen

Sulfur dioxide permeation tubes GASES IN METALS 41 "GASOLINE"

Lead in 48

Fuel ratings 83 GEOLOGICAL 53

Fluorspar GLASS

Chemical composition 56

Filters for spectrophotometry 75

Fission track 60

Physical properties 67

Refractive index 77 Spheres for sieve calibration (sizing standards) 85

Stress-optical coefficient 67 Trace elements in 57 GLUCOSE (Dextrose)

Clinical 45 Primary chemical 44 GOLD

Coating thickness 63 on epoxy

on Fe-Ni-Co glass sealing alloy on nickel High-purity 41 Microprobe 42 Vapor pressure 72 HEAT STANDARDS 70

Calometric

Freezing points Melting points Superconductive fixed points Thermal conductivity Thermal expansion Thermocouple materials Vapor pressure HEAT SOURCE 72

Zirconium-barium-chromate HIGH-PURITY METALS 41

Gold, wire and rod

Platinum, wire Zinc HIGH TEMPERATURE ALLOYS 27 HYDROGEN

in steel (GM-1, GM-2) 90

in titanium 41 Radioactivity 77 INDUSTRIAL HYGIENE 51

Beryllium/filter Fluorine in urine Mercury in urine

Metals/filter Quartz/filter ION-ACTIVITY 61

Ion-selective electrodes pD standards pH standards IRON

Chip form 29

Clinical 45

Electrical resistivity 73, 83 Metallo-organic compound 52 Ores 54

Radioactivity 77

101
Page Solid form 30 Thermal conductivity 73, 83 IODINE

Radioactivity 77 ISOTOPIC REFERENCE STANDARDS. .. 61

Boron, natural Boron, enriched Bromine

Chlorine Chromium

Copper

Lead, equal atom (206/208) Lead, natural Lead, radiogenic, 92% lead-206 Lead-206, spike Magnesium

Plutonium Rhenium

Rubidium

Silicon Silver Strontium Uranium-233 spike Uranium-235, spike KRYPTON

Radioactivity 77 LEAD

Allnvs IV VJ

Page Trace element in urine 57 Trace element in water 49 MELTING POINTS 71 Alumina

Gallium METALLO-ORGANIC COMPOUNDS 52 Aluminum

Barium Cadmium

Calcium Chromium

Cobalt Copper

Iron Lithium Magnesium

Manganese

Nickel Phosphorus

Silicon Silver Sodium

Strontium Tin Vanadium

Zinc

Bearing metal 33, 39 Freezing point 71 Gasoline 48

Isotopic reference 61

Nitrate, clinical 45 Solder 33, 39 LIGHT SENSITIVE STANDARDS 86

Faded paper strips Light sensitive papers

Light sensitive plastic chips LIMESTONE 55

Argillaceous Dolomitic LINERBOARD FOR TAPE ADHESION

TESTING 87 LIQUIDS, ANALYZED

Lead in gasoline 48

Sulfur in residual fuel oil 48

Sulfur in distillate fuel oil 48 LITHIUM

Metallo-organic compound 52 Ores 53 LOW ALLOY STEELS

Chip form 18 Solid form 22 MAGNESIUM

Alloy 33 Gluconate, clinical 45

Isotopic reference 61 Metallo-organic compound 52 MAGNETIC

Susceptibility 74 Tape, computer amplitude reference 84 MAGNIFICATION STANDARD 62 MANGANESE

Fluoride, magnetic susceptibility 74

Metallo-organic compound 52 MARAGING STEEL 27 MERCURY

Freezing point 71 Radioactivity 77 Trace element in coal 49

METALLURGICAL STANDARDS 81

Austenite in ferrite Iron carbide in ferrite METALS

Alloys—see index entry Elements—see index entry Freezing points 71 Gas-in 41 High-purity 41 Melting points 71 Microprobe 42

Resistivity, electrical 83 Thermal conductivity 73 Vapor pressure 72 METALS IN OIL, WEAR 53 METALS ON FILTER MEDIA 51

Beryllium Cadmium

Lead Manganese

Zinc MICROCHEMICAL STANDARDS 44

Acetanilide

Anisic acid Benzoic acid o-Bromobenzoic acid m-Chlorobenzoic acid Cystine p-Fluorobenzoic acid Nicotinic acid Urea MICROCOPY RESOLUTION TEST

CHARTS 86 MICROPROBE STANDARDS 42

Cartridge brass Glasses for microanalysis 88 Gold-copper

Gold-silver Iron-3% silicon Tungsten-20% molybdenum

102
Page MINERALS 55

Clays

Flint

Plastic Feldspar Potash Soda

Limestone

Argillaceous Dolomitic Ores 53

Bauxite Copper

Fluorspar

Iron Lithium Molybdenum

Phosphate rock Tungsten

Zinc MOLECULAR WEIGHT 69

Polyethylene

Polystyrene MOLYBDENUM

Concentrate (ore) 53 Heat capacity 72 Microprobe 42 MOSSBAUER STANDARDS 81 NEUTRON DENSITY MONITOR WIRE

Cobalt in aluminum 60 NICKEL

Alloys Chip form 33

Solid form 40

Coating thickness 63 on brass on steel Metallo-organic compound 52 Oxides 34

Radioactivity 77 NIOBIUM

Radioactivity 77 NITRIC OXIDE

In nitrogen 47 NITROGEN IN 41

Cast iron Ingot iron

Steel Titanium Zirconium NONFERROUS ALLOYS 31 NUCLEAR MATERIALS 59

Neutron density monitor wire Plutonium assay Plutonium isotopic Uranium assay Uranium isotopic OIL

Sulfur in 48 Trace elements in 49 ORES 53

Bauxite Copper

Fluorspar

Iron Lithium Molybdenum

Phosphate rock Tungsten

Zinc

Page OXALIC ACID

Radioactivity 77 OXIDIMETRIC 44

Arsenic trioxide Potassium dichromate Sodium oxalate OXIDES

Iron 54 Nitrogen 47 Titanium 55 Uranium 59 Zinc (rubber compounding) 84 OXYGEN IN 41

Ingot iron Nitrogen

Steel Titanium Zirconium PAINT, LEAD-BASED 48 PAPER 86

Faded strips Light sensitive PARTICULATE, URBAN 49 PERMEATION TUBES 50

Nitrogen dioxide

Sulfur dioxide PERMITTIVITY 83 pD STANDARDS 61 Disodium hydrogen phosphate

Potassium dihydrogen phosphate Sodium bicarbonate Sodium carbonate pH STANDARDS 61

Acid potassium phthalate Borax Disodium hydrogen phosphate

Potassium dihydrogen phosphate

Potassium hydrogen tartrate Potassium tetroxalate Sodium bicarbonate Sodium carbonate Tris(hydroxymethyl)aminomethane Tris(hydroxymethyl)aminomethane HCI PHOSPHATE

Ammonium dihydrogen 53 Potassium dihydrogen 53

See, pH standards Rock 54 PHOSPHORS 90 PHOSPHORUS

Ferro (steelmaking alloy) 29 Metallo-organic compound 52 PHOTOGRAPHIC 86

Microcopy resolution test chart Step tablets PLASTIC (See, Polymer)

Cellular 90

Polyester film for oxygen transmission 82 PLATINUM

Doped, wire 41 High-purity, wire 41 Magnetic susceptibility 74 Thermoelement 74 PLUTONIUM 59

Metal assay Standard matrix

Sulfate tetrahydrate

103
Page POLONIUM 77

Radioactivity POLYESTER PLASTIC FILM 82 POLYETHYLENE 69 POLYMER

Molecular weight 69 Oxygen transmission 82

Permittivity 83 POLYSTYRENE

POTASSIUM

Acid phthalate 44

Chloride (clinical) 45 Dichromate (clinical) 45 Dichromate (oxidimetric) 44

Iodide (spectrophotometric) 75

See, Fertilizer See, Ion activity POWDER DIFFRACTION STANDARDS 82

a-alumina Cerium oxide Chromium oxide

Rutile

Silicon Zinc oxide PRIMARY CHEMICALS 44

Arsenic trioxide Benzoic acid Boron

Dextrose Plutonium metal Plutonium sulfate tetrahydrate Potassium chloride Potassium dichromate

Potassium acid phthalate Rubidium chloride Sodium oxalate Strontium carbonate Sucrose Tris(hydroxymethyl)aminomethane Uranium metal Uranium oxide PROMETHIUM

Radioactivity 77 PROPANE 47 QUARTZ

a- for HF solution calolimetry 72 Cuvette for spectrophotometry 75

Filter media, on 51 RADIOACTIVITY STANDARDS 77

Alpha-particle

Beta-particle and gamma ray gas

Beta-particle, gamma-ray, and electron-capture

solutions Contemporary standard for carbon- 14 dating

laboratories Environmental Gamma-ray "point-sources" Mixed radionuclides Radium gamma-ray solutions Radium solutions for radon analysis RADIUM

Radioactivity 77 RADON

Radioactivity 77 REFRACTIVE INDEX 77

Glass

Silicone liquids 2,2,4-Trimethylpentane Toluene REFRACTORY MATERIALS 56

Page RESEARCH MATERIALS 88 Aluminum ultra purity Copper heat capacity Glass for microanalysis Phosphors

River sediment Tuna, Albacore RESISTIVITY 73, 83

Electrical Silicon RHENIUM

Isotopic and assay 61 RUBBER 84 RUBBER COMPOUNDING 84 RUBIDIUM

Isotopic 61 SAPPHIRE

Enthalpy and heat capacity 72 Thermal expansion 73 SEDIMENT

Estuarine 49

River, environmental 49

River, radioactivity 81 SELENIUM

Metal 35 Radioactivity 77 SILICON

Ferro (steelmaking alloy) 29

Isotopic 61 Metallo-organic compound 52

Refractories (Si02) 56

Resistivity 73 X-ray diffraction, powder 82 SILICONE LIQUIDS (refractive index) 77 SILVER

Alloys (microprobe) 42

Isotopic reference 61 Metallo-organic compound 52 SIZING STANDARDS 85

Calibrated glass spheres Turbidimetric and fineness (cement) SMOKE DENSITY CHAMBER

STANDARDS 87 SODIUM

Bromide (isotopic) 61 Metallo-organic compound 52 Oxalate 77

Radioactivity

See, Ion-activity SOLDER

Chip form 33

Solid form 39 SOLIDS, ANALYZED 48 SPECTROPHOTOMETRIC STANDARDS 75

Didymium-oxide glass filters Glass filters Liquid filters Metal on quartz filters Potassium dichromate

Potassium iodide (stray light) Quartz cuvette Quinine sulfate dihyudrate STAINLESS STEEL

Chip form 18

Resistivity 83

Solid form 22

104
STEELMAKING ALLOYS 29

Calcium molybdate Ferrochromium

Ferroniobium Ferrophosphorus

Ferrosilicon

Silicone, refined STEEL, THERMAL CONDUCTIVITY 73 STEELS, CAST 30 STEELS, CHIP FORM 18 High alloy Low alloy Low alloy, special Plain carbon

Stainless Tool STEELS, GAS-IN 41 STEELS, 18, 22 GRANULAR FORM 21 STEELS, SOLID FORM 22

Cast High temperature alloy Low alloy Low alloy, special Maraging Oxygen

Stainless Toll STEP TABLETS 86

Photographic X-ray STRONTIUM

Isotopic reference 61 Metallo-organic compound 52

Radioactivity 77 SUCROSE 44

Primary chemical SULFUR

Elemental (rubber compounding) 84

in residual fuel oils 48

in coal 48 SUPERCONDUCTIVE THERMOMETRIC

FIXED POINT DEVICES 70 SURFACE FLAMMABILITY 87 TAPE, MAGNETIC-SECONDARY

REFERENCE 84

Cartridge

Cassette Reel TEMPERATURE (See, Heat STANDARDS)

Calorimetry 71

Differential thermal analysis 90 Heat source 72 THERMAL CONDUCTIVITY 73 THERMAL EXPANSION 73 THERMOCOUPLE MATERIALS 74 THERMOMETERS 44 THORIUM 77

Radioactivity

Page TIN

Chip form 35 Coating thickness 66 Freezing point 71 Metallo-organic compound 52 TITANIUM

Chip form 35 Dioxide 55

Gases-in 41 Metallo-organic compound 52

Solid form 40

Unalloyed for oxygen 41 TRACE ELEMENTS

Biological matrices 45 Environmental 48

Fuels 48

Glass matrices 57 Metallo-organics 52 TUNGSTEN

Carbide 57 Concentrate 54

Electrical resistivity 73, 83 Microprobe 42 Thermal conductivity 73 Thermal expansion 73 TURBIDIMETRIC AND FINENESS

STANDARD 85 URANIUM 60

Isotopic and assay Metal Oxide

Depleted Enriched Primary standard VANDIUM

Metallo-organic compound 52 VAPOR PRESSURE STANDARD 72 VISCOSITY STANDARDS

Glass 67 WATER, TRACE ELEMENTS IN 48 WEAR METALS IN OIL 53 X-RAY STEP TABLET 86 X-RAY DIFFRACTION 82

Silicon powder YTTRIUM

Radioactivity 77 ZINC

Chip form 36

Concentrate, ore 54 Freezing point 71 High purity 41 Intermediate purity 41 Metallo-organic compound 52 Oxide (rubber compounding) 84

Solid form 40

Spelter modified 40 ZIRCONIUM

Chip form 36

Solid form 41

105
NUMERICAL INDEX TO SRM CERTIFICATES

The Certificate Date listed is the current version of the Certificate. Those dates followed by the letter "P" indicate that it is a Provisional Certificate. In general, Provisional Certificates are issued for Standard Reference Materials before all of the values have been certified, but after a sufficient number of values are certified so that the material is a valuable standard for the intended purpose. As additional values are certified, the Provisional Certificate may be

revised and when and if all of the values are certified, the final Certificate is issued. When new or revised Certificates are issued for SRM's they are announced in the SRM Price and

Availability List which supplements this catalog. SRM purchasers whose Certificate shows an earlier date than listed below may obtain the current version of the Certificate from the Office of Standard Reference

Materials, Room B311, Chemistry Building, National Bureau of Standards, Washington, D.C. 20234. One or more of the following letters apply to materials where no date is listed. A. Individually Certified. B. The Material is issued with "Instructions for Use" in lieu of a Certificate. C. This Material is not certified, refer to page reference for details. D. Material is in preparation. E. Research Material: Issued with a "Report of Investigation."

F. Special Reference Material: Information provided, but not certified by NBS.

G. Set of SRM's: Issued with Certificates for the individual SRM's.

H. Not individually issued, part of a set.

106
SRM Certificate date Page

lc 12-14-78 55 3d 4-2-79 30 4k 5-27-76 30 5L 11-9-70 30 6g 11-9-70 30 7g 10-5-59 30

8j 4-10-72 18 llh 4-30-74 18 12h 3-7-66 18 13g 4-30-74 18 14e 11-9-65 18 15g 4-30-74 18 16e 4-30-74 18 17c D 44

19g 9-30-64 18 20g 10-23-70 18 27f 5-31-77 54 30f 6-5-79 19 32e 4-5-57 19 33d 6-10-55 19 36b 7-18-69 19 37e 8-28-58 32

39i 7-15-68 71 40h 4-24-69P 44 41b 4-10-75 44 42g 7-18-72 71 43h 8-15-73 71 44f 4-5-73 71 45d 12-6-71 71 49e 12-6-71 71 50c 6-25-57 21 53e 1-20-70 33 54d 9-20-57 34 58a 4-25-78 29 59a 11-6-69 29 64c 8-24-77 29 68c 8-15-71 29 69b 8-24-79 54 70a 3-26-65P 55

71 2-1-29 29 72g D 19 73c 7-13-66 20

76a 4-5-77 56 77a 4-5-77 56 78a 4-5-77 56 79a 1-8-80 53 81a 1-78 55 82b 4-12-66 30 83d D 44

84j 10-11-78 44 85b 5-9-57 31 87a 11-17-69P 31 88a 1-31-67P 55 89 8-27-32 56 90 10-1-28 29

91 6-15-31 56 92 4-30-7 IP 56 93a 8-31-73 56 94c 8-15-73 36 97a 10-8-69 55

SRM Certificate date Page

98a 10-8-69 55 99a 3-26-65P 55 100b 8-18-59 19 lOlf 5-19-70 21 103a 9-28-62 56

105 4-22-37P 19 106b 3-24-61 19 107b 11-1-62 30

113a 12-29-75 54 114m 4-15-73 85 115a 4-19-62 30

120b 7-31-79 54 121d 7-7-71P 20 122g 4-2-79 30 123c 7-7-71P 20

125b 4-10-70 19 126c 12-30-77 20

127b 1-25-68P 33 129c 8-7-73 19 131c 6-2-77 19 132b 8-16-73 21 133a 6-8-56 20

134a 5-6-57 21 136c 3-24-70P 44

139b 5-17-78 19 140b 4-16-70 44

141c 9-27-76 44

142 7-9-69 44

143c 9-27-76 44

148 12-22-70 44

152a 10-11-65 18 153a 1-5-60 21 154b 5-16-73 55

155 10-1-46 19 158a 8-8-61 32 160b 8-4-69P 20

163 1-11-68 21 165a 10-16-78 55 166c 3-17-70 20

171 11-27-51 33 173b D 35 174 8-20-70P 35 1767 8-20-70P 35

178 7-14-69 18 179 6-15-76 19 180 3-31-71 53

181 8-20-70P 53 182 8-20-70P 53

183 8-20-70P 53 184 2-26-73 32 185e 5-23-73 62

1861c 9-1-70 62

18611c 9-1-70 62 187b 9-9-70 62

188 1-10-64 62

189 1-10-64 62

191 7-15-68 62

192 7-15-68 62

193 11-14-74 53 194 1-8-74 53

107
SRM Certificate date Page

195 1-7-76 29

196 11-9-70 29

198 1-6-60 56

199 1-6-60 56 200 8-7-74 53 211c D 69, 77 217c D 69, 71, 77 276a D 57 277 10-24-78 54

291 10-1-75 19 293 3-27-75

19 329 12-29-75 54 330 1-20-77 53 331 11-20-77 53 332 6-26-77

53 333 1-20-77 53 3354-7-66

18 337 8-16-66

18 339 7-21-65

20

340 11-9-70 29

341 3-26-62 30 342a 4-27-70

30 344 10-2-63 20

345 1-23-64 20

348 1-17-66P 20 349 5-15-59P 33 350a 4-27-81 44

352a 6-16-80 41 354

8-7-61

41 355

9-8-66

41 356 9-8-66

41 357

6-16-80

41 358

6-16-80

41 360a 1-30-67 36

361

6-5-79

19 362 1-8-76 19 363 1-8-76 19 364 1-8-76 19 365

6-1-79

30

367

7-21-77

20

368 1-1-78 18 370e C 84 371g C 84 372h C 84

373f C 84

374c C 84 375g C 84 378b C 84 379 C 84 382a C 84 384d C 84 385b 8-15-67 84 386h 3-10-75 84 388k 3-19-80 84

391

9-15-72

84

393 D 33 394

7-4-76

33 395

7-4-76

33 396

7-4-76

33 398 1-23-78 33

SRM Certificate date Page

399 1-23-78 33 400 1-23-78 33 404a 5-5-65 23, 92 405a 5-5-65 23, 92 407a 5-5-65 23, 92 408a 5-5-65 23, 92 409b 5-5-65 23, 92 413 5-5-65 23, 92 414 5-5-65 23, 92 417a 5-5-65 23, 92 418a 5-5-65 23, 92 420a 5-5-65 23, 92 427 5-5-65 23, 92 436 9-22-59 28, 92 437 9-22-59 28, 92 438 9-22-59 28, 92 439 9-22-59 28, 92 440 9-22-59 28, 92

441 9-22-59 28, 92 442 10-25-65 25, 92 443 10-25-65 25, 92 444 10-25-65 25, 92 445 1-19-66 26, 92 446 1-19-66 26, 92 447 1-19-66 26, 92 448 1-19-66 26, 92 449 1-19-66 26,92

450 1-19-66 26, 92 454 9-16-80 33 457 1-20-78 39 461 5-5-65P 24 462 5-5-65P 24 463 5-5-65P

464 5-5-65P 24 465 5-5-65P 24 466 5-5-65P 24 467 5-5-65P 24 468 5-5-65P 24 469 D 63 474 D 63 477 D 82 478 2-28-74 43 479a D 43 480 11-22-68P 43

481 2-14-69 43 482 6-6-69 43 483 6-11-71 43 484b 11-26-80 63 485a D 81 486 D 81 493 8-28-70 81 494 1-20-78 39 495 1-20-78 39 496 1-20-78 39 498 1-20-78 39 499 1-20-78 39 500 1-20-78 39 607 5-21-73 58 608 G 58 609 G 58

108
SRM Certificate date Page

610 8-8-72P 58 611 8-8-72P 58 612 8-8-72P 58 613 8-8-72P 58 614 8-8-72P 58 615 8-8-72P 58 616 8-8-72P 58 617 8-8-72P 58 618 G 58 619 G 58 620 5-17-72P 56

621 3-13-75

56 622 3-19-76

67 623 3-19-76

67 624 10-25-77 67 625 4-24-64

40

626

4-24-64

40

627

4-24-64

40

628

4-24-64

40

629

4-24-64

40

630

4-24-64

40

631 4-16-70P 40

633 2-24-77

57 634

2-24-77

57 635

2-24-77

57 636

2-24-77

57 637 2-24-77

57 638 2-24-77

57 639 2-24-77

57 640 8-7-74

82

641 1-26-60P 40 642 1-26-60P 40

643 1-26-60P 40 644 1-26-60P 40

645 1-26-60P 40 646 1-26-60P 40 650 D 35 651 D 35 652 D 35 654a 3-22-7 IP 40

661 H(8-15-72P) 24

662 H(8-15-72P) 24

663 H(2-12-73P) 24 664 H(2-12-73P) 24

665 H(2-12-73) 24 668 G 24

671

6-29-79

34

672

6-29-79

34 673

6-29-79

34 674 D 82 680a 3-1-77 42

681

3-1-77

42

682 2-1-71P 42

683 7-9-68P 42

685 9-26-68P 42 690 10-28-78 54

691 D 54 692 10-24-78 54

693 10-24-78 54 696 8-24-79 54

SRM Certificate date Page

697 8-24-79 54 698 8-24-79 54 700d B 86 701d 1-15-77 86 702 11-1-66 86 703 11-1-66 86 705 11-28-78 69,72 706 undated 69 708 9-15-73

67 709 6-5-74

67, 68 710

6-29-62

67, 68

711 7-1-64

67, 68 712 10-4-65 67, 68 713 10-4-65 67, 68 714 10-4-65 67, 68 715 9-7-66

67, 68 716 9-7-66

67, 68 717 11-18-69 67, 68, 69

718

4-28-72

69 720 8-26-70

72 723a 4-20-81

44, 67 724a 9-24-73

72 726 1-31-67 34 728

7-9-68

36 729 D 72

731 7-31-72

73 732 10-3-77 73 733 12-30-71 74 736a D 73 737 5-19-76 73 738 D 73 739 5-12-71 73 740 2-19-70

71 741 7-18-72

71 742

6-5-70

71 743

4-22-76

71 745 5-14-69

72 746 8-11-70

72 748 8-10-70 72 763

4-5-73

74 764

4-5-73

74

765

4-5-73

74 766

4-5-73

74 767a D 70 768 12-13-78 70 772

7-11-78

74

773 D 68

781

4-1-77

72 782 D 72 803a 5-5-65 92 D803a 5-5-65 92 804a 5-5-65 92 805a 5-5-65 92 807a 5-5-65 92 D807a 5-5-65 92 808a 5-5-65 92 809b 5-5-65 817b 5-5-65 92

820a 5-5-65 92

821

5-5-65

92

109
SRM Certificate date Page

827 5-5-65 92 837 9-22-59

28, 92 D837 9-22-59 28, 92 840

9-22-59

28, 92 D840 9-22-59 28, 92 D841 9-22-59 28, 92 849 1-19-66 92 D849 1-19-66 92 850 1-19-66 92 D850 1-19-66 92

871 8-2-7932 872 8-2-79

32 874 1-19-78 32 875 1-19-78 32 879 6-20-79

32 880 6-20-79

32 882 6-20-79

33 897 D 34 898 D 34 899 D 34 900

4-5-79

45 909 5-21-80

45 910 D 45 911a 3-9-80 45 912a 11-16-79 45 913 11-23-73 45 914 11-28-73 45 915 11-21-73 45 916

3-10-71

45 917

9-20-73

45 918 11-23-73 45 919 11-23-73 45 920

11-23-73

45

921 12-16-73 45 922 8-20-76

45, 62 923 8-20-76

45, 62 924 11-23-73 45 925 12-26-73 45 926

7-18-77

45 927 7-18-77

45 928 5-19-76

45 929

4-27-79

45 930D A 45, 76 931c D 45, 76 932 A 45, 76 934 A 45 935

6-1-77

45, 76 936

9-1-78

45, 76 937

6-9-78

45 944

2-14-69

44, 59 945

4-6-71

59 946 12-3-71P 59 947 12-3-7 IP 59 948 9-1-72P 59 949e 10-1-75 44, 59 950b 3-1-78 44, 59 951 10-12-71 44, 61 952 10-12-71 61 953

3-12-69

59, 60 960 5-12-72 44

SRM Certificate date Page

961 6-11-74 60 962a D 60 963a D 60 964 6-11-74 60 975 3-11-65 61 976 3-24-65 61 977 3-24-65 61 978 3-24-65 61 979 5-3-66 61 980 1-31-67 61 981-3 4-10-73 61 984 7-27-70 44, 61 985 8-31-79 44 987 3-6-72P 44 989 2-19-74 61 990 8-75 61 991 3-19-76 61 993 6-30-75 59, 61 995 8-25-80 59, 61 996 D 59 999 9-6-72 44

1001 A(8-14-78) 87 1002c 12-13-78 87

1003 7-1-65P 85 1004 4-3-72 85 1006a 6-1-79 87 1007a 2-27-76 87 1008 A 87 1010a 8-12-78 87 1017a 9-24-71 85 1018a 5-16-73 85 1019a D 85 1020 E 90, 92

1021 E 90, 92

1022 E 90, 92

1023 E 90, 92 1024 E 90, 92

1025 E 90, 92 1026 E 90, 92

1027 E 90, 92

1028 E 90, 92

1029 E 90, 92 1030 E 90, 92

1031 E 90,92

1032 E 90, 92

1033 E 90, 92 1051b 7-15-68 52 1052b 3-1-68 52 1053a 1-23-70 52 1055b 7-23-68 52 1057b 8-5-68 52 1060a 4-24-64 52 1061c 9-9-70P 52 1062b 4-12-76 52 1065b 11-1-67 52 1066a 4-23-69 52 1069b 2-13-69 52 1070a 4-24-64 52 1071b 2-26-76 52 1073b 7-15-67 52

110
SRM Certificate date Page

1074a 5-13-66 52 1075a 10-25-67 52 1077a 2-10-68 52 1078b 7-25-72 52 1079b 2-26-69 52 1080a 2-26-69 52 1084 D 53 1085 D 53 1086 5-14-80 41 1087 5-14-80 41 1088 5-14-80 41 1089 G 41 1090 4-2-69 41 1091 4-2-69 41 1092 4-2-69 41 1093 3-4-69P 41 1094 6-12-69P 41 1095 H(10-23-70) 41 1096 H(6- 13-72) 41 1097 H(5-26-72P) 41 1098 H(10-3-73) 41 1099 H(7-28-70P) 41 CI 101 7-31-64P 37 1102 7-31-64P 37 1103 8-13-65 37 1104 8-13-65 37 CI 104 8-13-65 37 C1105 8-13-65 37 1106 11-17-69P 37 CI 106 11-17-69P 37

1107 11-17-69P 37 CI 107 11-17-69P 37 1108 11-17-69P 37 CI 108 11-17-69P 37 1109 7-14-65P 37 CI 109 8-18-70P 37 1110 8-18-70P 37 CI 110 8-18-70P 37

1111 8-18-70P 37 CI 111 8-18-70P 37 1112 1-17-69P 37 CI 112 1-17-69P 37 1113 1-17-69P 37 C1113 1-17-69P 37 1114 1-17-69P 37 CI 114 1-17-69P 37 1115 2-19-70P 37 CI 115 2-19-70P 37 1116 2-19-70P 37 CI 116 2-19-70P 37 1117 2-19-70P 37 CI 117 2-19-70P 37 1118 7-14-65P 37 CI 118 2-26-70P 37 1119 7-14-65P 37 CI 119 2-26-70P 37 CI 120 2-26-70P 37 CI 121 12-19-66P 37 1122 12-19-66P 37 CI 122 12-19-66P 37

SRM Certificate date Page

1123 12-19-66P 37 CI 123 12-19-66P 37

1131 1-25-68P 39 1132 1-30-70 39 1134 4-30-70 24

1135 7-27-72 24

1136 8-31-73 24

1138a 1-20-77 31 1139a 1-20-77 31 1143a 12-1-76 31 1144a 12-1-76 31 1145 5-16-78 31 1146 5-16-78 31 1150 5-16-78 31 C1151 1-31-80 26

1151a D 26 C1152 1-31-80 26

1152a D 26 CI 153 1-31-80 26

1153a D 26 CI 154 1-31-80 26

1154a D 26

1155 8-4-69P 26

1156 4-5-66P 27 1157 8-6-73 28 1158 12-30-77 27

1559 2-18-69P 40

1160 2-18-69P 40

1166 5-5-65P 24

1169a 5-5-78 24 1170b 1-30-74 26

1171 7-7-71P 26

1172 7-7-71P 26

1198 H(8-17-74) 28 1199 H(8-17-74) 28 1200 H(8-17-74) 28

1201 H(8- 17-74) 28 1206-2 1-16-73 28 1207- 1 1-16-73 28 1207-2 1-16-73 28 1208- 1 1-16-73 28 1208-2 1-16-73 28 1212a 5-6-74 41 1222 8-21-78 24 1234 D 41 1235 D 41 1236 D 41 1237 D 41 1238 D 41 1239 D 41 C1251 9-16-80 39 C1252 9-16-80 39 C1253 9-16-80 39

1255 1-8-80 36 1256 1-8-80 36 1257 D 36

1258 5-3-78 36

1259 5-3-78 36

1261a 2-24-81 24

1262a 2-24-81 24

111
SRM Certificate date Page

1263a 2-24-81 24

1264a 2-24-81 24

1265a 2-24-81 24

1267 1-19-76 26

1275 3-10-80 37 1276 3-10-80 37 C1285 D

1301a A 64

1302a A 64

1303a A 64

1304a A 64

1305a A 64

1306a A 64

1307a A 64

1308a A 64

1310a A 64

1311a A 64

1312a A 64

1313a A 64

1314a A 64

1351a A 64

1352a A 65 1353a A 65 1361a A 64

1362a A 64

1363a A 64

1364a A 65 1365a A 65 1366a A 65 1367a A 65 1370a A 65 1384a A 66

1398a A 65 1399a A 66

1451 D 74

1456 D 72 1460 1-17-79 73, 83

1461 1-17-79 73, 83 1462 1-17-79 73, 83 1463 1-17-79 73, 83 1464 1-17-79 73, 83 1465 1-17-79 73, 83 1466 1-17-79 73, 83 1467 1-17-79 73, 83 1468 1-17-79 73, 83 1469 1-17-79 73, 83 1470 1-78 82 1475 12-2-71 69, 70, 72

1476 11-6-69 69, 70

1478 1-17-79 69, 70

1482 10-18-76 69, 70

1483 3-9-76 69, 70

1484 10-18-76 69, 70

1490 2-21-77 70

1511

4-24-69

83, 92

1512

7-2-69

83, 92

1513

9-17-69

83, 92

1516 7-9-69 83, 92

1517 7-9-69 83, 92

1519 7-9-69 83, 92

SRM Certificate date Page

1521 A 73, 83 1522 A 73, 83 1523 12-12-80 73

1541 3-1-71P 81 1566 12-12-79 46

1567 1-3-78 46

1568 1-3-78 46

1569 9-7-76 46

1572 D 60

1573 10-18-76 46

1575 10-18-76 46

1577a D 60

1579 1-23-73 48

1580 3-10-80 50

1600 A 84

1620 12-1-79 48

1621a 2-1-80 48

1622a 8-31-79 48

1623a D 48

1624a D 48

1625 A(l-5-73) 51 1626 A(8-12-71) 51 1627 A(8-12-71) 51 1629a A (5-81) 51 1630 11-31-71 48

1632a 1-23-78 49

1633a 4-18-79 49

1634a D 49

1635 1-23-78 49

1636a 2-5-80 48

1637a 2-5-80 48

1638a 2-5-80 48

1641a 12-12-78 48

1642a 8-24-77 48

1643a 3-3-80 49

1644 D 50

1645 11-16-78 49

1646 D 49

1648 11-16-78 49

1651 11-12-68 72 1652 11-12-68 72

1653 11-12-68 72 1654 4-7-71 72

1655 D 72 1658a A 47

1659a A 47

1660a A 47

1661a A 47

1662a A 47

1663a A 47

1664 A 47 1665b A 47

1666b A 47

1667b A 47

1668b A 47

1669b A 47

1674b A 47 1675b A 47

1677c A 47

1678c A 47

112
SRM Certificate date Page

47

47 1681b A 47 1683a A 47

47

47 1686a A 47

1687a .. A 47

87 1815a D 83 1816a D 83

1 820 52, 77 1821a D

1822 D 52, 77

1823 12-9-76 52, 77 1830 D 56

1831 D 56

1901 3-1-76 85 1967 2-23-77 74

1968 6-77 45, 71 2003a D 76 2009 1-8-80 76 2010 1-8-80 76 2013 1-8-80 76 2014 1-8-80 76 2015 D 77 2016 D 77 2019 D 77 2020 D 77 2021 D 77 2022 D 77 2023 D 76 2024 D 76 2025 D 76 2030 A(9-23-76) 76 2031 A 76 2032 10-31-79 76 2033 5-9-80 76 2106 C 86 2107 C 86

2141 8-28-70 44

2142 9-1-70 44

2143 1-23-73 44 2144 4-5-73 44

62

2186II 5-28-68 62 2191 5-28-68 62 2192 5-28-68 62 2201 2-22-71 62 2202 2-22-71 62

62 2308a A 66 2318a A 66 2338a A 66

66

2601 .. . A 75 2612a A 47 2613a A 47 2614a A 47 2619a A 47

SRM Certificate date Page

2620a A 47 2621a A 47 2622a A 47 2623a A 47 2624a A 47 2625a A 47 2626a A 47 2630 A 48

2631 A 48 2632 A 48

2633 A 48

2634 A 48 2635 A 48

2637 A 48

2638 A 48 2639 A 48 2640 A 48

2641 A 48 2642 A 48 2657 A 48

2658 A 48

2671 10-1-75 51 2672 2-27-76 51 2673 6-25-79 51 2674 12-18-79 51 2675 8-19-75 51 2676a 4-13-78 51 2679 9-24-76 51 3200 A 84 3210 A 84 3216 A 84 4200B A 80 4201B A 80 4202C A 80 4203C A 80 4206B A

4207 A 80 4211 5-70 80 4212 A 80 4213 A 80 4218D A 80 4219B 6-74 78 4222 8-67 78 4223 8-67 78 4224 8-67 78 4226 5-68 78 4229 5-72 78 4233B 4-25-73 78 4235 A 79 4240 A 80 4245 5-74 78 4246 5-74 78 4247 5-74 78 4257 4-79 78 4260B A 80 4302 A 79 4308 A 79

4331 3-75 78 4370B 5-78 78 4904F A 79

113
SRM Certificate date Page 4906B 5-69 79 4907 A 79 4919D 7-75 78 4922L A 78 4925 7-58 78 4926C 9-78 78 4927B 9-78 78 4929C 4-70 78 4935C 3-74 79 4940B 2-76 78 4943 1962 78 4947 9-78 78 4950D A 80 495 1C 4-78 80 4952B 5-76 80 4953C A 80 4956 9-67 81 4957 A 81 4958 A 81 4959 A 81 4960 A 81 4961 A 81 4962 A 81 4963 A 81 4964B A 81 499 1C A(5-69) 80 4996B A(5-69) 80 4997E D 80 4999F D 78 6250 A 84 U-0002 7-30-70P 59 U-005 4-21-69P 59 U-010 4-21-69P 59 U-015 4-21-69P 59 U-020 4-21-69P 59 U-030 4-21-69P 60 U-050 4-21-69P 60 U-100 6-23-66P 60 U-150 8-5-66P 60 U-200 6-1-66P 60 U-350 5-23-66P 60

SRM Certificate date Page

U-500 5-24-66P 60 U-750 2-11-66P 60 U-800 2-11-66P 60 U-850 2-11-66P 60 U-900 2-11-66P 60 U-930 2-11-66P 60 U-970 7-9-70P 60 RM 1C E 88 RM 1R E 88 RM 5 E 88 RM 31 E 88 RM 40 E 88 RM 45b E 88 RM 49 8-80 79 RM 50 E 88 GM 1 F 90 GM 2 F 90 GM 21 F 91 GM 23 F 91 GM 25 F 91 GM 27 F 91 GM 29 F 91 GM 31 F 91 GM 35 F 91 GM 37 F 91 GM 39 F 91 GM40 F 91 GM 41 F 91 GM 43 F 91 GM 47 F 91 GM 49 F 91 GM 51 F 91 GM 53 F 91 GM 57 F 91 GM 754 F 88 GM 757 F 88 GM 758 F 88 GM 759 F 88 GM 760 F 88

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