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PUBLICATIONS

NBS SPECIAL PUBLICATION

1975-76 Edition

U.S. DEPARTMENT OF COMMERCE / National Bureau of Standards

100

no . SLU> 0

ms-76

CATALOG OF NBS

ANDARD REFERENCE

MATERIALS
NATIONAL BUREAU OF STANDARDS

The National Bureau of Standards 1 was established by an act of Congress 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 consists of the Institute for Basic Standards, the Institute for Materials Research, the Institute for Applied Technology,

the Institute for Computer Sciences and Technology, and the Office for Information Programs.

THE INSTITUTE FOR BASIC STANDARDS provides the central basis within the United

States of a complete and consistent system of physical measurement; coordinates that system

with measurement systems of other nations; and furnishes essential services leading to accurate and uniform physical measurements throughout the Nation's scientific community, industry, and commerce. The Institute consists of a Center for Radiation Research, an Office of Measurement Services and the following divisions: Applied Mathematics —- Electricity — Mechanics — Heat — Optical Physics — Nuclear

Sciences 2 — Applied Radiation 2 — Quantum Electronics 3 — Electromagnetics 3 — Time

and Frequency 3 — Laboratory Astrophysics " — Cryogenics 3. THE INSTITUTE FOR MATERIALS RESEARCH conducts materials research leading to improved methods of measurement, standards, and data on the properties of well-characterized materials needed by industry, commerce, educational institutions, and Government; provides

advisory and research services to other Government agencies; and develops, produces, and

distributes standard reference materials. The Institute consists of the Office of Standard Reference Materials and the following divisions: Analytical Chemistry — Polymers — Metallurgy — Inorganic Materials — Reactor

Radiation — Physical Chemistry.

THE INSTITUTE FOR APPLIED TECHNOLOGY provides technical services to promote

the use of available technology and to facilitate technological innovation in industry and Government; cooperates with public and private organizations leading to the development of

technological standards (including mandatory safety standards), codes and methods of test; and provides technical advice and services to Government agencies upon request. The Institute consists of a Center for Building Technology and the following divisions and offices: Engineering and Product Standards — Weights and Measures — Invention and Innovation — Product Evaluation Technology — Electronic Technology — Technical Analysis — Measurement Engineering — Structures, Materials, and Life Safety 4 — Building

Environment 4 — Technical Evaluation and Application 4 — Fire Technology.

THE INSTITUTE FOR COMPUTER SCIENCES AND TECHNOLOGY conducts research and provides technical services designed to aid Government agencies in improving cost effec- tiveness in the conduct of their programs through the selection, acquisition, and effective

utilization of automatic data processing equipment; and serves as the principal focus within

the executive branch for the development of Federal standards for automatic data processing

equipment, techniques, and computer languages. The Institute consists of the following

divisions: Computer Services — Systems and Software — Computer Systems Engineering — Information Technology.

THE OFFICE FOR INFORMATION PROGRAMS promotes optimum dissemination and

accessibility of scientific information generated within NBS and other agencies of the Federal Government; promotes the development of the National Standard Reference Data System and

a system of information analysis centers dealing with the broader aspects of the National Measurement System; provides appropriate services to ensure that the NBS staff has optimum

accessibility to the scientific information of the world. The Office consists of the following

organizational units: Office of Standard Reference Data — Office of Information Activities — Office of Technical

Publications — Library — Office of International Relations.

1 Headquarters and Laboratories at Gaithersburg, Maryland, unless otherwise noted; mailing address Washington, D.C. 20234.

2 Part of the Center for Radiation Research.

3 Located at Boulder, Colorado 80302.

* Part of the Center for Building Technology.
JUL 1 8 1975

Catalog of NBS

Standard Reference Materials

C

1975-76 Edition ^

Office of Standard Reference Materials

Institute for Materials Research

National Bureau of Standards

Washington, D.C. 20234

CAUTION: The values given in the following sections are listed primarily

as a guide to purchaser. 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 stand- ards should always be consulted to obtain the certified values.

U.S. DEPARTMENT OF COMMERCE, Rogers C. B. Morton, Secretary

NATIONAL BUREAU OF STANDARDS, Richard W. Roberts, Director

issued June 1975
Library of Congress Cataloging in Publication Data

United States. National Bureau of Standards. Office of Standard

Reference Materials. Catalog of NBS Standard Reference Materials. (NBS Special Publication; 260) Published 1965-1969 under title: Catalog and Price List of Standard Reference Materials issued by the National Bureau of Standards; published in 1970: Catalog of Standard Reference

Materials; in 1973: Standard Reference Materials: 1973 catalog. Supt. of Docs. No. C 13.10:260

1. Materials—Standards—United States—Catalogs. I. Title. II. Series: United States. National Bureau of Standards, Special Publication; 260. QC100.U57 No. 260, 1975 [TA404.5] 389'.08s [620.1'1] 75-1209

National Bureau of Standards Special Publication 260

(Supersedes NBS Spec. Publ. 260-1973 Editions)

Nat. Bur. Stand. (U.S.), Spec. Publ. 260-1975-76 catalog, 90 pages (June 1975) CODEN: XNBSAV

U.S. GOVERNMENT PRINTING OFFICE

WASHINGTON: 1975

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

er by SD Catalog No. C13.10:260-1975-76 cat.)Price $1.50 (Add 25 percent additional for other than U.S. maili
CONTENTS

Page GENERAL INFORMATION 1

PREPARATION AND AVAILABILITY OF

STANDARD REFERENCE MATERIALS ... 1

Ordering

Terms

Domestic Shipments

Foreign Shipments

CHEMICAL COMPOSITION STANDARDS .... 10

Steels (chip form) 10

Plain carbon

Low alloy

High alloy

Stainless Tool

Steels (granular form) 13

Steels (solid form) 14

Special ingot irons and low alloy

Stainless Specialty

High-temperature alloys

Tool

Steelmaking Alloys 19

Cast Irons (chip form) 20

Cast Steels, White Cast Irons, Ductile Irons, and Blast Furnace Irons (solid form) 21 Nonferrous Alloys (chip form) 22

Aluminum

Cobalt

Copper

Lead

Magnesium

Nickel

Nickel oxide

Selenium

Tin

Titanium

Zinc

Zirconium

Nonferrous Alloys (solid form) 24

Copper

Lead

Nickel

Tin

Titanium

Zinc

Zirconium

Gases in Metals 28

High-Purity Metals 29

Page

Electron Probe Microanalytical Standards .... 29

Primary, Working, and Secondary Standard

Chemicals 31 Microchemical Standards 31

Clinical Laboratory Standards 32

Biological Standards 32

Environmental Standards 33

Analyzed gases Analyzed liquids

Analyzed solids Permeation tubes Trace elements in fossil fuels Forensic Standards 35

Hydrocarbon Blends 35

Metallo-Organic Compounds 36

Fertilizers 36

Ores 37

Cements 38

Minerals, Refractories, Carbides, and Glasses . . 38

Trace Element Standards 40

Nuclear Materials 41

Special nuclear materials Plutonium assay Plutonium isotopic

Uranium assay Uranium isotopic

Neutron density standards

Fission track glass standards

Isotopic Reference Standards 43

PHYSICAL PROPERTY STANDARDS 44

Ion Activity Standards 44

pH standards pD standards Ion selective electrodes Mechanical and Metrology Standards 45

Coating thickness

Glass

Elasticity

Density

Polymer

Heat Standards 51 Superconductive thermometric fixed point

devices Freezing points

Defining fixed points

Determined reference points

Melting points

Calorimetry

Combustion

Solution Heat source

iii
Page Page

Sizing Standards 64

Glass spheres for particle size Turbidimetric and fineness (cement)

Color Standards 64

The ISCC-NBS centroid color charts Paint pigment

Light-sensitive papers

Light-sensitive plastic chips

X-ray and Photographic Standards 65

Surface Flammability Standards 65

Smoke Density Chamber Standards 65 Water Vapor Permeance 66

Internal Tearing Resistance Paper 66

Tape Adhesion Testing Standard 66

RESEARCH MATERIALS 67

High-Purity Materials SEM Resolution Test Specimen

Phosphors

GENERAL MATERIALS 68

Enthalpy and heat capacity

Differential thermal analysis

Vapor pressure Thermal conductivity

Thermal expansion

Thermocouple materials Magnetic Standards 54

Magnetic susceptibility

Optical Standards 55

Spectrophotometry

Color standards for spectrophotometrictristimulus integrator systems

Glass filters Liquid filters Quartz Cuvette Thermal emittance

Reflectance

Refractive index

Radioactivity Standards 58

Alpha-particle standards

Beta-particle and gamma-ray gas standards

Alpha-particle, beta-particle, gamma-ray, and

electron-capture solution standards

.

Contemporary standard for carbon-14 dat- ing laboratories Environmental standards Low energy photon sources Gamma-ray "point-source" standards Radium gamma-ray solution standards Radium solution standards for radon analysis Radioactivity standard reference materials

currently not in stock

Metallurgical 61 Mossbauer 61 X-ray Diffraction 61

Permittivity 62

Reference Fuels 62

Resistivity 62

ENGINEERING TYPE STANDARDS 63

Standard Rubber and Rubber-Compounding

Materials 63

Reference Magnetic Tapes 63

Hydrogen in Steel Nickel and Vanadium in Residual Oil Absorbent Clay, (ASTM D2007)

COMPUTER PROGRAMS FOR METRIC CONVERSION 68

OTHER SERVICES OF THE NATIONAL

BUREAU OF STANDARDS „ 69

Calibration and Test Services Standards Information Services Standard Reference Data

Technical Publications

GUIDE FOR REQUESTING THE DEVELOPMENT OF STANDARD REFERENCE MATERIALS 72

INDEXES

Alphabetical Index 73

Numerical Index to SRM Certificates 80

iv
STANDARD REFERENCE MATERIALS

Issued by the National Bureau of Standards

This Catalog lists and describes the Standard Reference Materials (SRM's), Research Materials (RM's), and General Materials (GM's) currently distributed by the National Bureau of Standards, as well as many of the materials currently in preparation. SRM's are used to calibrate measurement

systems and to provide a central basis for uniformity and accuracy of measurement. The unit and

quantity, the type, and the certified characterization are listed for each SRM, as well as directions for ordering. The RM's are not certified, but are issued to meet the needs of scientists engaged in materials

research. RM's are issued with a "Report of Investigation," the sole authority of which is the author of

the report. The GM's are standardized by some agency other than NBS. NBS acts only as a distribution point and does not participate in the standardization of these materials. Announcements of new and

renewal SRM's, RM's, and GM's are made in the semi-annual supplements to this Catalog, SRM Price

List, and in scientific and trade journals.

Key words: Analysis; characterization; composition; properties; Standard Reference Materials; Research Materials; General Materials.

General Information

All of the Standard Reference Materials (SRM's), Research Materials (RM's), and General Materials (GM's)

listed in this Catalog bear distinguishing names and numbers by which they are permanently identified. Each

SRM, RM, or GM bearing a given designation is of identical characterization with every other sample bearing the same designation, within the limits required by the use

for which it is intended; or if necessary, it is given a

serial number and an individual calibration. The first SRM's issued by the Bureau were a group of

ores, irons, and steels certified for chemical composition,

and by custom they came to be called "standard samples." At present, nearly 900 SRM's are available, covering a wide range of chemical and physical properties, and

the designation, Standard Reference Material, is more

appropriate. As the number of SRM's has increased, so has the variety, with such new groups being established

as: clinical laboratory standards, nuclear materials, glass

viscosity standards, rubber and rubber compounding materials, color standards, and coating thickness standards. These groups are listed under the headings: Standards of

Certified Chemical Composition, Standards of Certified Physical Properties, Engineering Type Standards, Research Materials, or General Materials. The groups of materials under these general headings are listed in the

Table of Contents. An alphabetical index provides the

location of a particular material, or group of similar materials. A numerical index provides the date of the cur- rent Certificate issued with these materials. The detailed listing of materials indicates the nominal

certification for which the material is issued, but the

Certificate must be consulted for the actual certification A number of SRM's are issued for which it is not feasible to supply numerical values, or for which such certifica- tion would not be useful. These SRM's provide assurance

of identity among all samples with the same designation,

and permit standardization of test procedures and re- ferral of physical or chemical data on unknown materials

to a common basis.

Preparation and Availability of

Standard Reference Materials

New SRM's are prepared each year and are an- nounced through periodic supplements to this Catalog as well as directly, to prospective users. The preparation of "renewal" SRM's is intended to be completed by the time the existing supply of each

kind of material is exhausted, but this is not always

possible. The renewal will not usually be identical to its predecessor, but will be quite similar especially with re- gard to the characteristics certified, and generally the

1
renewal can be used in place of its predecessor. As an example, when the first 0.1 percent carbon Bessemer

steel was prepared in 1909, it was called Standard Sample No. 8. During the following years, a number of re- newal batches, 8a, 8b, etc., were prepared; SRM 8j is now available and represents the 10th renewal batch of

0.1 percent carbon Bessemer steel. While each of these batches differ somewhat in detailed analysis from one

batch to another, all retain 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 has become available for a material, production may be discontinued permanently

or until sufficient justification is obtained to warrant

renewal. Supplements to the Catalog are issued periodically to keep it current. These supplements provide a complete

list of the available SRM's and their prices and provide

descriptions of SRM's issued since the latest Catalog was

printed.

Ordering

Orders should be addressed to the Office of Standard

Reference Materials, Room B311, Chemistry Building,

National Bureau of Standards, Washington, D.C. 20234.

Telephone (301) 921-2045. Orders should give the amount (number of units), catalog number and name of

the standard requested. For example: 1 each, No. llh,

Basic-Open-Hearth Steel, 0.2 percent C. These materials

are distributed only in the units listed. 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. Back-order's are not

accepted for out-of-stock materials; if a renewal lot of

material is available, it will be furnished automatically.

Terms

Prices are given in the SRM Price List. These prices

are subject to revision and orders will be billed for prices

in effect at the time of shipment. New SRM Price Lists, when issued, are sent to users who have made purchases

during the preceding twelve months, and to persons or organizations who request them. No discounts are given on purchases of Standard Reference Materials. Remittances of the purchase price need not accompany purchase orders. Payment of invoices is expected

within 30 days of receipt of an invoice. Payment on

foreign orders may be made by any of the following:

(a) UNESCO coupons,

(b) banker's draft against 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 (only if material is shipped Collect).

If we ship material (Prepaid) International Air Parcel

Post, we cannot furnish receipt.

Domestic Shipments

Shipments of material (except for certain restricted categories, e.g., hydrocarbons, special nuclear materials,

compressed gases, rubber, rubber compounding materials, and radioactive standards) intended for the United

States, Mexico, and Canada are normally shipped pre- paid (providing that the parcel does not exceed the weight limitations as prescribed by Postal Laws and

Regulations) unless the purchaser requests a different mode of shipment, in which case the shipment will be

sent collect. The Bureau does not prepay such shipping

charges. Hydrocarbons, organic sulfur compounds, compressed gases, rubber, rubber compounding materials, radioactive standards, and similar materials are shipped

express collect.

Foreign Shipments

Orders for small weight shipments will be shipped by

prepaid International Air Parcel Post. Other shipments

will be shipped prepaid International Parcel Post, except

those shipments exceeding the parcel post weight limitations, which must be handled through an agent (shipping

or brokerage firm) located in the U.S.A. as designated by

the purchaser. Shipments handled through an agent will be packed for overseas shipment and forwarded via express collect to the U.S.A. firm designated as agent.

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

2
Introduccion

Todo el Material de Referenda de Normas (Standard

Reference Materials—SRM's), Material de Investigation

(Research Materials—RM's), y Material General (General

Materials—GM's), que figura en este Catalogo lleva nombres y numeros que lo identifican en forma permanente. Cada SRM, RM o GM designado en forma

especifica, tiene caracten'sticas identicas a las de todas

las demas muestras que llevan la misma designation,

dentro de los limites que requiere el uso al cual esta destinada; o, en caso necesario, se le asigna un numero

de serie y una calibration individual. Los primeros SRM's emitidos por la Direction fueron un grupo de minerales, hierros y aceros certificados en cuanto a su composition qui'mica, y se tomo la costumbre de llamarlos "muestras de normas" (standard

samples). En la actualidad se cuenta con mas de 900

SRM's que cubren una amplia gama de propiedades

qufmicas y fi'sicas, y la designation "Material de Refer- encia de Norma" (Standard Reference Material) es mas

apropiada. A medida que ha aumentado el numero de

SRM's, ha aumentado la diversidad de estos, establecien- dose nuevos grupos, tales como normas para laboratories

ch'nicos, materiales nucleares, normas de viscosidad de

vidrio, normas para goma y compuestos para goma, normas de colores, asi como normas de grosor de

revestimiento. Estos grupos figuran bajo los encabezamientos: Normas de Composition Qui'mica Certificada (Standards of Certified Chemical Composition), Normas

de Propiedades Fi'sicas Certificadas (Standards of Certi- fied Physical Properties), Normas de Tipo de Ingenien'a

(Engineering Type Standards), Materiales de Investigation (Research Materials), o Materiales Generales (General Materials). Los grupos de materiales que corre- sponden a estos ti'tulos generales aparecen en el Indice de Materias. Un indice alfabetico indica la ubicacion de

determinado material. Un indice numerico ofrece la fecha del Certificado vigente emitido con los materiales en cuestion. La lista detallada de materiales indica la certification nominal para la cual se emite el material, pero es necesario consultar el Certificado para encontrar la certification precisa. Se emite SRM's para los cuales no

es factible suministrar valores numericos o para los cuales tal certification no sen'a util. Estos SRM's ofrecen

la seguridad de que son identicas todas las muestras que

llevan la misma designation, lo cual permite normalizar

los procedimientos de prueba y referir a una base comun

los datos fi'sicos o qui'micos de materiales desconocidos.

Norma de Renovacion y Descontinuacion

Materiales de Referenda

Se tiene el proposito de completar la preparation de SRM's "de renovacion" para cuando esten agotadas las existencias de cada clase de material, pero esto no es

siempre posible. Por lo general, el material de renovacion no sera identico a su predecesor, pero sera bastante

similar, en especial en lo que a las caracteristicas certificadas se refiere, y por lo general la renovacion

puede ser utilizada en lugar de su predecesor. Por

ejemplo, en 1909, cuando se preparo el primer acero Bessemer con 0.1 por ciento de carbono, 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

"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 renovacion de acero Bessemer con

0.1 por ciento de carbono. Si bien cada uno de estos

lotes difiere en algo en cuanto a analisis detallado entre

lote y lote, todos ellos tienen el nivel relativamente alto de contenido de fosforo, azufre, nitrogeno y metal de

baja aleacion que es caracten'stico 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 encuentra disponible una

fuente alternativa de suministro de determinado material, es posible que la production sea descontinuada en forma permanente, o hasta que se obtenga justification

suficiente para una renovacion.

Nuevo Material de Referenda de Normas

De cuando en cuando se emite nuevos SRM's, los cuales son anunciados mediante suplementos semestrales de este Catalogo, por el NBS Technical News Bulletin,

mediante informativos enviados a publicaciones cienti'fi- cas, tecnicas y del ramo, asi como directamente a los usuarios en potencia.

Suplementos de Catalogo

Por lo general, las Listas de Precios y Disponibilidad

de SRM's (SRM Price and Availability List) son preparadas semestralmente para mantener al di'a el Catalogo. Estos suplementos ofrecen una lista completa de los SRM's disponibles, asi como sus precios, y dan la description de SRM's emitidos desde que fuera impreso

el ultimo Catalogo.

Pedidos

Los pedidos deberan ser hechos a la siguiente direc- tion:

Office of Standard Reference Materials Room B3 1 1 , Chemistry Building

National Bureau of Standards

Washington, D.C. 20234

El telefono es (301) 921-2045.

3
En los pedidos se debera indicar el numero de uni- dades, numero y nombre del SRM. Por ejemplo: 1 muestra. No. 1 lh, Acero Siemens-Martin Basico, 0.2 por

ciento C. Estos materiales son distribuidos solamente en

las unidades que figuran en la lista. Pedidos que se recibe por materiales "agotados" son

cancelados y devueltos si se ha pedido solamente

arti'culos agotados. En caso contrario, se remite los materiales disponibles y se cancela los materiales agotados. No se acepta pedidos retroactivos por materiales agotados; si un lote de material de renovation esta disponible sera suministrado en forma automatica.

Condiciones

Los precios aparecen en la Lista de Precios y

Disponibilidad de SRM's (SRM Price and Availability

List). Estos precios estan sujetos a cambio y se facturara

los pedidos a los precios que esten en vigencia en el momento en que se hace el embarque. Al ser emitidas las nuevas Listas de Precios y Disponibilidad, son enviadas a

los usuarios que han hecho compras en el curso de los doce meses precedentes, y a las personas u organizaciones que las solicitan. No se hace descuentos en las compras de Materiales de Referencia de Normas.

Ordenes de compra no necesariamente tienen que ir acompanadas del valor de la compra. Se espera que las facturas sean pagadas a los treinta di'as de recibidas. El pago de pedidos desde el extranjero se puede hacer mediante cualquiera de los siguientes:

(a) cupones de la UNESCO,

(b) giro bancario contra un banco estadounidense,

(c) transferencia de banco a un banco en los Estados

Unidos,

(d) carta de credito* en un banco en los Estados

Unidos, o

(e) Giro Intemacional.

Suele requerir 8 semanas procesar facturas pro-forma, y seran suministradas solamente a aquellos que requieren

de tal servicio.

*Se pueden emplear letras de credito para pagos por

adelantado de los SRM. Se aceptaran unicamente letras de credito de bancos en los Estados Unidos. A continuation se indican los unicos documentos que habremos de

suministrar:

(1) Seis Facturas Comerciales

(2) Lista de Embalaje

(3) Certificado de Origen

(4) Factura de Embarque Aereo (solamente si el material se remite contra reembolso). No

podemos suministrar un recibo cuando remitimos

por el Servicio Postal Aereo Intemacional (porte

pagado).

Remesas dentro del Pats

Los materiales (a exception de ciertas categories

restringidas, por ejemplo hidrocarburos, materiales nucleares especiales, gases comprimidos, compuestos

organicos de azufre y muestras radioactivas) destinados a

los Estados Unidos, Mexico y el Canada, por lo general son remesados con porte pagado (siempre y cuando que

el paquete no exceda las limitaciones prescritas por las Leyes y el Reglamento Postal), a no ser que el comprador solicite una forma de embarque diferente, en cuyo caso se enviara con flete por pagar. Esta Direction no paga por tales fletes. Hidrocarburos, compuestos

organicos de azufre, gases comprimidos, materiales para compuestos de goma, muestras radioactivas y material

similar, son remitidos por expreso con flete por cobrar.

Embarques al Extranjero

Embarques de poco peso por valor de mas de $100

dolares con porte pagado seran enviados por encomienda

aerea con flete pagado. Los embarques que excedan las limitaciones -de encomienda postal deberan ser manejados por intermedio de un agente (empresa de trans- portes o corredor) ubicado en los Estados Unidos, segun

indicacion del comprador. Tales paquetes seran embalados para embarque man'timo y remesados como

expreso por cobrar a la empresa en los Estados Unidos

que ha sido designada como agente.

Pedidos que no han sido pagados seran embarcados

con flete pagado por Encomienda Postal Intemacional,

sujeto a limitaciones en cuanto a tamano, peso y

categon'a de material. Cualquier otra forma de embarque

solicitado por un cliente debera ser pagada por ese

cliente. (Embarques que por cualquier motivo sean

exclui'dos de remesa por Encomienda Postal Intemacional deberan ser manejados por intermedio de un

agente [empresa de transporte or corredor] ubicado en

los Estados Unidos, segun indicacion del comprador.)

Tales paquetes seran embalados para embarque man'timo

y remesados como expreso por cobrar a la empresa en

los Estados Unidos que ha sido designada como agente.

Nota: Pedidos y consultas presentados en idioma ingles seran tramitados en forma mas rapida que aquellos que

requieren traduction.

Avant-Propos

Toutes les mesures etalon des materiaux classes dans

la categorie SRM (Standard Reference Material) celles des materiaux de recherche ou RM (Research Material),

et celles des materiaux divers ou GM (General Material)

repertories dans ce catalogue se sont vus attribuer une

designation et un numero de reference distincts afin de

les identifier a titre permanent. Chacun des materiaux

tombant dans les categories SRM, RM ou GM est

4
identique en ce qui concerne sa caracterisation a tout

autre echantillon de meme designation, compte tenu des

tolerances etablies pour son usage. Si necessaire, le materiau recoit un numero de serie et un calibrage

individuel. Les titrages des premiers SRM etablis par le Service des Poi'ds et Mesures concernaient certains minerais, du

fer et des aciers qui, par la suite, devaient etre designes sous le nom de "echantillon-type" (Standard samples). A

l'heure actuelle, il existe plus de 900 SRM aux proprietes

chimiques et physiques tres variees. II est done apparu

plus.approprie de les designer sous le nom de "Mesures

etalon pour materiaus repertories" (Standard Reference

Materials). Au fur et a mesure que le nombre de SRM

augmentait il en etait de meme de la diversite des

nouvelles categories de normes a etablir pour, par exemple: les laboratoires medicaux, les materiaux nucleaires, la viscosite dynamique du verre, le caoutchouc et

ses derives, les produits colorants et l'epaisseur des

enduits et revetements. Des rubriques speciales ont ete

etablies a cet effet: Normes de composition chimique

(Standards of Certified Chemical Composition); Normes

de proprietes physiques (Standards of Certified Physical

Properties); Normes d'Engineering (Engineering Type

Standards); Materiaux de recherche (Research Materials); ou Materiaux divers (General Materials). Les categories

de materiaux repertories sous ses rubriques sont indi- quees a la table des matieres. II suffit de consulter

l'index presente par ordre alphabetique pour trouver la page se rapportant a un materiau particulier. Un index

numerique fournit la date de delivrance du brevet correspondant aux normes exigees pour tel ou tel materiau.

La liste detaillee des materiaux constituant une

homologation a caractere purement nominal, il est necessaire de consulter le brevet delivre pour chacun des materiaux par le Service des Poids et Mesures. II existe cependant un certain nombre de SRM pour lesquels il est impossible de fournir des valeurs numeriques ou pour

lesquels une telle certification serait inutile. Ces SRM

sont identiques aux autres echantillons de meme

designation. lis permettent d'une uniformisation des methodes experimentales et dans le cas de materiaux

inconnus de se baser suf des donnees de physique ou de

chimie communes.

Mises a jour et discontinuation des normes

Materiaux repertories

La mise a jour de la liste concernant les SRM doit en

principe etre terminee lorsque les stocks de chaque lot de materiaux sont epuises, cela n'est toutefois pas

toujours possible. Habituellement le nouveau lot n'est pas rigoureusement identique au precedent mais en est cependant tfes proche, ses specifications etant les memes

si bien qu'en regie generale il peut etre utilise en

remplacement du lot precedent. Par exemple, lorsque le premier lot d'acier Bessemer a 0,1% de teneur en

carbone a ete prepare en 1909, il s'appelait a l'epoque

"Standard Sample No. 8". Les lots ' suivants furent

designes 8a, 8b, etc . . . Le SRM 8j., actuellement en

stock correspond au dixieme lot de lingots Bessemer

fabriques a partir d'une teneur en carbone de 0,1%. Bien

que chacun de ces lots differe quelque peu les uns des

autres, si on les analyse en detail Ton constate qu'ils

comportent tous une teneur relativement elevee en

phosphore, souffre et azote ainsi qu'une faible proportion d'alliage, caracteristique a ce type de materiau. Pour

les raisons exposees ci-dessus, il n'est done pas possible de fournir des lingots appartenant a une serie precedente

epuisee. De surcroit, si la demande pour un type de materiau donne est marginale ou si une autre source d'approvisionnement est disponible pour tel ou tel materiau, la production peut alors en etre suspendue a

titre permanent ou jusqu'a ce qu'un renouvellement des

stocks soit justifie.

Etablissement de normes pour nouveaux

materiaux repertories

Les mises a jour relatives aux SRM se font de temps a autre et sont publiees dans les supplements semestriels de ce catalogue, dans le NBS Technical News Bulletin ou

dans des articles paraissant dans des revues scientifiques,

techniques ou commerciales ou encore directement

portees a la connaissance de futures personnes interessees.

Supplements du Catalogue

Les tarifs et listes de materiaux SRM disponibles sont (SRM Price and Availability List), en regie generale,

publies semestriellement afin que le catalogue demeure a jour. Ces supplements fournissent une liste complete des SRM disponibles et des tarifs en vigueur ainsi que les specifications des SRM repertories depuis la derniere publication du catalogue.

Modal ites de commande

Les lettres et bordereaux de commande doivent etre adresses 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 specifier la quantite

desiree (nombre unitaire), le numero de reference du

catalogue ainsi que les specifications et titrage. Exemple:

Qte. 1, Ref.: no. 1 lh, Acier sur sole basique a teneur de

0,2% de carbone (en anglais, de preference). Les bordereaux de commande recirs pour des materiaux dont les stocks sont epuises sont annules et renvoyes a leur expediteur si tous les articles demandes

5
sont hors stock. Dans ce cas, seuls les materiaux

disponibles sont expedies. Les soldes de commande ne

sont pas honores pour ce qui concerne les materiaux

dont les stocks sont epuises, si un lot est renouvele, le materiau est alors expedie automatiquement.

Conditions de paiement

Les tarifs en vigueurs relatifs aux SRM figurent a cote de la liste des materiaux disponibles (SRM Price and

Availability List). Ces tarifs sont sujets a revision et les factures sont etablies en fonction des tarifs applicables au moment de l'expedition de la commande. Les tarifs et

listes de materiaux en stock sont addresses aux clients ayant passe commande dans les douze mois ayant

precede l'establissement de ces tarifs et listes, ainsi qu'aux personnes ou organisations en sollicitant l'envoi. Aucun rabais n'est consenti sur les commandes de SRM.

Pour toute firme il n'est pas necessaire de joindre le reglement au bordereau de commande. Cependant les factures doivent etre reglees dans les 30 jours suivant

leur reception. Les commandes passees a l'etranger

peuvent etre reglees de la maniere suivante:

(a) Coupons UNESCO

(b) Lettre de change a l'ordre d'une banque americaine

(c) Transfert de banque a banque dans un etablis- sement americain.

(d) Lettre de credit a l'ordre d'une banque americaine

(e) ou par mandat international.

L'etablissement de factures pro-forma entraine fre- quemment un delai de 6 a 8 semaines. Elles ne seront

fournies que sur demande expresse des interesses.

*Les lettres de credit peuvent s'utiliser pour payer SRM en avance. Les lettres de credit seront acceptees

seulement lorsqu'elles proviendront de banques sises aux

Etats-Unis. Voici la liste des seuls documents que nous

fourniront:

(1) six factures commerciales;

(2) liste de colisage;

(3) certificat d'origine;

(4) feuille d'expedition aerienne (seulement si le materiel est expedie contre remboursement). Si nous expedions le materiel (franco de port) par

colis postal aerien international, nous ne pouvons

pas fournir de recus.

Expeditions a destination du continent nord-americain

Les expeditions de materiaux (a l'exclusion toutefois de certaines categories faisant l'objet de restrictions tels que: hydrocarbures, materiaux nucleaires speciaux, gaz

comprimes, composes de souffre organique, etalons pour

matieres radio-actives) a destination des Etats-Unis, du

Mexique et du Canada sont en general reglees d'avance (a conditon que le colis n'excede pas les limites des poids

fixees aux termes des reglements postaux en vigueur) et sauf si le destinataire desire un mode d'envoi different,

auquel cas le colis est expedie contre remboursement, et en expres.

Expeditions a l'etranger

Les colis legers dont la valeur excede $100 et dont le contenu a ete regie d'avance seront expedies par la poste

aerienne avec la mention "marchandise reglee". Les

expeditions de materiaux dont le poids excede les limites

fixees pour l'envoi de colis postaux doivent etre faites par l'intermediare d'un agent maritime ou d'un transitaire ayant ses bureaux aux Etats-Unis et designe par le destinataire. Les colis seront emballes specialement pour

envoi a l'etranger et expedies en expres et contre remboursement a la firme americaine agissant en qualite

de Transitaire. L'expedition des commandes non encore reglees se fera par colis postal, regime international, et compte tenu

des restrictions imposees, sur le volume, le poids et les categories de materiaux, par le Service des Postes. Tout

autre mode d'expedition sollicite par un client doit etre

regie directement par ses soins. (Les expeditions ne pouvant etre faites pour une raison quelconque par colis postal, regime international, devront etre confiees a un

agent maritime ou a un transitaire dont les bureaux sont

installes aux Etats-Unis et designe par le destinataire. Ces

colis seront specialement emballes pour expedition a l'etranger en expres et contre remboursement a la firme

americaine agissant en qualite de transitaire.

N.B. Les commandes et demandes de renseignements

redigees en anglais seront satisfaites plus rapidement que

celles exigeant une traduction.

Katalog der Standard-Nachweis-Materialien

Alle Standard-Nachweis-Materialien (Standard Refer- ence Materials oder SRM's), Forschungs-Materialien

(Research Materials oder RM's) und Allgemein-Materialien (General Materials oder GM's) die in diesem

Katalog aufgefuehrt sind tragen unterschiedliche Namen

und Nummern durch welche sie jederzeit identifizierbar

sind. Jedes SRM, RM oder GM das eine gewisse

Kennzeichnung traegt hat dieselben Eigenschaften wie

jede andere Probe versehen mit derselben Kennzeichnung innerhalb der Nachweisgrenzen die fuer einen

bestimmten Zweck angegeben sind; andernfalls wird

einer solchen Probe zweckbedingt eine Seriennummer als auch eine individuelle Eichung zugeteilt.

Die ersten vom Normamt (National Bureau of Standards oder NBS) herausgegebenen SRM's waren eine

6
Reihe von Erzen, verschiedene Eisen und Staehle alle bescheinigt mit Bezug auf die jeweilige chemische

Zusammensetzung, so dass im Laufe der Zeit diese Materialien als "Normproben" (Standard Samples) allge- mein bekannt wurden. Zur Zeit sind ueber 900 SRM's

verfuegbar die ein weites Gebiet chemischer und physikalischer Eigenschaften umfassen, auf Grund dessen die Bezeichnung "Standard-Nachweis-Material" sachgemaesser ist. Ebenso wie die Anzahl der SRM's zugenommen

hat so ist auch derer Vielseitigkeit angestiegen: Neue

Arten von Normproben wie z.B. klinische Labornormen,

Kerntechnische Materialien, Normen zur Bestimmung

der Glasviskositaet, Gummi-und Gummiverarbeitungs—

Materialien, Farbnormen, als auch Normen zur Oberflae- chenschichte-Dichtemessung, sind inzwischen heraus- gebracht worden. Derartige Gruppen von StandardNachweis-Materialien sind hierbei unter den folgenden

Ueberschriften angegeben: Proben mit amtlich bescheinigter chemischer Zusammensetzung (Standards of

Certified Chemical Composition), Proben mit attestier- ten physikalischen Eigenschaften (Standards of Certified Physical Properties), Kontroll-Proben mit Pruefungszeugnis fuer Anwendungen in der Technik (Engineering Type

Standards), Forschungs-Materialien (Research Materials)

und Allgemein-Materialien (General Materials). Die

Gruppen von Materialien die diesen Kategorien zugehoeren sind in dem Inhaltsverzeichnis angegeben. Ein

alphabetisch angeordneter Index gibt die Stelle jedes

gewissen Materials oder auch jeder Gruppe aehnlicher

Materialien an. Ein Nummerindex gibt das Datum des

gueltigen Beglaubigungs-Zeugnisses an das jedem dieser Materialien zugeschrieben ist. Die ausfuehrliche Anordnung dieser Materialien gibt

den nominellen Richtwert an der dem entsprechenden

Material zugesprochen ist; trotzdem muss in jedem

einzelnen Falle das originale Beglanbigungs-Zeugnis fuer den rechtmaessigen Richtwert in Anbetracht gezogen

werden. Eine Anzahl von SRM's werden angeboten fuer

die es nicht moeglich ist entweder einen Zahlenwert

(Eichwert oder Richtwert) in dem Pruefungzeugnis

anzugeben oder fuer die eine derartige Beglaubigung von

fraglichem Vorteil ist. SRM's dieser Art gewaehrleisten

die Identitaet aller Proben die mit ein und derselben Kennzeichnung versehen sind und demzufolge ermoe- ghchen die Normung von Versuchsverfahren als auch

Bezugnahme auf eine gemeinsame Grundlage von physikalischen und chemischen Daten hinsichtlich unerforschter Materiahen.

Erneuerung und Ausscheidung von

Standard-Nachweis-Material ien

Die Vorbereitung von "Erneuerungs" SRM's ist meistens dann abgeschlossen wenn bei einem gewissen

Zeitpunkt der vorhandene Betrag eines jeden Materials

erschoepft ist; das ist jedoch nicht immer moeglich. Im

allgemeinen ist das neuere Material dem aelteren Vorlaeufer nicht unbedingt identisch; trotzdem werden sie sich beiderseits sehr aehnlich sein besonders in Bezug auf

die Eigenschaften fuer die das jeweilige SRM bescheinigt

ist, so dass man im allgemeinen das neuere Material an

Stelle des aelteren Materials benutzen kann. Zum Beispiel: Als der erste 0,1 Prozent Kohlenstoff Bessemer

Stahl im Jahre 1909 vorbereitet wurde, erhielt diese Analysen-Kontrollprobe die Kennzeichnung "Standard

Sample No. 8". Im Laufe der folgenden Jahre wurde

eine Anzahl von Erneuerungsproben, gekennzeichnet 8a,

8b, u.s.w., vorbereitet. SRM 8j ist inzwischen erhaeltlich und dieses Material ist daher die zehnte Erneuerungsprobe des 0,1 Prozent Kohlenstoff Bessemer Stahls. Waehrend sich jede dieser Stahlschmelzen in Anbetracht

der Richtanalyse von der anderen wenn auch nur gering

unterscheidet, so enthaelt jede dieser Schmelzen den

relativ hohen Gehalt an Phosphor, Schwefel und Stick- stoff und einen niedrigeren Prozentsatz an Legierungsmetallen der kennzeichnend fuer diese Art Material ist. Es ist nicht moeglich vorangegangene Nummern einer gewissen SRM-Emeuerungs-Serie zu liefern sobald der Vorrat eines solchen Materials aufgebraucht ist. Sofern nur geringe Nachfrage besteht, oder eine andere Liefer- ungsquelle fuer eine bestimmte Analysen-Kontrollprobe

verfuegbar ist, so kann die Vorbereitung bei NBS eines solchen Materials entweder ganz eingestellt oder vorue- bergehend unterbrochen werden bis ausreichender

Grund vorhanden ist, eine Erneuerung desselben zu

rechtfertigen.

Neue Standard-Nachweis-Material ien Von Zeit zu Zeit werden neue SRM's herausgegeben

die durch halbjaehrige Nachtraege zu diesem Katalog

bekannt gemacht werden. Neuerscheinungen dieser Art werden ebenso zur Kenntnis gebracht durch das "NBS

Technical News Bulletin" als auch durch Veroeffentlichungen in verschiedenen wissenschaftlichen, technischen

Fachschriften und Fachhandelsblaettern sowie Ankuendigungen direkt gerichtet an Kunden und interessierte Kaeufer.

Katalog Nachtraege

Eine SRM Preisliste mit Lieferungsverzeichnis (SRM

Price and Availabihty List) wird gewoehnlich halbjaehrUch veroeffentlicht um den Katalog auf dem laufenden

zu halten. Derartige Nachtraege bieten ein vollstaendiges

Verzeichnis aller verfuegbarer SRM's und deren Preise und enthalten Beschreibungen derjenigen SRM's die nach dem Druck des letzten Katalogs herausgegeben

sind.

7
Bestellungen

Bestellungen muessen an die

Office of Standard Reference Materials

Chemistry Building, Room B311

National Bureau of Standards

Washington, D.C. 20234

gerichtet werden. Telefon: (301) 921-2045.

Bestellungen muessen die Anzahl (Menge jeder ein- zelen Probe) und Bezeichnung (Nummer und Namen)

des gewuenschten Standard-Nachweis-Materials angeben.

Zum Beispiel: Ein, No. llh, Siemens Martin Stahl, 0,2 Prozent C. Wir bitten, Bestellungen in Englisch zu

erhalten, sofern moeglich. In diesem Falle lautet die obige Bestellung folgendermassen: "1 each, No. llh,

Basic-Open-Hearth Steel, 0.2 percent C." Diese Materialien sind nur in den beschriebenen Menge-Einheiten

erhaeltlich. Erhalt einer Bestellung bei NBS schliesst keinerlei Vereinbarung ein mit irgendwelchen Bedingungen denen

in besagter Bestellung Ausdruck gegeben ist, insofern als solche Bedingungen im Gegensatz zu den Vorschriften,

ueblichen Handhabungen und Regulierungen des National Bureau of Standards oder der U.S. Regierung

stehen. Bestellungen fuer Materialien die aus dem Handel

gezogen sind werden als ungueltig erklaert und an den

Kunden zurueck geschickt sofern nur Bestellungen fuer nicht mehr erhaeltliche Proben bei NBS in Empfang

genommen werden. Bei anderen Bestellungen werden die im Lager vorhandenen Materialien geliefert und die gegebenenfalls nicht mehr vorhandenen Materialien ein- fach gestrichen. Gleichermassen, Nachbestellungen von

Materialien nicht mehr auf Lager koennen nicht angen- ommen werden; sobald eine Neuausgabe eines angefor- derten Materials verfuegbar ist wird dasselbe unverzueglich geliefert.

Zahlungsbedingungen

Preise sind in der SRM Preis- und Lieferungliste (SRM

Price and Availability List) angegeben. Die genannten

Preise werden von Zeit zu Zeit einer Beruecksichtigung

unterzogen und Bestellungen werden berechnet zu den

Preisen in Geltung zur Zeit des Versands. Neu veroeffentlichte SRM Preis-und Lieferungslisten werden an Kunden geschickt die in den vergangenen zwoelf Monaten ein Material angefordert haben. Diese Listen sind ebenso erhaeltlich bei Privatpersonen oder Betrieben die dafuer Antrag stellen. Wir moechten darauf hinweisen,

dass wir keinen Rabatt auf Standard-Nachweis-Materialien irgend welcher Art gewaehrleisten koennen.

Zahlung braucht einer Bestellung nicht beizuliegen.

Zahlung wird innerhalb von 30 Tagen nach Erhalt der Rechnung erwartet. Zahlungen fuer Bestellungen aus dem Ausland koennen wie folgt verschiedentlich gehandhabt werden:

(a) durch UNESCO Coupons,

(b) durch Bankbezug gegen eine Bank in den U.S.A.,

(c) durch Bankueberweisung an eine Bank in den

U.S.A.,

(d) mittels Kreditbrief* an eine Bank in den U.S.A.,

oder

(e) durch eine Internationale Geldueberweisung.

Pro-forma Abrechnungsdienst nimmt gewoehnlich 6

bis 8 Wochen in Anspruch und wird nur auf Antrag

geleistet.

*Kreditschreiben koennen als Vorauszahlung fuer den

Kauf von SRM's angewandt werden. In diesem Falle werden Kreditschreiben nur von Banken in den Vereinigten Staaten angenommen.

Aufgefuehrt sind hier nur diejenigen Dokumente die wir in einem solchen Falle verfuegbar machen

(1) Sechs handelsuebliche Warenrechnungen

(2) Verpackungsliste

(3) Ursprungszeugnis

(4) Rechnung des Versands durch Luftpost (nur wenn die Ware per Nachnahme verschickt wird).

Wenn wir Materialien (mit Vorausbezahlung)

durch Internationale Luft-Paketpost verschicken,

koennen wir nicht eine Empfangsbestaetigung

liefern.

Inlandversand

Versand von Materialien (mit Ausnahme von gewissen

Beschraenkungen, wie z.B. der Versand von Kohlenwasserstoffen, besonderen Materialien der Kerntechnik, ver- dichteten Gasen, Gummi und Gummi-Verarbeitungsmaterialien, als auch radioaktive Probematerialien) innerhalb

der Vereinigten Staaten, Mexiko und Kanada geschieht

normalerweise unter Vorauszahlung (solange die Liefer- ung nicht entsprechende Gewichtsbegrenzungen der Postvorschriften ueberschreitet). Andernfalls, sollte der Kunde eine andere Weise des Versands verlangen, dann

wird die Ware so versandt dass sie bei Empfang zahlbar

ist. Das Normamt leistet keine Vorauszahlungen derartiger Versagdspesen. Kohlenwasserstoffe, organische

Schwefelverbindungen, verdichtete Gase, GummiVerarbeitungsmaterialien, radioaktive Stoffe und aehnliche Materialien werden per Express geliefert, mit

Versandkosten zu Lasten des Empfaengers, zahlbar bei

Erhalt.

8
Ueberseeversand

Lieferungen von nur geringem Gewicht werden als Versandspesen-vorausbezahlte Bestellung per internationale Paket-Luftpost befoerdert. Lieferungen anderer Art werden als Versandspesenvorausbezahlte Ware durch

internationale Paketpost befoerdert. Eine Ausnahme

sind Lieferungen die gewisse Paketpost-Gewichtsbestimmungen ueberschreiten; diese muessen durch eine von dem Kunden beauftragte Agentur (Versand-oder Maklerfirma), ansaessig in den U.S.A., gehandhabt werden.

Solche von einem Agenten vollzogenen Bestellungen die fuer den Ueberseeversand bestimmt sind werden ent- sprechend verpackt und via Express an den von dem

Kunden angeforderten Vertreter in den U.S.A. weitergeleitet, zahlbar durch den Agenten an Erhalt der

Lieferung.

Anmerkung: Bestellungen und Anfragen koennen

schneller bearbeitet werden wenn sie auf Englisch

erfolgen im Bergleich zu solchen, die eine Uebersetzung

erfordern.
STANDARDS OF CERTIFIED CHEMICAL COMPOSITION

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 16- and 40-mesh sieves, prepared from selected portions of commercial ingots.

Plain Carbon Steels

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

1 Grav

! Comb Si

8j Bessemer (Simulated), 0.1C 0.081 0.505 0.095 0.077 0.058

10g .240 .850 .086 0.109 .109 .020 llh BOH, 0.2C .200 .510 .010 .026 .21, 12h BOH,0.4C .407 .842 .018 .027 .235 13g BOH.0.6C .61 .85 .006 .031 .35 5

14e BOH, 0.8C .753 .404 .008 .039 .177 15g BOH,0.1C .094 .485 .005 .026 .095 16e BOH, 1.1C 1.09 .381 .028 .029 .202 19g AOH, 0.2C 0.223 .554 .046 .032 .033 .186 20g AISI 1045 .462 .665 .012 .028 .305

51b Electric Furnace 1.2C ., 1.21 .573 .013 .014 .014 .246 65d 0.264 .730 .015 .010 .010 .370 152a BOH, 0.5C (Tin bearing) .486 .717 .012 .030 .202 178 Basic Oxygen 0.4C .395 .824 .012 .014 .163 335 BOH 0.1C (Carbon only) 300g .092 336 Cr-V, 0.6C (Carbon only) .567 337 BOH 1.1C (Carbon only) 300g 1.07

SRM Cu Ni Cr V Mo Co Ti Sn Al

(total) N Other

8j 0.020 0.113 0.097 0.015 0.038

10g .008 .005 .008 .007 .002 0.015

1 Ih .061 .028 .025 .001 0.004 12h .073 .032 .074 .003 .006 (0.038) .006

13g .066 .061 .050 .001 •04 8

14e .072 .053 .071 .002 .013 .060 15g .036 .017 .028 .001 16e .052 .072 .118 .002

19g .093 .066 .374 .012 .013 0.012 0.027 0.008 .031 Nb 0.026

20g .034 .034 .036 .002 .008 .040

51b .071 .053 .455 .002 .014 .008 .011 65d .051 .060 .049 .002 .025 .004 .059 .013 A1 2 03 0.009 152a .023 .056 .046 .001 .036 .032 178 .032 .010 .016 .001 .003 335 336

337

10
Low Alloy Steels

Chemical Composition (Nominal Weight Percent)

Type (Other

Forms) c Mn P

Grav

3 Comb Si Cu Ni

0.49 0.79 0 010 0.010 0.28 0.76 0.071

.409 .798 .008 0.022 .021 .278 .127 1.19 .173 .537 .006 .010 .011 .253 .123 3.58 .114 .404 .007 .019 .258 .179 0.203

.301 .545 .014 .024 .024 .256 .062 .055

.397 1.89 .023 .029 .028 .210 .064 .030

.193 ( 60)

.326 0.506 .008 .016 .017 .274 .117 .217

.028 .278 .029 .008 2.89 .071 .038

.125 .769 .076 .245 0.020 .013 .251 .404 .780 .013 .019 .019 .241 .096 .510

.905 1.24 .015 .010 .011 .322 .083 .100

.383 0.66 .014 .017 .222 .042 2.00 .160 1.04 .014 .038 .39 .50 0.59

.62 1.50 .029 .009 .74 .10 .30

.87 0.25 s 01 g .02, .06 5 .24, •14 4

Cr-V(SAE6150)

Ni-Cr (SAE 3140)

Ni-Mo (SAE 4820) . . . . Cr2-Mol Cr-Mo (SAE X4130) . . .

Manganese (SAE T1344).

High-Sulfur 0.2C (Carbon only)

Cr-Mo-Al (Nitralloy G) . High-Silicon

High-Sulfur Cr-Ni-Mo (AISI 8640) . .

1134

Q0.5-W0.5

AISI 4340 661,1095,1261

AISI 94B17 (Mod) 662,1096,1262

Cr-V(Mod) 663,1097,1263

High Carbon (Mod) 664,1098,1264

Set: 1 each of 361,362,363,364, and 365, Electrolytic Iron. (SRM 365 is described on page 20.)

SRM Cr V Mo W Co Ti As Sn Al

(total) Nb Ta Zr N

30f 0.95 0.18 32e .678 .002 0.023 (0.011) 0.009 33d .143 .002 .246 (.011) 36b 2.18 .004 .996

72f 0.891 .005 .184 .009

100b

105

.063 .003 .237 .004

106b 1.18 .003 .199 1.07 125b 0.019 .008 .003 0.329 129c .014 .012 .002 139a .486 .003 .183 .008

155 .485 .014 .039 0.517 361 .69 .011 .19 (.011) 0.030 0.020 0.01 2 .01, .02! 0.022 (0.021) 0.01, (.0037) 362 .30 .040 .068 (.20) .30 (.084) (.079) (.016) (.086) (.28) (.20) (.21) (.0040) 363 1.31 .31 .028 (.047) .04, (.06) (.011) (.094) (.25) ' (.049) (.04) (.048) (.0042) 364 0.06 3

• io5 .49 (.10) .15 (.24) (.057) (.005) (.014) (.157) (.11) (.070) (.003)

SRM B Pb Sb Bi Ag Se Te Ce La Nd

361 (0.0005) «0.0001) 0.004 2 (0.0005) (0.0004) (0.004) (0.0005) (0.005) (0.001) (0.001) 362 (.0025) (.0006) .013 (.006) (.0009) (.001) (.001) (.002) (.0005) (.0005) 363 (.0010) (.0018) (.0022) (.0006) (.0032) (.0001) (.0023) (.002) (.0012) 364 (.014) .01, (.025) (.002) (.00005) (.0003) (.0002) (.0005) (.00007) (.0002)

SRM Ca Mg Zn Pr Ge O H Au Hf

361 (0.0001) (0.0002) (0.0005) (0.0005) (0.006) (0.001) K0.0005) K0.00005) (0.0002) 362 (.0003) (.0007) (.001) (.0003) (.002) (.001) «.0005) (<.00006) (.0040) 363 «.0001) (.0005) (.0004) (.0005) (.010) (.0006) «.0005) (.0006) (.0042) 364 (.00005) (.00005) (.0005) (.0001) (.003) (.0017) K.0005) (.00007) (.005)

11
High Alloy SteelsChemical Composition (Nominal Weight Percent)

Type C Mn P

Grav

j Comb Si Cu

126c High-Nickel (36% Ni) 0.026 0.47 0.004 0.006 0.19 0.040 131b Low Carbon-Silicon (Carbon only) 100 grams .0018 344 Crl5-Ni7-Mo2-All .69 .57 .018 .019 .395 .106 345 Crl6-Ni4-Cu3 .048 .224 .018 0.012 .012 .610 3.44 346 Cr22-Ni4-Mn9 .... .541 9.15 .018 .063 .239 348 Ni26-Crl5 (A286) . . .044 1.48 .015 .002 .54 0.22

SRM Ni Cr V Mo Co Ti Al Nb Ta B re

(Total) 126c 36.05 0.064 0.001 0.011 0.0(^8 131b

344 7.28 14.95 0.040 2.40 0.076 1.16 0.002

345 4.24 16.04 .041 0.122 .089 0.231 346 3.94 21.61 .058 N .441 348 25.8 14.54 .25 1.3 2.24 0.23 0.0031 53.3

Stairless Steels

Chemical Composition (Nominal Weight Percent)

SRM Type

(Other

Forms) C Mn P

S Grav Comb Si Cu

73c Crl3(SAE420) 0.310. 0.330 0.018 0.036 0.181 0.080 121d Crl7-Nill-Ti0.3(AISI 321) 1171 .067 1.80 .019 .013 .54 .121 123c Crl7-Nill-Nb0.6(AISI 348) 1172 .056 1.7, .024 .014 .59 .103 133a Q13-Mo0.3-S0.3 .120 1.03 .026 0.326 .330 .412 .118 160b Crl9-Nil4-Mo3 .046 1.64 .020 .018 i .50, .172

166c Low Carbon (AISI 3162) Carbon Only. . . .0078 339 Crl7-Ni9-Se0.2 (SAE 303Se) .052 0.738 .129 .013 .654 .199 343 Crl6-Ni2 (SAE 431) .150

SRM Ni Cr 73c 0.246 12.82 121d 11.17 17.4, 123c 11.

3

4 17.40 133a 0.241 12.89 160b 12.26 18.4S

166c

339 8.89 17.42 343 2.14 15.76

0.030

.026

.047

.058

.036

Mo

0.091

.165

.22 .294

2.38

0.248

Co

0.10

.12

.10,

.096

Ti

0.342

Nb

0.65

Ta

<0.001

Pb

0.001

Se

0.247

N

0.037

.032

.03 o

.074

12
Tool Steels

Chemical Composition (Nominal Weight Percent) oKM Type ivin r Grav Comb Si

50c W18-Cr4-Vl 0.719 0.342 0.022 0.010 0.009 0.311 0.079 132b Mo-W-Cr-V .86 5 •34 0 .01 3 .005 .18 .08, 134a Mo8-W2-Cr4-Vl .808 .218 .18 .007 .007 .323 .101 153a Co8-Mo9-W2-Cr4-V2 .902 .192 .023 .007 .007 .270 .094 291 Cr-Mo(ASTM A213) . . .177 55 0 .008 .020 •23 0 .047 293 Cr-Ni-Mo (AISI 8620) .222 960 .018 .022 •30 0 .032

SRM Ni Cr V Mo W Co Sn As N

50c 0.069 4.13 1.16 0.082 18.44 0.018 0.022 0.012 132b .23 4.38 1.84 4.9 3 6.2 8 0.028 134a .0'88 3.67 1.25 8.35 2.00 153a .168 3.72 2.06 8.85 1.76 8.47 .024 291 .065 1.33 0.53 8 Al .002 293 •48 0 0.51 0 0.004 .204 Al .039

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 material normally is sized between 25 and 200 mesh sieves to ensure

satisfactory homogeneity and is issued in 100-gram units.

Chemical Composition (Nominal Weight Percent) SRM Type C Mn P S Si Cu Ni 163

lOlf Low Alloy, 1.0 CrStainless, (AISI 304L)

0.933

.014 0.897.087 0.007

.008 0.027.008 0.488

.876 0.087.030 0.0819.96

SRM Cr V Mo W Co N As Sb Ga

163 0.982 0.029 0.007 lOlf 18.49 0.034 .(107 (0.0002) 0.088 (0.003) (0.0009) (0.004)

13
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 spectroscopic 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, 1 100,

and 1 200 series are intended for "point-to-plane" optical emission spectroscopic methods of analysis. The D800 series, and the 1 100 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 uniformity 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

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

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

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

D800 Series: 31 mm (1 1/4 in) diameter, 6.4 mm (1/4 in) thick

1 1 00 and 1 200 Series: 3 1 mm ( 1 1 /4 in) diameter, 1 9 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 satisfactory 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 requiremenst for homogeneity necessary for use with the newer microchemical methods of analysis.

These standards will be discontinued when the supply is exhausted.

Chemical Composition (Nominal Weight Percent)

SRM Type Mn Si Cu Ni Cr V Mo Sn Al

(total) Other

803a D803a Acid Open Hearth, 0.6C 1.04 0.34 0.096 0.190 0.101 0.005 0.033 404a 804a Basic Electric 0.88 .44 .050 .040 .025 .002 .007 405 a 805a D805a Medium Manganese . . . 1.90 .27 .032 .065 .037 .005 0.056 407a 807a D807a Chromium-Vanadium . . 0.76 .29 .132 .169 .92 .146 408a 808a Chromium-Nickel .... .76 .28 .10 1.20 .655 .002 .065

409b 809b D809b Nickel .46 .27 .104 3.29 .072 .002 .009 0.012 Co 0.025 810a Cr2-Mol .36 .11 0.24 2.39 .91 413 Acid Open Hearth, 0.4C .67 .22 .25 .18 0.055 .007 .006 414 Cr-Mo (SAE 4140) .... .67 .26 .11 .080 .99 .003 .32 .014 .020 417a 817a Basic Open Hearth, 0.4C .78 .13 .062 .050 .013 .036

418 Cr-Mo (SAE X4130) . . . .52 .28 .11 .96 .22 418a Cr-Mo (SAE X4130) . . . .52 .27 .040 .125 1.02 .21 420a 820a D820a Ingot Iron .017 .027 .0092 0.0032 .0013 .0017 .003 Co .006 821 Cr-W, 0.9C 1.24 .080 .10 .49 .012 .040 W .52 427 827 Cr-Mo (SAE 4150)

(Bonly) B .0027

14
Special Ingot Irons and Low-Alloy Steels

The planning of the 1 100 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 tech- nique 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 ordering instructions).

The 1200 series replaces the 1 100 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 available in three other

forms: chip form, 361-365, for chemical methods of analysis, (pages 1 1 and 28); rods, 661-665, 3.2 mm (1/8 in) in diameter and 5 1 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 28).

Chemical Composition (Nominal Weight Percent)

SRM Type (Other

Forms)

C Mn P S Si Cu Ni Cr

1134 High-Silicon 125b 0.026 0.277 0.028 0.009 2.89 0.070 0.038 0.019 1135 High-Silicon (179) .027 .094 .006 .026 3.19 .056 .050 .022 1136 High-Sulfur 129c H3 .75 s .066 220 0.018 .014 .27 .014

461 Low Alloy A .15 .36 .053 (-02) .047 .34 1.73 .13 462 Low Alloy B .40 .94 .045 (.02) .28 .20 0.70 .74 463 Low Alloy C .19 1.15 .031 (.02) .41 .47 .39 .26 464 Low Alloy D .54 1.32 .017 (-02) .48 .094 •13 s .078 465 Ingot Iron E .037 0.032 .008 (.01) .029 .019 .026 .004 466 1166 Ingot Iron F .065 .11 3 .012 (.01) .025 .033 .051 .011 467 Low Alloy G .11 .27 5 .033 (-01) .26 .067 .088 .036 468 Low Alloy H .26 .47 .023 (.02) .075 .26 1.03 .54 1169 Lead-Bearing .077 .992 .064 .318 .011 .083 .032 .015 1170a Selenium-Bearing (.052) (.738) (.129) (.013) (.654) (.199) (8.89) (17.42)

661 1261 AISI 4340 361,1095 .38 2 .66 .015 .017 .223 .042 1.99 .69 662 1262 AISI 94B17 (Mod) .... 362,1096 •160 1.04 .042 .038 .39 .50 0.59 .30 663 1263 Cr-V(Mod) 363,1097 .62 1.50 .02, .008 .74 •09 8 .32 1.31 664 1264 High Carbon (Mod) .... 364,1098 .87 0 0.25 5 •01 8 .028 .067 .24, .14 2 0.06 s 665 1265 Electrolytic Iron 365,1099 .0067 .0057 .002 5 .0059 .008 o .0058 .041 .007 2

SRM B Pb Ag Ge O N H

461 0.000 2 (0.003) (0.001 s

)

(0.001 s ) <0.02o ) (0.00J

462 .000; .006 «.0002) C003o ) (.006) (•00 8 ) 463 .0012 .012 «.0002) (.002 s

) (.007) (•006 )

464 .005 .020 (.003 2

) (.001 s ) (.006) (.00 7 ) 465 .000, «.0005) (.0002 5 ) (.003 5 ) (.003) (.00 s ) 466 1166 (.0002 ) (.001 3 ) (.0004 5 ) C003J (.005) (.00 6

) 467 (.0002 ) .0006 (•004 0 ) (0030 ) (.004) (.00 4 ) 468 .009 «.0005) «.0005) (•001 0 ) (.004) (.00 6

) 1169 .227 1170a

661 1261 .0005 .00002 5 .0004 [.006] (.0009)f (.0037)f [<0.0005]t

662 1262 .0025 .0004 3 (.0010) [.002] (-OOll)t (.004 l)f [<.0005]f 663 1263 .0009, .0022 (.0038) [.010] (•007)t (.0041)t [<.0005]| 664 1264 .011 .024 (.00002) [.003] [.0017]| [.003]| [<.0005]|

665 1265 .00013 .00001 5 (^.000002) ('VOOH) (-v0063)t (-v.OOll)f (-v.OOOl)t

15
NOTE: Values in parentheses not certified, based on a single analytical method.

Values in brackets not certified, approximate values form the heat analyses.

tFrom Gasometric Certificates: SRM's 1095 through 1099.

-Not detected, value given is conservative "Upper Limit" of detection by specific methods of analysis.

Sets: 666 Set of 2: 661 and 665

667 Set of 2: 662 and 663,

668 Set of 5: 661, 662, 663, 664, and 665

1266 Set of 5: 1261, 1262, 1263, 1264, and 1265

SRM V Mo W Co Ti As Sn Al

(total) Nb Ta Zr

1134 0.008 0.003 0.329 1135 <0.01 .014 .004 .0028 1136 .012 .002

461 .024 .30 0.012 0.26 (0.01) 0.028 .022 .005 0.011 0.002 K0.005)

462 .058 .080 .053 .11 .037 .046 .066 .02 3 .096 .036 .063 463 .10 .12 .10s •oi 3 .010 .10 .013 .02, .19 s .15 .20 464 .29 5 .029 .022 •02 8 .004 .018 .043 .005 .037 .069 .010 465 .002 .005 (.001) .008 .20 .010 .001 .19 (.001) .001 (.002) 466 1166 .007 .011 (.006) •04 6 .057 .014 .005 .01

,

.005 .002 K.005)

467 .041 .021 .20 •07 4 .26 .14 .10 .16 .29 .23 .094 468 .17 .20 .077 .16 .011 .008 .009 .04 2 .006 .005 «.005)

1169 .001 .008 1170a (.058) (.248) (.096)

661 1261 .011 .19 .01 5 .030 .020 .017 .01, .02, .022 .020 .009 662 1262 .04, 068 .21 .30 .084 .09, .016 .09 s .29 .20 .19 663 1263 .31 .030 .045 .048 .050 .010 (.095) .24 .049 (.053) .049 664 1264 .10, .49 .10 .15 .24 .05 2 [.005] (.008) .15, .11 .068 665 1265 .(1006 .0050 (^.00004) .007 0 .0006 (.0002) (^.0002) (.0007) «.00001) -«.00005) -K.00001)

SRM Sb Bi Ca Mg Se Te 1170a 0.25 661 1261 0.004 2 0.0004 K0.0001) (0.0001) 0.004 0.0006 662 1262 .012 (.002) (.0002) (.0006) [.001] (.0005) 663 1263 •001 6 (.0008) (<.0001) (.0005) [.0001] (.0022) 664 1264 (.035) (.0009) «.0001) (.0001) [.0003] [.0002] 665 1265 -K.00005) -(<.00001) -K.00001) -«.00002) -K.OOOOl) -K.OOOOl)

SRM Zn Au Ce Hf La Nd Pr Fe

661 1261 (0.0001) K.0.00005) 0.001 3 [0.0002] 0.0004 0.0003 (0.00014) (95.6) 662 1262 (.0005) K.00005) (.0011) [.006] .0004 (.0005) (.00012) (95.3)

663' 1263 (.0004) .0005 (.0016) [.0015] .0006 (.0007) (.00018) (94.4) 664 1264 .001 .0001 (.00025) [.005] .00007 (.00012) (.00003) (96.7) 665 1265 K.0001) -(<. 000002) -K.000005) -K.00002) -K.000005) -(<.000005) . -K.000005) (99.9)

16
Stainless Steels

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 applications is not recommended.

Group III are for the "point-to-plane" technique of emission spectroscopy and for x-ray spectroscopy. They

were prepared for 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 Chemical Composition (Nominal Weight Percent) SRM Name 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

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 .0(137 (.011) (.004) GROUP II Chemical Composition (Nominal Weight Percent) SRM Name Mn Si Cu Ni Cr V

445 845 D845 Crl 3-Mo0.9 (Mod. AISI410) 0.77 0.52 0.065 0.28 13.31 (0.05) 446 D846 Crl8-Ni9 (Mod. AISI 321) .53 1.19 .19 9.11 18.35 (.03) 447 D847 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

445 845 D845 0.92 (0.42) (0.03) 0.11 (0.002) 446 D846 .43 (.04) (.34) (0.02) .60 (.030) 447 D847 .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 Chemical Composition (Nominal Weight Percent)

SRM Type

(Other

Forms)

C Mn P S Si Cu Ni Cr

1152 Crl8-Nil0 0.163 1.19 0.017 0.017 0.654 0.497 10.21 18.49 1154 Crl9-Nil0 .094 1.74 .038 .033 1.09 .560 10.25 19.58 1155 Crl8-Nil2-Mo2 (AISI 316) .046 1.63 .020 .018 0.50 .169 12.18 18.45 1185 Crl7-Nil3-Mo2 (AISI 316) .11 1.22 .019 .016 .40 .067 13.18 17.09 1171 Crl7-Nill-Ti0.3 121d .067 1.8 0 .018 •01 3 .54 .121 11.2 17.4 1172 Crl7-Nill-Nb0.6 123c .056 1-7. .025 •01 4 .59 .10 5 11.3, 17.4 0

SRM V Mo Co Ti As Sn Al Nb Ta B Pb Zr 1152 0.044 0.366 (0.095) (0.12) (0.01) (0.004) (0.003) (0.20) (0.085) (0.005) (0.001) (0.03) 1154 .061 .463 (-12) (-48) (.03) (.023) (.035) (.26) (.045) (.0006) (.012) (.022) 1155 .047 2.38 .101 .001 1185 2.01 <.001 <.001 <.001

1171 0.1

6

S .10 .34 1172 .22 .12 .65 <.001

17
Specialty Steels

SRM's 1 1 56, Maraging Steel, and 1 1 58, High-Nickel Steel (Invar), are designed primarily for use in optical emission and x-ray spectrometric methods of analysis.

SRM 1 156 derives its name from the formation of martensite on age hardening. Alloys of this type are used extensively in submarines, missiles, and aircraft. SRM 1 158 has good impact toughness down to -269°C and has an extremely low coefficient of expansion be- tween -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 Percent) SRM Type C Mn P S Si Cu

1156

1158

Maraging, (Ni 19) High-Nickel (Ni 36) 0.023

.026

0.21

.47 0.011.004 0.012

.006 0.184

.19 0.025.040

SRM Ni Cr Mo Co Ti Al Zr B Ca V

1156

1158

19.0 36.030.20

•064

3.1 0.011

7.3 0.008

0.21 0.047 0.004 0.003 <0.001

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.

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

1197 M308 (0.045) (0.047) (0.008) (0.002) (0.13) 1198 Incoloy901 (.048) (.49) (.006) (.002) (-38) (0.012) 1199 L 605 (.14) 1.42 (.005) .83 1200 S 816 (.40) 1.34 (.015) .86 1201 Hastelloy X (.039) (.008) (.54) 1206-2 Ren(Ml .21, 0.030 (0.004) .006 m6 .040 1207-1 Waspaloy(l) .043 .34 .005 .009 .47 2 .026 1207-2 Waspaloy(2) .083 .295 .005 .009 .61 s .033 1208-1 Inco 718(1) .046 -38 5 .003 .01, •43 4 .14, 1208-2 Inco 718(2) .022 .230 .003 .007 .08 3 .077

SRM Ni Cr Mo Co Ti Al Nb Ta Fe W B Zr 1197 32.6 12.9 3.2 5 (0.07) 2.32 0.41 «0.02) 41.9 6.0 8 (0.0059) 0.15 1198 40.1 12.9 6.08 .70 2.59 .24 K.02) 36.2 (0.2) (.0064) (.014) 1199 10.2 19.9 «0.02) 51.6 «0.01) «.02) 0.6 5 15.4 1200 20.0 19.9 4.00 42.0 (.03) 3.1 8 1.08 3.19 3.8 6 1201 45.7 20.7 9.1, 0.56 K.oi) K0.02) 23.2 (0.15) 1206-2 53.3 19.7 10.3 0 11.5 5 2-9 4 1.7 4 0.46 1207-1 56.1 18.88 4.50 13.05 3.09 1.26 2.22 1207-2 55.7 19.44 4.34 13.5 0 2.54 1.3, 2.09 1208-1 51.9 17.5 3.2 4 0.82 0.46 (0.15) 5.3 8 (0.012) 19.2 1208-2 51.5 17.4 3.13 .76 (•8 S ) (.8S ) 4.9 8 (.012) 19.8

18
Tool Steels

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

436 Special (Cr6-Mo3-W 10) 0.21 0.32 0.075 6.02 0.63 2.80 9.7 437 837 D837 Special (Cr8-Mo2-W3-Co 3) .48 .53 7.79 3.04 1.50 2.8 2.9 438 838 D838 Mo High Speed (AIS1-SAE-M30) . . . .20 .17 .17 4.66 1.17 8.26 1.7 4.9 439 D839 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-C012) .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(AISIM2) 0.836 0.34 0.011 0.004 0.18 0.088 0.228 4.36 1.82 4.86 6.28 0.028

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 specifications. They are furnished

as fine powders, sized to about 100 mesh or finer.

Chemical Composition (Nominal Weight Percent)

SRM Type

Wt/Unit

(grams) c Mn P S Si Cu Ni

57 Refined Silicon 60 0.034 0.008 0.005 96.80 0.02 0.002 58a Ferrosilicon (73% Si) 75 0.014 .16 .01 <.002 73.2 .024 .012 59a Ferrosilicon (50% Si) 50 .04 .76 .016 48.2 .05 .03 195 Ferrosilicon (75% Si) Hi-Purity 75 .034 .17 .02 <.002 75.3 .047 .032 64b Ferrochromium (HC) 100 4.30 .208 .012 .062 1.42

196 100 0.035 .28 0.38

71 Calcium Molybdate 60

90 Ferrophosphorus 75 26.2 340 100 .060 1.71 0.035 4.39

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

57 0.025 0.10 0.67 0.025 0.73 0.01 0.65 58a .020 (0.01) .05 (.95) K.01) 25.2 0.001 <0.01 59a .08 .35 .04 50.0 .06 195 .047 (.01) .037 (.05) K.02) 23.6 .001 <.01 64b 68.03 0.15 0.033

196 70.87 .12 71 35.3 .06 1.92 90340 .89 57.51 Ta 3.73

19
Cast Irons (Chip Form — 150 gram units, unless otherwise noted)

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 in the form of chips, usually sized between 16- and 25-mesh sieves. They are prepared by lathe cutting of chips with a multiple-tooth cutting tool from thin-wall cylindrical castings es- pecially 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, 0, 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.)

Chemical Composition (Nominal Weight Percent)

SRM Type

C Total Graphitic

Mn P

S Grav Comb Si Cu

3c White (HOg) 2.30 0.308 0.100 0.096 1.28 0.053 4k Cast (In Preparation)

5L Cast 2.59 1.99 .68 .280 .123 1.83 1.01 6g Cast 2.84 2.00 1.06 .56 .123 1.06 0.50

7g Cast (High Phosphorus) 2.69 2.59 0.612 .794 0.061 .060 2.41 .128

82b Cast (Ni-Cr) 2.85 2.37 .745 .025 .007 2.10 .038 107b Cast (Ni-Cr-Mo) 2.75 1.87 .510 .058 .067 .067 1.35 .235 115a Cast (Cu-Ni-Cr) 2.62 1.96 1.00 .086 .064 .065 2.13 5.52 122e Cast (Car Wheel) 3.51 2.78 0.528 .349 .074 0.510 0.033

341 1.81 1.23 .92 .024 .007 .007 2.44 .152 342 Nodular 2.45 2.14 .369 .020 .014 .014 2.85 .14 342a Nodular 1.86 1.38 .275 .018 .006 2.73 .14 365 Electrolytic Iron 0.0070 .0057 .003 .006 0.007 6 .0058

SRM Ni Cr V Mo Co Ti As Sn

Al

(total) Mg N

3c 0.012 0.046 0.007 0.002 4k5L .086 .15 .036 .020 0.05 <0.005 0.006

6g .136 .37 .06 .035 .06 .04 .006

7g .120 .048 .010 .012 .044 .014 .004

82b 1.22 .333 .027 .002 .027 107b 2.12 .560 .008 .750 .016 (.008) 115a 14.49 1.98 .014 .050 .020 122e 0.080 (0.038) (.032) (.001) (.026) (.018) (.009)

341 20.32 1.98 .012 .010 .018 0.068 342 0.023 0.032 .005 .009 .019 .053 342a .06 .034 .020 .069 365 .041 .0072 .0006 .0050 0.0070 .0006 .0002 (0.0002) (0.0007) N .001 Pb .00002

20
Cast Steels, White Cast Irons, Ductile Irons and Blast Furance 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. 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.)

SRM

Chemical Composition (Nominal Weight Percent) 31X31X

6.4 mm Type C Mn P S Si Cu Ni Cr V Mo

1138 1139

Cast Steel (No. 1) Cast Steel (No. 2) 0.120

.792

0.43

.98 0.053

.011

0.05 3 .013 0.34

.85

0.09

.40 0.10.93

0.12

1.96 0.020

.24 0.05

.51

1140a

1141a

1142a

Ductile (No. 1) Ductile (No. 2) Ductile (No. 3)3.34

2.98 2.72

.74 .53

.17

.015 .070

.18

.013

.013

.015

2.12

1.22

3.19

.089

.212

1.02

•04 8 .57

1.6,

0.034

• 15„

.051

.034

.010

.004

.15,

.05 2 .02 2

1143 1144

1147a

1148 1149

Blast Furnace (No. 1) Blast Furnace (No. 2) White (4i) White (5L)

White (6g)

3.91 4.27

3.14

2.89

3.28

.414

1.33 0.84

.66 1.05

.158

.112

.15, .300 .564

.028

.021 .027

(.11) .127

1.68 0.276

1.32

1.82 1.04

0.144

.090

.24, .99

.49

0.115

.021 .073

.091 .138

.145 .019

.10, .146

.363

.008 .004

.026

.036

.055

(.005) .007

(.002) .022 .036

SRM Ti As Al Te Bi Ce Y Pb Mg

1140a 0.13 0.080 (0.014) (0.003) (0.06) K0.002) (0.013) 0.017 1141a .012 .03 (.013) (.00006) (.04) .040 (.0004) .04 2 1142a .007 (.01) (.088) (.00002) (-02) .01 2 (.0003) 11.

1143 .17 (.004) 0.020 1144 .44 (.004) .020 1147a .04, (.001) .03, 1148 .050 (.022) .015 1149 .062 .036 .013

21
Nonferrous Alloys (Chip Form)

These SRM's provide materials of known composition for checking the performance of chemical methods of

analysis both for production control and for customer acceptance. The aluminum-, magnesium-, and zinc-base alloys

are furnished as approximately 14- to 40-mesh chips prepared by cutting thin wall castings or wrought bar stock.

Certificates of Analysis provided with these standards give the composition as determined at NBS, and most give values obtained by industrial and other outside laboratories cooperating in certification of the standards.

Aluminum-Base Alloys

Chemical Composition (Nominal Weight Percent)

SRM Type

Wt/Unit

(grams)

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

85b

87a WroughtAl-Si

7575

0.61

.26

0.18 6.243.99 0.30 0.084

.57

0.211

.11 0.006<.01

0.022

.18 0.05 0.019.02

0.24

.61

0.021

.10

1.49 0.37 0.030

.16

Cobalt-Base Alloys

Chemical Composition (Nominal Weight Percent)

SRM Type

Wt/Unit

(grams)

Co Ni Cr Mo W Nb

168 Co4-Mo4-Nb3-Tal-W4 150 41.20 20.25 20.33 3.95 3.95 2.95

SRM Ta Fe Mn C P S Si Cu V Ti 168 0 95 3.43 1.50 0.37 0.008 0.005 0.80 0.035 0.03 0.06

Copper-Base Alloys

Chemical Composition (Nominal Weight Percent)

SRM Type Wt/Unit

(grams)

Mn P S Si Cu Ni

37e Brass, Sheet 150 69.61 0.53 124d Bronze, Ounce Metal 150 0.02 0.093 83.60 .99 157a Nickel Silver 135 0.174 .009 58.61 11.82 158a Bronze, Silicon 150 1.11 .026 3.03 90.93 0.001 184 Bronze, Leaded Tin 150 .009 88.96 .50

SRM Co As Sn Fe Al Pb Sb Ag Zn

37e 1. 00 0.004 1.00 27.85 124d 0.02 4.56 .18 5.20 0.17 0.02 5.06 157a 0.022 0.021 .174 0.034 29.09 158a .96 1.23 0.46 .097 2.08 184 6.38 0.005 1.44 2.69

Lead-Base Alloys

Chemical Composition (Nominal Weight Percent)

SRM Type (Other

Forms)

Cu Ni As Sn Sb Bi Ag Fe

53e 127b

Bearing Metal (84Pb-10Sb-6Sn) . . . Solder (40Sn-60Pb) 1132

1131

0.054

.011 0.003.012 0.057.01

5.84

39.3 10.26

0.43 0.052.06 0.01 <0.001

22
Magnesium-Base Alloys

Chemical Composition (Nominal Weight Percent)

SRM Type 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

Chemical Composition (Nominal Weight Percent)

SRM Type Wt/Unit

(grams)

C Mn P S Si Cu Ni Cr

162a 349

Monel-type (Ni64-Cu31)

Ni57-Cr20 150 150

0.079

.08

1.60 0.43 0.002 0.007 0.93

.29

30.61 0.00663.95

57.15 0.04219.50

SRM V Mo W Co Ti Al B Ca Fe Nb Ta Zr 162a

349 0.081 4.04 <0.01

0.076

13.95

0.005

3.05 0.501.23 0.0046

0.013 2.19 0.13 <0.01 <0.01 0.081

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 PowderD-C 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.

Chemical Composition (Nominal Weight Percent)

SRM Type

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

Selenium

Chemical Composition (Nominal Parts Per Million)

SRM Type

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-Base Alloys

Chemical Composition (Nominal Weight Percent) SRM Type Pb Sn Sb Bi Cu Fe As Ag Ni 54d 0.62 88.57 7.04 0.044 3.62 0.027 0.088 0.0032 0.0027

23
Titanium-Base Alloys

Chemical Composition (Nominal Weight Percent)

SRM Type

Wt/Unit

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

173a 6A1-4V 100 0.025 0.037 0.002 4.06 0.005 6.47 0.15 0.018 174 4Al-4Mn . . . 100 4.57 .015 4.27 .175 .012 176 5Al-2.5Sn . . . 100 .015 0.0008 .003 .0003 2.47 5.16 .070 .010

Zinc-Base

Chemical Composition (Nominal Weight Percent)

SRM Type

Wt/Unit

(grams)

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 0.00011

0.042

Zirconium-Base

Chemical Composition (Nominal Parts Per Million)

SRM Type

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 industries 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.

Copper-Base Alloys

Eight groups of copper-base alloy SRM's have been prepared to provide for analytical control by rapid instru- mental methods in the copper industry. These SRM's are intended primarily for calibration of optical emission and

x-ray spectroscopic equipment. These SRM's have been prepared in two forms: chill-cast form (with "C" prefix) for the producer (blocks, 31 mm square, 19 mm thick), and wrought form for the consumer (disks, 31 mm in diameter

and 19 mm thick). Both forms have nearly identical chemical compositions. Each of the eight principal copper-base

alloys are covered by three SRM's comprised of a "nominal-composition" together with a low- and a high-composition

standard. To make the cartridge-brass SRM's more widely applicable, a number of trace elements were purposely

added to and certified for these SRM's. (The low-composition cartridge -brass A, is no longer available). The beryllium copper SRM's are representative of the nominal chemical composition of three Copper and Brass Research

Association (CABRA) alloy designations.

(Values in parenthesis are not certified, but are given for information only.)

24
Copper-Base Alloys

Chemical Composition (Nominal Weight Percent) SRM Tvne 7n l U r c on INI A 1 Al oD AS

1101 cnoi V il 1 lllUgV U1 U II ...... fiQ SO ^0 "30 0 0<* 0 077 0 0 1 £ A A1 7 AU.UUUO AAAA fl A 1 1 U.U1 Z A AAA

1102 V l". 1 LI 1U UlddJ V ...... 77 97 1 0 070 01 1 -U 1 1 .uuo 00£ .UUO .UUU AAA7/

A. AC .UU4

1103 C1103 Free-Cutting Brass A . . . . 59.23 35.7 3.73 .26 .88 .16 - - -

1 1 04 fiLl 11 04U4 Th t- fi 1 1 "f i rr Drocc T3 rICc-\^UlllIlg DlabS £>.... oi .a 7^ "3 7 T*7 Z.I 1 no q A 1

.4 3 ATA .070

1 1 os pi i krpp

J

1

! ittinrt TJticc f

1 rlcc-^UllJJlg DiaaS l_ . . . . 7/1 a ") A z.u C\A A .U44 1 1 .zl A A 1 .043

1106 CI 106 Naval Brass A 59.08 40.08 0.032 .004 .74 .025 - - •-

1 1 07 iNdVdl DldSS D £ 1 7 1 01 .Zl 17 1/1 J / .34 1 Q .18 Mil 1 A/1

1 .04 AAO .098

1 1 OR P1 1 OR Naval Brass C CA 1/1 A 0 34 .4 Z .Uo3 .050 U.39 .033

1109 C1109 Red Brass A 82.2 17.4 .075 .053 .10 .10 - - -

1110 n 1 1 o I\CU Dlaaa J_> Rd <%Q 1ID^ .ZU 70 i\ 077 A77 A^ 1 .U J 1 A^ "3 1111 CI 111 Red J\vU Rra^s Dl u>5 CV o / .it \ 7 81 01 7 .Ul O 1 OU

A1 Q .Ul 7 .UZZ A77

1112 C1112 Gilding Metal A 93.38 6.30 .057 .070 .12 .100 - — -

1113 CI 113 nildine VJ 1 ! U 11 1 Metal lilv lul RMJ ....... 95.03 4.80 07fi 04^? 0£4 0^,7 1114 CI 114 Gilding Metal C 96.45 3.47 .012 01 7 077 .UZ 0711

1115 C1115 Commercial Bronze A . . . 87.96 11.73 .013 .13 .10 .074 — — —

1116 C1116 Commercial Bronze B ... 90.37 9.44 .042 .046 .044 .048 1117 C1117 Commercial Bronze C ... 93.01 6.87 .069 .014 .021 .020

1118 C1118 Aluminum Brass A 75.1 21.9 .025 .065 2.80 .010 .007 1119 C1119 Aluminum Brass B .77.1 20.5 .050 .030 2.14 .050 .040 1120 CI 120 Aluminum Brass C .80.1 18.1 .105 .015 1.46 .100 .090

1121 C1121 Beryllium Copper CA-1 72 . .97.49 (0.01) (.002) .085 .01 .012 0.07 1122 CI 122 Beryllium Copper CA-1 70 . .97.45 (.01) (.003) .16 (.01) (-01) .17 1123 C1123 Beryllium Copper CA-1 75 . .97.10 (.01) (.001) .04 (.01) (.01) .02

SRM Be Bi Cd Mn P Si Ag Te Co Cr 1101 C1101 0.00055 0.0004 0.0055 0.0055 0.0020 (0.005) 0.003 0.0015 1102 .00003 .0005 .0045 .0045 .0048 (.002) .0010 .0003

1103 C1103 .003 1104 CI 104 .005 1105 CI 105 .003

1106 C1106 .005 1107 C1107

1108 C1108 .025

1109 CI 109 .006 1110 CI 110

1111 Cllll

1112 C1112 .009 1113 C1113 .008 1114 CI 114 .009

1115 C1115 .005 1116 C1116 .008 1117 C1117 .002

1118 C1118 .13 .0021 1119 C1119 .070 .0015 1120 C1120 .018 .0011

1121 C1121 1.90 (.004) (.005) .11 (.005) 0.295 (0.002) 1122 C1122 1.75 (.004) (.004) .17 (.005) .220 (.002) 1123 C1123 0.46 (.002) (.002) .03 (.009) 2.35 (.002)

25
Lead-Base Alloys

SRM

31.4 mm D X

19 mm thick Type

Other Forms Cu

Chemcia

Ni

Composit

As

ion (Nomii

Sn

lal Weight

Sb

Percent)

Bi Ag Fe

1131 1132Solder Pb60-Sn40 . Bearing Metal . . . 127b

5 3e 0.011.054 0.012

.003

0.01 .057

39.3 5.840.43

10.2 0.06

.052

0.01 <0.001

Nickel-Base Alloys

SRM

31 mm D X

19 mm thick Type C Mn

Chem

P

cal Com

S

positioi

Si

l (Nomir

Cu

lal Wei£

Ni

ht Perc

Cr

ent)Mo Co Fe

1159

1160

Ni48, balance Fe

Ni80, Mo4, balance Fe . . . . 0.007.019 0.305.550 0.003

.003 0.003.001

0.32

.37 0.038

.021 48.2 80.3

0.06

.05 0.0104.35 0.022.054

51.0

14.3

Tin-Base Alloys

These tin metal SRM's have been prepared primarily for the tin-plate industry; they are useful for the calibration of optical emission spectroscopic equipment by the "point-to-point" technique.

SRM

6.4 mm D X

102 mm long Type Cu Ni

Che

Co

mical Com

As

Dosition (]

Pb

vlominal W

Sb

'eight Perce

Bi

nt)

Ag Zn Cd

431 432 433

434

435

Tin A . . Tin B . . TinC

Tin D . . Tin E . .

0.19 .097

.055 .019 .0077

0.0 38 .020 .0095 .0044

.0024

0.021

.011 .0045 .0020

.0011

0.16

.075 .047

.019 .0090

0.19

.094

.055 .022

.015

0.19

.095 .050

.019 .010

0.020

.0098 .0052

.0020

.0011

0.015

.0095 .0055

.0018 .0010

0.041

.020 .0095 .0046 .0020

0.020

.0095

.005 3 .0020

.0011

Titanium-Base Alloys

SRM Chemical Composition (Nominal Weight Percent)

31 mm D X

19 mm thick Type Mn Cr Fe Mo Al V

641 8Mn (A) 6.68 642 8Mn(B) 9.08 643 8Mn(C) 11.68 644 2Cr-2Fe-2Mo (A) 1.03 1.36 3.61 645 2Cr-2Fe-2Mo (B) 1.96 2.07 2.38

646 2Cr-2Fe-2Mo (C) 3.43 2.14 1.11 654a* 6A1-4V(B) (• o.l) (0.20) (0.20) K0.05) 6.3„ 3.9 5

*31 mm D X 6.4 mm thick.

26
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 calibrating 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 29. (Values in parentheses are not certified, but are given for information only.)

Chemical Composition (Nominal Weight Percent) SRM Type 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 4 1 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 41 A 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 0.031 0.0184 0.017 626 .048 .047 .042 627 .014 .0029 .021 628 .0091 .030 .009 629 .0017 .0075 .078

630 .0106 .0027 .022 631 .0015 (<-0005) <.002 (0.0023) (0.002) <0.001 «0.0005) (0.0002)

Zirconium-Base Alloys

SRM

31mm D X

9.5 mm thick Type C Cr Cu

Che mice

Fe

1 Compc

Mn

>sition (] Mo

Nomina]

Ni

Weight

N

Percent

Si

1

Ti W u

1212a Zirconium C 0.28 0.063 0.015 0.071 0.030 0.012 0.043 0.012 0.035 0.015 0.014 0.010

27
Gases in Metals

Certified for Nitrogen (Wt%)

Steels (Chip Form)

Type

Bessemer

Basic Open Hearth, 0.4C

Ni-Cr (SAE 3140)

W18-Cr4-Vl

Electric Furnace, 1.2C

Basic Electric Furnace, 0.3C . . Cr-Mo (SAE X4130)

Stainless (Crl 3) (SAE 420) . . .

Manganese (SAE Tl 340)

Stainless (Crl3-Mo0.3-S0.3) . . Cr-Ni-Mo (AISI 8640)

Co8-Mo9-W2-Cr4-V2 (Tool) . . Stainless (AISI 316)

Stainless (SAE 431)

Valve (Cr22-Ni4-Mn9)

Steel (Granular Form)

Nitrogen 0.015

.006 .009

.012

.011 .013

.009

.037

.004

.032

.008 .024

.039

.074

.441

SRM Type Nitrogen 163 Low alloy, Crl 0.007

Cast Irons (Chip Form)

SRM Type Nitrogen

5L 0.006

6g .006 7g Cast iron (high phosphorus) .004

Titanium Base (Chip Form)

SRM Type Nitrogen 173a 6A1-4V 0.018 174 4AF4Mn .012 176 5Al-2.5Sn .010

Zirconium Base Alloys (Chip Form)

SRM Type Nitrogen 360a Zircaloy-2 0.0043

Certified for Oxygen and Nitrogen (ppm)

The SRM's are issued as rods, 6.4 mm in diameter and 102 mm long. They are to be used in the determination

of 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 (1261-1625), see page 15. Values in parentheses are not certified; they are given for information only.

SRM Type Oxygen Nitrogen 1090 491 (60) 1091 Stainless steel (AISI 431) 131 (945) 1092 Vacuum-melted steel 28 (4) 1093 60 (4807) 1094 4.5 (71)

1095 AISI 4340 steel 9 (37) 1096 AISI 94B17 (Mod) steel 10.7 40.4 1097 Cr-V (Mod) steel 6.6 (41) 1098 High Carbon (Mod) steel 10 32 1099 Electrolytic iron 61 (13) 1089 Set of 5: 1095, 1096, 1097, 1098, and 1099 .

Certified for Hydrogen or Oxygen

SRM's intended for determination of hydrogen and oxygen in titanium-base alloys are available in sheet and rod

form. These were designed primarily for calibration of vacuum fusion or inert gas fusion equipment.

SRM Type Unit Size Wt/Unit

(grams)

Oxygen

(ppm)

Hydrogen

(Wt%)

352 Unalloyed titanium for hydrogen 1/4 in square X 0.05 in thick 21) 0.0032 353 Unalloyed titanium for hydrogen 1/4 in square X 0.05 in thick 20 .0098 354 Unalloyed titanium for hydrogen 1/4 in square X 0.05 in thick 20 .0215 355 Unalloyed Rod- 1/2 in D X 2 in long 3031

356 Alloy, 6A1-4V Rod-.425 in D X 1 3/4 in long 1332

28
High-Purity Metals

Very high-purity metal SRM's arc being made available to fill the needs of analysts determining impuri ty 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 in various materials by chemical, optical tmission,

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 instru- ment 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-puritv material and as a doped composition material. Zinc is available in a high-purity and in a less pure version. Both were prepared from the same starting material. The high-purity material is the result of further purification by vacuum distillation, zone refining, and degasification.

The zinc is supplied in the form of semi circular bar segments.

Type Unit Size

Chemical Compositions

(Nominal Parts Per Million by Weight)

Cu Ni Sn Pb

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 3 9mm long

0.1

.1

5.1 0.042

5.9

<l

0.5

(0.02)

(.02)

<1

12

11.1

SRM Ag Mg In Fe O Pd Au Rh Ir Cd Ti 685W* [0.1] 0.007 0.3 [2] 685 R* [•1] .007 .2 [<2]

680L1

680L2 .1 <1 .7 4 0.2 <1 <0.2 <0.01

681L1

2.0 12 681L2 5 7 6 9 9 11 682* (0.02) (0.1) (0.1) 683* 1.3 2.2 1.1 (0.2)

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

Electron Probe Microanaiytical 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 microanaiytical techniques.

Cartridge Brass

Cartridge Brass, SRM 478, consists of two specimens: A cuill-cast cube (6mm on edge) with a polished 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. Detail: of the homogeneity testing are in NBS Miscellaneous Publication 260-10. Extensive test of SRM 478 with electron probe

microanalyzers show that satisfactory analytical calibration can be performed using SRM 478.

29
Fe-Cr-Ni Alloy

The Fe-Cr-Ni alloy, SRM 479, 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 election probe microanalysis.

Tungsten—20% Molybdenum

The tungsten-20% molybdenum alloy, SRM 480, is a wafer (1 mm in diameter and 1 mm thick) with a core of

tungsten-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 highpurity gold and a high-purity silver wire and four wires with nominal chemical composition differences 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 goldsilver set. In both sets special precautions were taken to achieve homogeneity on a microscopic scale.

Iron-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 satisfactory for use as a homogeneous material for electron probe microanalysis.

SRM Type Au Cu

Chemic

Ag

al Com

W

josition

Mo

(Nomir

Si

tal Weight Percent

Fe

(by difference)

1

Cr Ni Zn

478 479 480

481

482

483

Fe-Cr-Ni Alloy

Tungsten-20 Mo Alloy .... AulOOA

Au80-Ag20B

Au60-Ag40C

Au40-Ag60D

Au20-Ag80E

AglOOF

AulOOA

Au80-Cu20B

Au60-Cu40C

Au40-Cu60D

Au20-Cu80E

CulOOF

Iron-3% Silicon

100.00

80.05

60.05 40.00

22.43

100.00

80.15 60.36

40.10

20.12

72.8 5

19.83 39.64 59.92

79.85 100.00

19.96

39.92 59.90

77.58 100.00

78.5 21.5

3.22

71.0

96.7-96.8

18.3 10.7 27.1,

30
Primary, Working, and Secondary Standard Chemicals

These SRM's are high-purity chemicals defined as primary, working, and secondary standards in accordance 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 commerically 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.

SRM Type Wt/Unit

(grams)

Certified Use Purity Stoichiometric 17a 40h

41a

83c 84h Acid Potassium Phthalate

—i6060

70

7560

Polarimetric Value Reductometric Value Reductometric Value Reductometric Value

Acidimetric Value

a 99.95 b

99.99

99.99

136c 350 723 944 949d

Potassium Dichromate

Benzoic Acid

Tris(hydroxymethyl)aminomethane

Plutonium Sulfate Tetrahydrate

60

3050

0.5 0.5

Oxidimetric Value

Acidimetric Value

Basimetric Value

Assay

Assay

99.98

99.98

99.97 100

99.99

950a

951 960

984

987

Uranium Oxide (U3 08

) 25 100.

26

11

Uranium Oxide Standard Value

Acidimetric and Boron Isotopic Value

Assay

Assay and Isotopic

Assay and Isotopic

99.94

100.00 99.975

99.90

99.98

988 9990.010 60Assay and Isotopic

Assay Standard for ^

a^

Um

Chloride

99.9 99.98 99.99

aSucrose-Moisture <0.01 percent, Reducing Substances <0.02 percent, Ash 0.001 percent. ^Dextrose-Moisture <0.02 percent, Ash <0.01 percent.

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 Microprobe Standards, page 29.

SRM Type

Wt/Unit

(grams) Elements

Certified 140b 2 C,H

141b 2 N,C,H

142 2 Methoxyl (CH3 0-) 143c 2 S,C,H,N (IN PREP)

147 2 P

148 Nicotinic acid 2 N,C,H

2141 2 N

2142 2 Br 2143 p-Fluorobenzoic Acid 2 F

2144 2 CI

31
Clinical Laboratory Standards

These SRM'sare in tended for use in the calibration of apparatus and checking methods of analysis 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 SRNTs 930b and 93 la, see Spectrophotometry Filters, page 55.)

Type Purity %

Wit ll T« , + Wt/Unit

Olio 71 la 2g 912 99.7 25g

913 99.7 10g

914 Creatinine 99.8 10g 915 99.9 20g

77.U lUU'flg 917 99.9 25g

918 99.9 30g

919 99.9 30g

920 99.8 50g

oiy/i 98.9 lg 922 Tris (hydroxymethyl) aminomethane 99.9 25g

923 Tris (hydroxymethyl) aminomethane HC1 99.7 35g

924 100.5 30g 925 VMA (4-hydroxy-3-niethoxymandelic acid) 99.4 lg

930b Glass Filters for Spectrophotometry Set of 3 931a Liquid Filters for Spectrophotometry 3 sets of 4 932 Quaitz Cuvette for Spectrophotometry

t

1 each 933 Clinical Laboratory Thermometers Set of 3 934 Clinical Laboratory Thermometer tt 1 each *SRM 915, Calcium Carbonate, was used to develop the first-referee method of analysis in clinical chemistry. This work is described in NBS Special Publication 260-36, A Referee Method for the Determination of Calcium in Serum. (See inside of back cover for ordering instructions.) flndividually calibrated at 0°C and either 25, 30, or 37°C.

If Individually calibrated at 0, 25, 30, and 37°C.

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 elements. (Values in parentheses are not certified, but are given for information only.)

Content in Mg/g (or where noted, wt %)

SRM Type Wt/Unit

(grams) As Bi B Br Cd Ca CI

1571 1577

Orchard Leaves

Liver, Bovine

7550

14

(0.055)

(0.1) 33 (10) 0.11

.27 2.09%

(123)

(700)

(2600)

SRM Co Cu Cr F Fe Pb Li Mn Hg Mo Ni 1571

15 77

(0.2)

(.18)

12 193

(2.3) (4) 300 270

45

0.34

(14) 0.62%

(605)

91

10.3 0.155.016 (3.2)

1.3

SRM N P K Rb Se Ag Na Sr S Tl U Zn

li 71 2.76% 0.2 L-T 1.47% 12 0.08 82 (37) (2300) 0.029 25 1577 10.6% 0.97% 18.3 1.1 (0.06) 0.243% (0.14) (0.05) (.0008) 130

32
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.

SRM TVne Vol/Unit

(liters at STP)

Nominal Concentrations

1604a 68 o„

1.5 ppm

1607 68 0,212 ppm

1609 Oxygen in Nitrogen 68 O,

2 > 20.95 mole percent

1665 Propane in Air 870 C3 H8 , 3 ppm

1666 Propane in Air 870 C3 H8 , 10 ppm

1667 870 C3 H8 , 50 ppm

1668 Propane in Air 870 C3 H8 , 100 ppm

1669 Propane in Air 870 C3 H8 , 500 ppm

1673 Carhon Dioxide* in Ni tropin 870 C02 , 1.0 mol%

1674 f^arhnn DioYiHp in "Mitroppn 870 C02 , 7.5 mol %

1675 Carbon Dioxide in Nitrogen 870 co2) 15.0 mol %

1677 Carbon Monoxide in Nitrogen 870 CO, 10 ppm

1678 Carbon Monoxide in Nitrogen 870 CO, 50 ppm

1679 Carbon Monoxide in Nitrogen 870 CO, 100 ppm

1680 Carbon Monoxide in Nitrogen 870 CO, 500 ppm

1681 870 CO, 1000 ppm

1683 870 NO, 50 ppm

1684 Nitric Oxide in Nitrogen 870 NO, 100 ppm

1685 Nitric Oxide in Nitrogen 870 NO, 250 ppm

1686 870 NO, 500 ppm

1687 Nitric Oxide in Nitrogen 870 NO, 1000 ppm

Analyzed Liquids

These SRM's are intended for use in the analysis of liquids for elements that, when liberated, could become

environmental pollutants.

SRM Type Element

Certified Nominal

Concentration Vol/Unit

(ml) 1621 Sulfur in Residual Fuel Oil S 1.05 % 101) 1622 Sulfur in Residual Fuel Oil S 2.14 % 100

1623 Sulfur in Residual Fuel Oil S 0.268 % 100 1624 Sulfur in Distilate Fuel Oil S .211% 100

1636 Lead in Reference Fuel Pb 12, 20, 28 and 773 Mg/g* 3 vials each 1637 Lead in Reference Fuel Pb 12, 20, and 28 jug/g* 4 vials each 1638 Pb 773 Mg/g* 12 vials

1641 Mercury in Water Hg 1.49 Mg/ml 120 1642 Mercury in Water Hg 1.18 ng/ml 950

*Equivalent grams per gallon are: 0.03, 0.05, 0.07, and 2.0 g/gal, respectively.

Analyzed Solids

These SRM's are intended for use in the analysis of materials for elements of interest in health or environmental

problems. (See also Clinical SRM's page 32.)

SRM Type

Element

Certified Content Wt/Unit

1579

1631 Pb

S

11.87 wt% 35

set (3)

33
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.

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 jug per cm per minute at 25 °C, for flow rates of 1

,

5, and 10 liters per minute.

-SRM Type Tube Length

(cm)

Permeation Rate

(iug per min)

Typical Concentrations (ppm)

Flow Rates (liters per minute)

1 5 10

1625

1626

1627

Sulfur Dioxide Permeation Tube

Sulfur Dioxide Permeation Tube

Sulfur Dioxide Permeation Tube

10

5

2

2.8

1.4 0.56

1.07 0.214 0.107

0.535 .107 .0535

.214 .0428 .0214

Nitrogen Dioxide

Nitrogen dioxide permeation device (SRM 1629) are calibrated at 25.0 °C only. The temperature coefficient 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 ng per minute at 25 °C. A tube with a rate of 1 .0 jug per minute, in an

air-flow of one liter per minute at 25 °C, will produce a concentration of 0.5 ppm of N02

-

Trace Elements in Fossil Fuels

These SRM's are intended for use in calibrating instruments and checking analytical techniques and procedures

employed in the determination of trace elements in fossil fuels and materials with similar matrices. [See also: Biological Standards, page 32; Trace Element Standards, page 40.]

SRM Type Wt/Unit

Chemical Composition (jug/g)

As Be Cd Cr Co Cu Fe 1632 Coal 75g 5.9 (1.5) 0.19 , 20.2 (6) 18 8700

1633 Coal Fly Ash 75g 61 (12) 1.45 131 (38) 128 1634 Fuel Oil (In Prep) 100 ml (*) (*) (*) (*)

SRM Pb Mn Hg Ni P K Rb Se Si Ag

1632 1633 1634

30

70

(*)

40

493

(*)

0.12

.14

(*)

1598

(*) (*) (1.72%) (112)

2.9 9.4

(*)

(3.2%) «0.1)

SRM Sr S Te Tl Th Ti U V Zn

1632 1633

16 34 (1380)

(*)

«0.1) 0.59

(4)

(*)

(3.0) 24

(*)

(800) 1.4 11.6

(*)

35 214

(*)

37 210

*Planned to be certified.

34
Forensic Standards

These SRM's are intended 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 57.)

SRM Type Certification Unit of Issue 1820 Glass, Borosilicate Refractive Index 2 slabs; one polished, one unpolished 1821 Ethanol Purity-99.99% 10 ml

Hydrocarbon Blends

Six standard hydrocarbon blends are available for calibration of mass spectrometers and gas chromatographic

procedures used in the analysis of gasolines, naphthas, and blending stocks. The even numbered SRM's, 592*, 594,

596, and 598*, are representative of typical virgin napthas and the odd numbered SRM's 593, 595, 597, and 599, are representative of typical catalytically cracked naphthas in the C7 and C8 paraffin and cycloparaffin series. Each SRM is supplied in a unit of ten sealed ampoules. Each ampoule contains 0.03 ml of the blend. Each

ampoule is intended to provide material for only one calibration analysis so that possible fractionation of components

will be avoided. For individual components present in the mixtures in the amount of 10% or less (by volume), the limits of error

in composition are not greater than ±0.01 percent and for components present in more than 10 percent, the limits of

error are not greater than ±0.10 percent.

SRM 592* 593 594 595 596 597 598* 599

Rlend No 1 2 3 4 5 6 7 8

Unit (Ampoules) 10 10 10 10 10 10 10 10 Hydrocarbon Volume Percent (Nominal)

45 17 _ _

23 25 _

16 30 -

4

6 20

5 8

1 39 12

19 25

16 23

8 8

3 3 4 9

5 5 6 9

6 57 32

9 14 4 3 14 30

16 21 20 1 1 18 1 25 19

11 14

7 20

5 4

9 6

1 ,trans-2-cis-4-Trimethylcyclopentane 5 13

Temporarily out of stock. 35
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 determination of metals in lubricating oil. This technique is used

extensively in the defense program, the transportation 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

Constitu

Element

ent Certified

(wt. percent) Wt/Umt

(grams)

Type

i m^ i 1U / ja A 1 Ai o.U / 3 Aluminum 2-ethylhexanoate

1051b Ba 28.7 5 Barium cyclohexanebutyrate 1063a B 2.4 5 Menthyl borate 1053a Cd 24.8 5 Cadmium cyclohexanebutyrate 1074a Ca 12.5 5 Calcium 2-ethylhexanoate

lU/oD Cr Q £ c Tris( 1 -phenyl-1 ,3-butanediono) chromium (III) 1055b Co 14.8 5 Cobalt cyclohexanebutyrate 1080a Cu 16.37 5 Bis (l-phenyl-l,3-butanediono) copper (II) 1079b Fe 10.45 5 Tris (l-phenyl-l,3-butanediono) iron (III) 1059b Pb 36.65 5 Lead cyclohexanebutyrate

1060a Li 4.1 5 Lithium cyclohexanebutyrate 1061c Mg 6.45 5 Magnesium cyclohexanebutyrate 1062a Mn 13.8 5 Manganous cyclohexanebutyrate 1064 Hg 36.2 5 Mercuric cyclohexanebutyrate

1065b Ni 13.89 5 Nickel cyclohexanebutyrate

1071a P 9.5 5 Triphenyl phosphate 1066a Si 14.14 5 Octaphenylcyclotetrasiloxane 1076 K 10.1 5 Potassium erucate 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

Fertilizer Standards

These SRM's are intended for use in the fertilizer industry as working standards for the determination of the

certified constituents.

Certified Composition

(Wt percent)

SRM Type

Wt/Unit

(g) N P K

193 90 13.85 38.66 194 Ammonium Dihydrogen Phosphate 90 12.15 29.92 200 Potassium Dihydrogen Phosphate 90 22.74 28.76

36
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 passing a 100-mesh or finer sieve.

Chemical Composition (Nominal Weight Percent)

SRM Type Wt/Unit

(grams)

CaF Fe Mn Li2 0 Si0 2 p,os P

Available Oxygen

25c Manganese 100 57.85 2.36 0.22 16.7 27e iron (Sibley) 100 66.58 3.65 0.042 79a Fluorspar 120 97.39 180 Fluorspar, high-grade .... 120 98.8

181 Lithium (Spodumene) .... 45 6.4 182 Lithium (Petalite) 45 4.3 183 Lithium (Lepidolite) .... 45 4.1

Chemical Composition (Nominal Weight Percent as the Oxide)

SRM Type Wt/Unit

(grams) A12 03 CaO p2 o5 Si0 2 Fe 2 03 F C02 Ti02 Na2 0 MgO

120b Phosphate Rock (Florida) .... 90 1.06 49.40 34.5 7 4.68 1.10 3.84 2.7') 0.15 <0.35 0.28

SRM K2 0 K2 0 MnO CdO

120b <0.12 0.090 0.28 0.002

Concentrations

SRM Type Wt/Unit

(grams)

Total Cu %

Re Mo Au Ag

330 Copper, millheads 100 0.84 (0.3) ppm

331 Copper, milltails 100 .091 (.05) ppm

332 Copper, concentrate 50 28.45 (10.2) ppm

333 Molybdenum, concentrate 35 1.038 0.087 % ( +

)

+ Nominal value 93% MoS2

Chemical Composition (Nomina! Weight Percent)

SRM Type Wt/Unit

(grams) Zn Pb Fe CaO MgO Cd

113a 329Zinc, concentrate

Zinc, concentrate

100 100

57.3 45. 52.80

6.0 6

2.08

12.94

1.1, 0.08

0.75

.16,

0.78

.14

SRM Cu Co Ni s SiO; In Ag Moisture 113a 0.31 (0.11) (0.07) 30.6 (1 .5H) 0.08 329 .13, (.009) (.0006) (31.7) (0.61) 0.019 2.4 •4 5

*Troy ounces per ton.

37
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. (Values in parentheses are not certified, but are given for information only.)

Chemical Composition

(Nominal Weight Percent as the Oxide)

SRM Type Wt/Unit

(grams)

Si02 A12 03 Fe2 03 Ti02 P2 05

633 Portland B (red) 15 21.9 3.7 4 4.2 0.24 0.24 634 Portland C (gold) 15 20.7 5.2 2.8 7 .30 .10 635 Portland D (blue) 15 18.5 6.2 2.6S .32 .17 636 Portland F (yellow) 15 23.2 3.1 1.6S .17 .09 637 Portland G (pink) ' 15 23.1 3.3 1.80 .21 .25 638 15 21.4 4.5 3.5 8 .25 .06 639 Portland J (clear) 15 21.6 4.3 2.42 .31 .08 1016 Portland 15 21.05 4.97 3.71 .34 .13

SRM CaO

(+SrO) SrO MgO so3 Mn2 03 Na2 0 K2 0 Li2 0 Rb2 0

Loss on

Ignition 633 64. s 0.31 1.04 2.1 8 0.04 0.6„ 0.16 5 0.7 5 634 62. 6 .12 3.4 2-la .28 .14 .43 1.6, 635 59. 8 .22 1.2, 7.0 .09 .07 .45 3.2 5 636 63. 5 .04 4.0 2.3 .12 .10 .57 1-1. 637 66. 0 .10 0.7 2 2.3 3 .06 .13 •24 5 1.6 8 638 62., .07 3.8 4 2.3 .05 .12 .59 0.9 5 639 65. 8 .15 1 2 2.4 .08 .6 5 .05 1.0 1016 65.26 .25 0.42 2.27 .04 .55 .04 (0.012) «0.001) 1.20

Minerals, Refractories, Carbides, and Glasses

These SRM's are supplied in the form of powders, usually 100 mesh or finer. 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. Minerals

Chemical Composition

(Nominal Weight Percent as the Oxide)

SRM Type Wt/Unit

(grams)

Si0 2 Fe 2 03 A12 0 3 Ti02 MnO CaO

lb Limestone, argillaceous 50 4.92 0.75 1.12 0.046 0.20 50.9 88a Limestone, dolomitic 50 1.20 .28 0.19 .02 .03 30.1 70a Feldspar, potash 40 67.1 .075 17.9 .01 0.11 99a Feldspar, soda 40 65.2 .065 20.5 .007 2.14 97a Clay, flint 60 43.7 .45 38.8 1.90 0.11

98a Clay, plastic 60 48.9 1.34 33.2 1.61 .31 81a Glass sand IN PREP

165a Glass sand (low iron) IN PREP

154b Titanium dioxide 90 99.74

SRM SrO MgO Cr 2 03 Na2 0 K2 0 Li2 0 Zr02 BaO Rb2 0 p2 o5 C02 Loss on

Ignition lb 0.14 0.36 0.04 0.25 0.08 40.4 41.1 88a .01 21.3 .01 .12 .01 46.6 46.7 70a 2.55 11.8 0.02 0.06 0.40 99a 0.02 6.2 5.2 .26 .02 0.26 97a .18 .15 0.03 0.037 0.50 0.11 0.063 .078 .36 13.32

98a .039 .42 .03 .082 1.04 .070 .042 .03 .11 12.44 81a 165a 154b

38
Refractories

Chemical Composition

(Nominal Weight Percent as the Oxide)

SRM Type Wt/Unit

(grams)

Si02 A1^0 3 Total as Fe 2 03 FeO Ti02

76a Burned Refractory (Al2 03 -40%) IN PREP

77a Burned Refractory ( Al^ 03 -60%) IN PREP

78a Burned Refractory (AL, O3 -70%) IN PREP

103a 60 4.6 29.96 12.43 0.22 198 Silica refractory 45 0.16 0.66 .02 199 Silica refractory 45 .48 .74 .06

SRM Zr02 MnO P2 Os Cr2 03 CaO MgO Li2 0 Na2 0 K2 0

Loss on

Ignition

76a 77a 78a 103a 0.01 0.11 0.01 32.06 0.69 18.54 198 <.01 .008 .022 2.71 0.07 0.001 0.012 0.017 0.21 199 .01 .007 .015 2.41 .13 .002 .015 .094 .17

Carbides

SRM Type

Wt/Unit

(grams)

Total Carbon

(Wt. %)

276 Tungsten Carbide 75 6.09

Glasses

Chemical Composition (Nominal Weight Percent)

SRM Type

Wt/Unit

(grams)

Si02 PbO A12 03 Fe 2 03 ZnO MnO Ti02 ZrO,

89 45 g 65.35 17.50 0.18 0.049 0.088 0.01 0.005

91 Opal 45 g 67.53 0.097 6.01 .081 0.08 .008 .019 .0095

92 45 g 93a Wafers 32 mm D X 6 mm 80.8 2.3 .029 .012 .03 620 3 platelets 35 X 35 X 3 mm 72.1 1.8 .04 .02 621 Soda-Lime, Container ..... IN PREP

SRM CaO BaO MgO K2 0 Na2 0 B2 03 P2 05 As2 O s As2 03 S0 3 CI F

Loss on

Ignition

89 0.21 1.40 0.03 8.40 5.70 0.23 0.36 0.03 0.03 0.05 0.32

91 10.48 .008 3.25 8.48 .022 .102 .091 .014 5.72 92 0.70 93a <0.02 <.01 0.01 4.0 12.6 620 7.1 3.7 .4 14.4 .06 .3 621

39
Trace Element Standards

The SRM's listed below were designed for trace chemical analysis, specifically for calibrating instruments and

checking analytical techniques and procedures used to determine trace elements in various inorganic matrices. In addition many SRM's certified for chemical composition have one or more constituents certified at or oelow the 100

/ig/g level. Some SRM's in the following categories may be of use in trace analytical work:

Steels (pages 10-21); High Purity Metals (page 29); Non ferrous alloys (pages 22-27); Environmental Standards

(pages 33-34); and Biological Standards (page 32).

CD1U O tvlVl Tvnp-M "a tri v Size Tltvt r\f Iccup

607 Trace Elements in Feldspar 5 gram

608 Trace Elements in Glass, Set Waters 3 mm thick Set: 2 each 614 and 616

609 Trace Elements in Glass, Set Wafers 1 mm thick Set: 2 each 615 and 617

610 Wafers 3 mm thick 6 Wafers

611 Trace Elements in Glass, 500 ppm Wafers 1 mm thick 6 Wafers 612 Trace Elements in Glass, 50 ppm Wafers 3 mm thick 6 Wafers 613 Trace Elements in Glass, 50 ppm Wafers 1 mm thick 6 Wafers 614 Trace Elements in Glass, 1 ppm Wafers 3 mm thick 6 Wafers 615 Trace Elements in Glass, 1 ppm Wafers 1 mm thick 6 Wafers

616 Trace Elements in Glass, 0.02 ppm Wafers 3 mm thick 6 Wafers 617 Trace Elements in Glass, 0.02 ppm Wafers 1 mm thick 6 Wafers 618 Trace Elements in Glass, Set Wafers 3 mm thick Set: 1 each 610, 612,614 and 616

619 Trace Elements in Glass, Set Wafers 1 mm thick Set: 1 each 611, 613, 615 and 617

NOTE: Glass-Nominal Composition: 72% Si0 2

, 12% CaO, 14% Na2 0, and 2% A12 0 3

.

40
Trace Element Standards (Nominal Concentrations)

PIpttipti t 607 610-611 612-613 614-615 616-617 (ppm) (ppm) (ppm) (ppm) (ppm) — — (1.06) (0.078) Barium ^41 ^ Boron f171 (jz; (ft 7fn ( U.ZU) Cadmium

Cerium (1Q\ (iy) — (398.5) (37.8) (0.99) -

Cobalt \jyyj) Ci 1 1

1 A A A \ (444 ) (37.7) 1.34 (0.65) Dysprosium .... (jo

;

Erbium ( J? ) Europium — - (36) (0.99) -

Gadolin ium

Gallium (I. J) (ft 7 T.\ Gold (ft <\\ (ft 1 Q \ (U.18) Indium (ft (U. T\} ID) (ft 7A1 — 458 51 13.5 (11) Lanthanum ri#u (ft a VU.U J't

J

Lead 47A jo18 .0^7/ 7 77 1 .o J Manganese 485 flQ fil (\(i .41; 411 u.oz Molybdenum (~*.f* 941 (ft (U. 7Q1

Neodymium — (36) -

Nickel 4S8 7 Jo18 .08 (U.i»D) Potassium (64"» 7Q£ y Rhenium (4Q dT\ (A(O.O67^/ ) (u.i /; (ft ftftA\ R ubifiiiim S71 QO 47 S 7 0111 .44 U.OJJ ft flQQS

Samarium . (39} V jy ) Scandium . . . (0 59^ (ft 0261

Silver (254) 22.0 0.42 Strontium 65.485 515.5 78.4 45.8 41.72

Thallium . . (61 8) 15.7 0.269 (0 0082^ _ (447) (44) (0.74) (0.025) Thorium 457.2 37.79 0.748 0.0252

(437) (50.1) (3.1) (2.5) Uranium 461.5 37.38 0.823 0.0721 Ytterbium (42) Zinc (433) (2.43)

In addition to the 35 elements listed above, the Glass SRM's contain the following 26 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.

Nuclear Materials

Special Nuclear Materials

These SRM's consist of four groups: Plutonium Assay Standards, Plutonium Isotopic Standards, Uranium Assay

Standards, and Uranium Isotopic Standards. These SRM's are available to AEC contractors, AEC 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 B31 1, Chemistry Building, National Bureau of Standards, Washington, D.C. 20234.

41
Plutonium Assay Standards

SRM Type Certified for Wt/Units

(grams)

Purity

(%)

944 Plutonium sulfate tetrahydrate Plutonium Content 0.5 47.50* 945 Plutonium metal, standard matrix Impurities 5 (99.9) 949d Plutonium Content 0.5f 99.99

*Stoichiometric f Nominal weight (Values in parentheses are not certified, but are given for information only.)

Plutonium Isotopic Standards

SRM Type

Wt/Units

(grams) 23 Spu

J

2 3 9 p u

\tom Percen

24 0pu

t 241pu

24 2pu 946

947 948

Plutonium Sulfate Tetrahydrate

Plutonium Sulfate Tetrahydrate

Plutonium Sulfate Tetrahydrate

0.25

.25

.25

0.247

.296

.011

83.128

75.696 91.574

12.069

18.288

7.914

3.991 4.540

0.468

0.565 1.180 0.0330

Uranium Assay Standards

SRM Type Certified For Wt/Unit

(grams)

Purity (%) 950a 960

Uranium Oxide

Uranium Metal Uranium Oxide

Uranium

2526

j

99.94 (U 3 08 ) 99.975 (U)

Uranium Isotopic Standards

Atom Percent SRM Uranium Oxide (U3 08

) Wt 2 34

JJ 23S U

23tTj 23! u

(grams) 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 Enriched 1.0 ,0125 2.038 .0165 97.933

U-030 Enriched 1.0 .0190 3.046 .0204 96.915 U-050 Enriched 1.0 .0279 5.010 .0480 94.915 U-100 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 Enriched 1.0 .7777 90.196 .3327 8.693 U-930 Enriched 1.0 1.0812 93.336 .2027 5.380 U-970 Enriched 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) 95 3 Neutron density monitor wire (Co in Al) 0.116

42
Fission Track Glass Standards

These SRM's, at four uranium concentration levels, will aid fission track laboratories in interlaboratory 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. One wafer was irradiated in the NBS Reactor pneumatic transfer facility RT-3, which has a cadmium ratio of 10.2 for gold and 65 for copper;

the other wafer was irradiated in RT4, which has a cadmium ratio of 87 for gold and 536 for copper.

SRM Total U concentration ppm (by weight)

2 3 S U atom percent

Irradiation time (sec.) 961 461.5 ± 1.1 0.2376 RT-3 8 RT-4 12 962 37.38 ± 0.08 0.2392 RT-3 8 RT-4 12 963 0.823 ± 0.002 0.2792 RT-3 80 RT-4 120 964 0.0721 ± 0.0013 0.616 RT-3 360 RT4 540

Isotopic Reference Standards

SRM's for isotopic ratio are natural-ratio materials, unless otherwise noted, and are furnished with a certificate of isotopic composition.

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.

A description of the methods used in the characterization of the normal and enriched boric acid, SRM's 951 and

952, is given in NBS Special Publication 260-17. (See inside of back cover for ordering instructions.)

SRM Isotopic Reference Standards Element Certified Wt/Unit

(grams) 951 Boric Acid Boron 1.0 952 Boric Acid, 95% Enriched 1

0

B Boron 100

975 Chlorine 0.25 976 Copper Metal Copper .25 977 Bromine .25

978 Silver .25 979 Chromium Nitrate Chromium .25 980 Magnesium Metal Magnesium .25 *981 Lead 1.0 *982 Lead Metal, Equal Atom (206/208) Lead 1.0

*983 Lead Metal, Radiogenic (92%-206) Lead 1.0 984 Rubidium Chloride, assay and isotopic Rubidium 0.25 987 Strontium Carbonate, assay and isotopic Strontium .25 988 Strontium 10 989 Rhenium, assay and isotopic Rhenium pkg. (50)

*Sold as a set only of three 981, 982, and 983.

43
STANDARDS OF CERTIFIED PHYSICAL PROPERTIES

Ion Activity Standards

These SRM's are intended for use in the preparation of solutions for the calibration of specification electrodes. This includes 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 instruments. 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.

SRM Type

Potassium Acid Phthalate Potassium dihydrogen phosphate"!

Disodium hydrogen phosphate f Borax

Potassium hydrogen tartrate

Potassium tetroxalate Sodium bicarbonate 1 Sodium carbonate

J Tris(hydroxymethyl)aminomethane 1 Tris(hydroxymethyl)aminomethane hydrochloride^

pH(S)

(at25°C)

Wt/TJnit (grams) 185e

1861c

18611c 187b

188

189

191 192 922

923

4.004 [6.S63\

\1A\5J

9.183

3.557

1.679

10.01

7.699

60

30

30

3060

653030

25

35

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 phosphate!

Disodium hydrogen phosphate J Sodium bicarbonate"! Sodium carbonate

J

7.43

10.74

30

30

30

30

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

O^rams) 2201 Sodium Chloride pNa, pCl 125 2202 Potassium Chloride .... pK, pCl 160 2203 Potassium Fluoride .... PF 1 25

44
Mechanical and Metrology Standards

These SRM's are intended to relate measurement units made in industrial, university, and government laboratories to the mechanical and metrological units related through a National Measurement System 1 to the base units of mass,

length, and time.

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. SRM's in the 1301 to 1320 series (sets 1351, 1361-64) are used to calibrate these gages. 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's 1312-1319

(as sets 1368-70) are 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. For sets 1351 to 1369, the specimens are mounted on one card. Set 1370 is mounted on two cards, but packed in one box.

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-backscaiter type and for calibrating x-ray fluorescence methods for the measure- ment of the weight per unit area of gold or tin coatings. For gold and tin sets, the specimens are mounted on separate

cards, but are packed in one box.

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 determined by weight and area measurements.

ASTM Methods of Measuring Coating Thickness

Instrumental methods of measuring coating thickness are set forth in the following ASTM Methods of Test: B499 Method of Measurement of Coating Thicknesses by the Magnetic Method: Nonmagnetic Coatings on

Magnetic Basis Metals. B529 Measurement of Coating Thicknesses by the Eddy-Current Test Method: Nonconductive Coatings on Nonmagnetic Basis Metals. B530 Measurement of Coating Thicknesses oy the Magnetic Method: Electrodeposited Nickel Coatings on

Magnetic and Nonmagnetic Substrates. B504 Measuring the Thickness of Metallic Coatings by the Coulometric Method.

B244 Measuring Thickness of Anodic Coatings on Aluminum with Eddy-Current Instruments. E376 Recommended Practice for Measuring Coating Thickness by Magnetic-Field or Eddy-Current (electromagnetic) Test Methods.

D1400 Measurement of Dry Film Thickness of Nonmetallic Coatings of Paint, Varnish, Lacquer, and Related

Products Applied on a Nonmagnetic Metal Base. D1186 Measurement of Dry Film Thickness of Nonmagnetic Organic Coatings Applied on a Magnetic Base.

"Concept of a National Measurement System," Science 158, 67-71 (1967).

45
Nonmagnetic Coatings on Steel, or Nickel on Nonmagnetic Substrate

Nonmagnetic Coating on Magnetic Substrate (Copper and Chromium on Steel)

Nominal Coating Thickness

(inch) (metric) / mil \ (mil) 1301 0.00010 2.54 jum 0.10

1 3D9 .00025 6.25 jum 1303 .00050 12 f~im •JU 1304 .00075 ±y fj.ni .75 1305 .0010 25 JUffl 1 ft 1306 .0015 38 jum 1 .5

1 307 .0020 5 1 jum

1 308 .0025 62 jum 1309 .0027 68 jum 1310 .0032 o i jum 3 0 1311 .0055 0.14 mm 5.5

1 31 } .0080 .zj mm o .U

1 O 1 J .010 .25 mm 1U.U inn

1 jln .015 .jo mm 1 jX)

1 31

J

.020 .31 mm ZU.U 1316 .025 .62 mm 25.0 1317 .03 .76 mm 30.0

1 1 1 o 1318 .04 1 .0 mm 40.0 1319 .06 1 .5 mm 60.0 1320 .08 2.0 mm 80.0 1351 Set of 2 1307 and 1311 1361 Set of 4 1302, 1303, 1305, and 1307

1362 Set of 4 1306, 1310, 1311, and 1312

1363 Set of 4 1313, 1314, 1315, and 1316

1364 Set of 4 1317, 1318, 1319, and 1320

1368 Set of 4 1312, 1313, 1314, and 1315 1369 Set of 4 1316, 1317, 1318, and 1319 1370 Set of 8 1312, 1313, 1314, 1315,

1316, 1317, 1318, and 1319

Magnetic Coating on Magnetic Substrate (Nickel on Steel)

Nominal Coating Thickness SRM

1331 1332

1333

1334

1335 1336

1337

1338

1339 1352

1353

1365 1366

(inch) 0.00012

.00035

.00055

.00075

.0010

.0013 .0016 .0020

.0025

Set of 2

Set of 2

Set of 4

Set of 4

1332 and 1334

1335 and 1339

1331, 1332, 1333, and 1334

1335, 1336, 1337, and 1338

(micrometer)

3.0 8.9 14

1925

3340

5162

(mil) 0.12

.35

.55

.75 1.0

1.3

1.6 2.0

2.5

46
Magnetic Coating on Non-Magnetic Substrate (Nickel and Chromium, on Brass)

Nominal Coating Thickness

(inch) (micrometer) (mil) 1341 0.00012 3.0 0.12 1342 .00035 8.9 .35 1343 .00065 16.5 .65 1344 .0010 25 1.0 1345 .0015 38 1.5 1346 .0020 51 2.0 1367 Set of 4: 1341, 1342, 1343, and 1344

Gold and Tin Coating Thickness Standards

Gold Coating on Glass Sealing Alloy - ASTM Designation Fl 5 ; Fe-53, Ni-29, and CO-17.

SRM

Nominal Coating Weight Nominal Coating Thickness

(mg/cm2

) (micrometers)

(microinches) 1371 1372

1373

1374

1.5 3.0 6.0 14.0

0.8

1.5 3.0

7.1

3060

120 280

1381 1382

1383

1398

Set of 2: 1371 and 1372

Set of 2: 1372 and 1373

Set of 2: 1373 and 1374

Set of 4: 1371, 1372, 1373, and 1374

Gold Coating on Nickel

Nominal Coating Weight Nominal Coating Thickness SRM

(mg/cm 2

) (micrometers)

(microinches) 1375 1376

1377 1378

1.5 3.0 6.0 17.0

0.8

1.5 3.0

8.9

3060

120 350 1384

1385 1386

1399

Set of 2: 1375 and 1376

Set of 2: 1376 and 1377

Set of 2: 1377 and 1378

Set of 4: 1375, 1376, 1377, and 1378

Gold Coating on Copper-Clad, Glass-Epoxy Laminate

Nominal Coating Weight Nominal Coating Thickness SRM

(mg/cm2

) (micrometers)

(microinches) 2301 1.5 0.8 30 2302 3.0 1.5 60 2303 6.0 3.0 120 2304 14.0 7.1 280

2305 Set of 2: 2301 and 2302

2306 Set of 2: 2302 and 2303

2307 Set of 2: 2303 and 2304 2308 Set of 4: 2301, 2302, 2303, and 2304

47
Gold Coating on Copper

SRM

Nominal Coating Weight Nominal Coating Thickness

(mg/cm 2

) (micrometers)

(microinches) 2311 2312

2313

2314

1.5 3.0 6.0 14.0

0.8

1.5 3.0

7.1

3060

120 280

2315 2316

2317 2318

Set of 2: 2311 and 2312

Set of 2: 2312 and 2313

Set of 2: 2313 and 2314

Set of 4: 2311, 2312, 2313, and 2314

Tin Coating on Steel

Nominal -Coating Weight Nominal Coating Thickness SRM

(mg/cmJ

) (micrometers)

(microinches) 2331 2332

2333

2334

2335 2336

1.1 2.0

3.0 5.0 12.0

14.0

1.5 2.8 4.0

7.0 16.5 19.0

60

110

160

275 650

750

2338 2339

2340

Set of 2: 2332 and 2335

Set of 4: 2331 , 2333, 2334, and 2336

Set of 6: 2331,2332,2333,2334,

2335, and 2336

Glass Standards

SRM Type

Lead-Silica Glass A

Borosilicate Glass B

Extra Dense Lead

Soda-lime silica glass-type 523/586

Lead-silica glass-type 617/366

Mixed alkali lead silicate glass, 1/4 in patties (6 pes.) Dense barium crown 620/603 glass, 1 3/8 in diam \ 5/8 in thick gobs (4 pes.) Alkaline earth alumina silicate glass, 1/4 in diam cane (16 pcs-6 in long). . .

Alkali-free aluminosilicate glass, 1/4 in diam cane (13 pcs-6 in long) Neutral (borosilicate) glass, 1/2 in diam cane (6pcs-6 in long)

Borosilicate glass, 4.2 cm X 4.2 cm X 12.5 cm bar

Unit of

Issue 708

709 710

711 712

713 714

715 716

717

625 g 275 g 500 g

2 lb 3 lb 0.5 lb

, .5 lb

.5 lb 200 g 250 g 500 e

Gbss Viscosity Standards

SRM's 710, 711, and 717 are furnished as rectangular-shaped bars, and are certified for viscosity between values of 102 and 1012 poises. They are furnished to check the performance of high-temperature viscosity equipment

(rotating cylinders) and low-temperature viscosity equipment (fiber elongation, beam-bending, parallel -plates, etc.)

Temperature (°C) at Viscosity (poises)

SRM 10 2 UV 10* 10 s 106 10 7 10 8 10" 10 10 10" 10 12

710 1434.3 1181.7 10i9.0 905.3 82 1 .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

48
G/ass Viscosity Fixpoints

Softening Annealing Strain SRM Type of Glass Point Point Point °C °C °C

Extra Dense Lead 384 328 311

7 1 n Soda Lime-Silica 724 546 504

71 1 602 432 392

71 7 528 386 352 713 Dense Barium Crown 738 631 599 714 Alkaline Earth Alumina Silicate 908 710 662

715 Alkali-Free Aluminosilicate 961 764 714

716 Neutral 794 574 530

717 Borosilicate 720 516 471

Relative Stress Optical Coefficient

Three glasses have been certified for relative stress optical coefficient. These glasses will be used to check cali- brations 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 X = 546.1 nm

708 Lead -Silica Glass A C= 2.857 Brewsters, 10-,2 m2 /N

Borosilicate Glass B C= 3 .65 2 Brewsters, 1

_I

m2 /N

709 Extra Dense Lead C=-1.359 Brewsters, 10-' 2 m2 /N

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 12.7 X 1.27 X 0.32 cm

Density Standards

SRM 217b (all sizes) is certified for density (air saturated at 1 atm) at 20, 25, and 30 °C; and may be used to

calibrate pycnometers and density balances. SRM 217b-8S is contained in a special ampoule with an internal breakoff tip, the others are sealed "in vacuum" in plain glass ampoules. [See also, Refractive Index, page 57; and

Solution Calorimetric Standards, page 52.]

SRM's 1815 and 1816 are certified for density as determined by ASTM Method D 1217, Test for Density and

Specific Gravity of Liquids by Bingham Pycnometers. [See also, Refractive Index, page 57; and Reference Fuels, page 62.]

SRM Type

Density 20 °C

(g/ml) Amount, ml

217b-5 2,2,4-Trimethylpentane 0.6918 5 217b-8S 2,2,4-Trimethylpentane .6918 8 217b-25 2,2,4-Trimethylpentane .6918 25 1815 .6838 1000

1816 Isooctane (2,2,4-Trimethylpentane) . . . .6919 1000

49
Polymer Standards

Four Polymer SRM's are available: Two polystyrenes, one with a narrow molecular weight distribution (SRM

705), the other with a broad distribution (SRM 706), and two polyethylenes, linear (SRM 1475) and branched

(SRM 1476).

These materials are certified for the properties indicated in the table, such as weight and number average 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.

The certificate for 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.

SRM Type

Wt/Unit

(grams) 705 Polystyrene, narrow molecular weight distribution, Mw « 179,000, Mw/M n « 1.07 Polystyrene, broad molecular weight distribution, Mw « 258,000, Mw/Mn « 2.1 1475 Polyethylene, linear, Mw * 52,000, Mw/Mn

= 2.9 1476 Polyethylene, branched

1850

50

The following table lists the properties (and method) certified for these SRM's.

Property (and method) 705 706 1475 1476

Molecular Weight

Weight Average (Light Scattering) X X X

(Sedimentation Equilibrium) X X

(Gel Permeation Chromatography-GPC) X

Number Average (Osmometry) X

(GPC) X

Molecular Weight Distribution . . . (GPC) X

Limiting Viscosity Number (Capillary Viscometer) Benzene 25 °C X X

Benzene 35 °C X

Cyclohexane 35 °C X X

1-Chloronaphthalene 130 °C .... X X

1,2,4-trichlorobenzene 130 °C . . . X X

Decahydronapthalene 1 30 °C . . . . X X

Melt Flow (ASTM) X X

Density (ASTM) X X

50
Heat Standards

These SRM's are intended to relate heat and temperature measurements made in industrial, university, and gov- ernment laboratories with the International Practical Temperature Scale-1968. 1 [See also, Reference Fuels, page ]

Superconductive Thermometric Fixed Point Devices

The SRM is a device composed of small cylinders of high purity lead, indium, aluminum, zinc, and cadmium

mounted in a threaded copper stud and enclosed by a mutual inductance coil set. It provides convenient temperature calibrations in the range 0.5-7 K with precision of ± 0.001 K. It should prove particularly valuable to users of 3 He4 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 Element Nominal Temperature

(K) 767 Superconductive Thermometric Fixed Point Device Lead 7.2 Indium 3.4 Aluminum 1.2 Zinc 0.8 Cadmium .5

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. 1

SRM Type

Temperature

- °C

Wt/Unit

(grams) 740

741

Zinc Tin 419.58

231.9681 350

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 Tin 231.967 350 43h 419.58* 350

44f 660.3 200 45d Copper 1084.8 450

49e Lead 327.493 600

*SRM 43h is less pure than SRM 740 and has a freezing point 0.001 °C

lower.

Melting Point Standard

This SRM is calcined alpha alumina the purity of which (99.9+ percent) makes it a suitable pyrometric standard

for melting point on the International Practical Temperature Scale of 1968.

SRM Type

Temperature °CWt/Unit

(grams) 742 2053 10

'"International Practical Temperature Scale of 1968," Metrologia, 5 3544 (1969).

51
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 historically calorie by the equation: 4.184 joule = 1 calorie.

Combustion Calorimetric Standards

These SRM's are issued primarily to check the performance of calorimetric methods for the determination of

the heat of combustion. SRM 217b-8S is contained in a special ampoule with an internal break-off tip, the others

are sealed "in vacuum" in plain glass ampoules.

SRM Type

Unit Amount

39i Benzoic acid, 26.434 absolute kilojoules/gram .... 30 g 217b-5 2 ,2 ,4-Trimethylpentane ,47.713

absolute kilojoules/gram 5 ml

217b-8S 2,2 ,4-Trimethylpentane 8 ml

217b-25 2,2 ,4-Trimethylpentane 25 ml

Solution Calorimetric Standards

These SRM's are issued primarily to check the performance of calorimetric methods used for the determination

of heats of solution and heats of reactions in solution.

SRM Type

Wt/Unit

(grams) 724a

1654

tris(hydroxymethyl)aminomethane

a-Quartz for HF acid solution calorimetry 5025

Heat Source Calorimetric Standards

SRM Type

Wt/Unit

(grams) 1651 Zirconium-barium chromate heat source powder (ca 350 cal/g) 50

1652 Zirconium-barium chromate heat source powder (ca 390 cal/g) 50 1653 Zirconium-barium chromate heat source powder (ca 425 cal/g) 50

Enthalpy and Heat Capacity Standards

This SRM has been certified for enthalpy and heat capacity of 99.95+ percent a-alumina over a temperature

range from 273.15 to 2250 K.

SRM Type

Wt/Unit

(grams) 720 Sapphire, synthetic (A1 2 03

) 15 g

52
Differential Thermal Analysis Standards

SRM's 758, 759, and 760 have been issued by NBS in cooperation with the International Confederation of

Thermal Analysis as Standards for calibrating differential thermal analysis and related thermo-analytical equipment

under operating conditions. SRM's 758, 759, and 760 comprise a total of eight inorganic substances and two metals.

SRM Type

Temperature/Range

(°C)

Tjnit of Issue

758 DTA Temperature Standard 125435 Set of 5 (See below) 759 DTA Temperature Standard 295-675 Set of 5 (S?e below) 760 DTA Temperature Standard 570-940 .Set of 5 (See beiow)

758 759 760 Peak Temp.

(125435 °C) (295-675 °C) (570-940 °C) °C Wt(g)

KN03 135 10

In (Metal) 159 3 Sn (Metal) 237 3 KC104 KC104 309 10 Ag2 S04 Ag2 S04 433 3 Si02 Si02 574 3 K2 S04 K2 S04 588 10 K2 Cr04 K2 Cr04 673 10 BaC03 819 10 SrC0 3 938 10

Vapor Pressure Standards

These SRM's are intended for use in the testing and calibration of vapor pressure measurement apparatus and

techniques. The materials ultimately will include gold, cadmium, platinum, silver, and tungsten, and will cover a temperature range of 600 to 3,000 K.

SRM Type

Pressure Range

(atmosphere)

Temperature Range

(K) Unit Size

745 Gold 10"3 to 10"8 1300-2100 Wire 1.44 mm X 152 mm

746 Cadmium .... 10"4 to 10"11 350- 594 Rod 6.4 mm X 64 mm

747 Platinum IN PREP

748 SUver 10"3 to 10"12 800-1600 Rod 6.4 mm X 64 mm

749 Tungsten IN PREP

Thermal Conductivity 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)

734-S Electrolytic Iron . . 6-280 6.4 305

734-L1 Electrolytic Iron . . 6-280 31.8 152 734-L2 Electrolytic Iron . . 6-280 31.8 305

735-S 5-280 6.5 300 735-M1 5-280 12.5 150 735-M2 5-280 12.5 300

735-L1 5-280 35 50 735-L2 5-280 35 100

53
Thermal Expansion Standards

These SRM's cover the temperature range from 20 to 1900 K having coefficients of thermal expansion over the range of 0.5 to 25 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-L1 Sapphire IN PREP

732-L2 Sapphire IN PREP

732-L3 Sapphire IN PREP

736-L1 Copper 20-800 6.4 51 736-L2 Copper 20-800 6.4 102

736-L3 Copper 20-800 6.4 152

737-L1 IN PREP

737-L2 Tungsten IN PREP

737-L3 Tungsten IN PREP

739-L1 Fused Silica 80-1000 6.4 51 739-L2 Fused Silica 80-1000 6.4 102 739-L3 Fused Silica 80-1000 6.4 152

Thermocouple Materials

This SRM is intended to serve as a convenient mechanism for the comparison of manufactured wire to standard

reference thermocouple tables.

SRM Type Form

733 Silver-28 Atomic Percent Gold Wire: 32AWG(0.2019 mm) diameter 3 meters long

Magnetic Standards

Magnetic Susceptibility. Standards

These SRM's are intended for use in the calibration of instruments used to measure magnetic susceptibility. The

susceptibility values shown are nominal for 297 K.

SRM Type

Gram

Susceptibility x,cm

3

• g"1

Volume

Susceptibility k Form/Unit

763-1 763-2

763-3

Aluminum*

Aluminum

0.605 X 10"6 1.63 X 10"6 Cylinder Wire Rod

3 mm diameter X 3 mm

0.5 mm diameter X 250 mm

6 mm diameter X 175 mm

764-1 764-2 Platinum

Platinum 0.990 X 10"6 21.2 X 10"6 Cylinder Wire

3 mm diameter X 3 mm

0.5 mm diameter X 50 mm

765-1 765-2

765-3

Palladium

Palladium

Palladium

5.25 X 10"6 63.1 X 10"6 Cylinder Wire Sponge

3 mm diameter X 3 mm

0.5 mm diameter X 50 mm

1 gram

766-1 Manganese Fluoride 123.5 X 10"6 484 X 10"6 Cube 3x3x3 mm

*At 77.7K, Gram Susceptibility for SRM 763: x

= 0.695 X 10"6 cm3• g" 1

.

54
Optical Standards

Spectrophotometric Standards

Color Standards for SpectrophotometerTristimulus Integrator Systems

This SRM is a set of 5 transparent colored glass filters to check the performance of spectrophotometer-tristimulus

integrator systems, the automatic recording and computing devices used in routine color measurements. Each glass

filter is 2-inches (5 cm) square (approximately 3.0 mm thick) with polished faces. A chart of tristimulus values for CIE sources A, B, and C, representing incandescent-lamp light, noon sunlight, and average daylight; and a detailed report on the changes in tristimulus values caused by errors in the 100-percent and zero adjustments of the photometric scale, wavelength errors, slit-width errors, errors due to stray energy, and inertia errors of the recording

mechanisms are furnished with each set of glasses. Through the use of these filters the user of a spectrophotometerintegrator combination will be able to determine when the instrument goes out of adjustment. From the pattern of

the discrepancies between measured and reported tristimulus values, he will also be able to obtain some clue as to

the type of maladjustment.

This SRM is available only as a set of five filters.

SRM Type Unit Size 2101 Supplied only as a 2102 Signal yellow glass set-one each of 2103 5 filters 2104

2105 Selective neutral glass

Filters for Spectrophotometry

These SRM's are intended primarily for use in checking the accuracy of the photometric scale of spectropho- tometers and to provide a means of interlaboratory comparisons of spectrophotometric data.

Glass Filters, SRM 930b, 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 absorbance and transmittance

at wavelengths of 440, 465, 564.1, and 635 nanometers. The 546.1 mm wavelength coincides with the Mercury

emission line.

Liquid Filters, SRM 931a, are absorbance standards for use in ultraviolet and visible spectrophotometry. This

SRM consists 3 sets of 4 vials, each containing a blank solution and three solutions of different concentrations of

an absorbing liquid. Each vial contains approximately 10 ml of solution. The net absorbances are certified for each concentration wavelengths 302, 395, 512, and 678 nanometers.

Quartz Cuvette, SRM 932, is an all-quartz rectangular parallel-piped 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 10.05 mm, and the inner

surfaces of the opposite windows are parallel within ± 0.002 mm. Each cuvette is certified for pathlength and

parallelism of the windows to within ± 0.0005 mm.

SRM Type Unit 930b Glass Filters for Spectrophotometry .... Set: 3 filters, 4 holders 931a Liquid Filters for Spectrophotometry .... Set: 12 vials 932 Quartz Cuvette for Spectrophotometry . . . 1 each

55
Thermal Emittance Standards

SRM's of normal spectral emittance are available in three materials, platinum-13 percent rhodium alloy having

low emittance, sandblasted and oxidized Kanthal (an iron-chromium-aluminum alloy) having intermediate emittance,

and sandblasted and oxidized Inconel (a nickel-chromium-iron alloy) having high emittance. SRM's of all three materials have been calibrated for normal spectral emittance at 800 and 1 100 K; the Kanthal and Inconel standards

at 1300 K and the platinum-13 percent rhodium at 1400 and 1600 K. Normal spectral emittance data is supplied

at 156 wavelengths in the one to fifteen micron range for all the combinations listed above. In addition, data for the platinum-13 percent rhodium SRM's is supplied in the fifteen to thirty-five micron range at 1100 K. SRM Type Unit Size 1402 Emittance standards 1/2 in disks Pt-13% Rh

1403 Emittance standards 7/8 in disks Pt-13% Rh

1404 Emittance standards 1 in disks Pt-13% Rh

1405 1 1/8 in disks Pt-13% Rh

1406 Emittance standards • 1 1/4 in disks Pt-13% Rh

1407 Emittance standards 2 in X 2 in squares Pt-13% Rh

1408 Emittance standards 1 in X 10 in strips Pt-13% Rh

1409 Emittance standards 3/4 in X 10 in strips Pt-13% Rh

1420 Emittance standards 1/2 in disKs Kanthal 1421 Emittance standards 7/8 in disks Kanthal 1422 1 in disks Kanthal 1423 Emittance standards 1 1/8 in disks Kanthal 1424 Emittance standards 1 1/4 in disks Kanthal 1425 Emittance standards 2 in X 2 in squares Kanthal 1427 Emittance standards 3/4 in X 10 in strips Kanthal 1428 Emittance standards 1/4 in X 8 in strips Kanthal 1440 Emittance standards 1/2 in disks Inconel 1441 7/8 in disKs Inconel 1442 Emittance standards 1 in disks Inconel 1443 Emittance standards 1 1/8 in disks Inconel 1444 Emittance standards 1 i/4 in disks Inconel 1445 Emittance standards 2 in X 2 in squares Inconel

Reflectance Standards

These SRM's are intended primarily for calibration of (1) re Hectometers used in the evaluation of the appearance

properties of polished metals and metal plated objects, and (2) rcflectometers and other equipment used in the evaluation of thermal radiation properties of materials. These properties are of particular importance in the automotive

and aerospace industries, although they also have many other applications.

The SRM's are mirrors produced by vacuum deposition of gold on glass and aluminum on glass, and are calibrated

for near-normal (9°) specular reflectance. They are certified in terms of absolute reflectance over the wavelengih

range from 0.25 to 30 micrometers.

Specular Spectral Reflectance Standards

SRM Type

Blank Size Coated Area Size (cm) (cm) 2005 Gold on Glass 7.6 X 10.2 X 1.9 5.1 X 7.6 2006 Gold on Glass 3.8 X 3.8 X 1.3 2.5 X 2.5 2007 Gold on Glass Disk 2.9 dia. X 1.0 entire surface 2008 Gold on Giass Disk 2.4 dia. X 0.6 en lire surface

56
Refractive Index Standards

SRM 217b is certified for refractive index at 20, 25 and 30 °C, from 435.8 to 667.8 nm for seven wavelengths,

and is available in three sizes 5, 8, and 25 ml ampoules. SRM 217b-8S is a special ampoule with an internal breakoff tip, the others are vacuum-sealed in plain glass ampoules. SRM 217b is also certified for Density (p. 49), and

Combustion Calorimetry (p. 52).

SRM 1815 and SRM 1816 are certified for refractive index for the sodium doublet (Dt , D2 ) only at 20 °C. They are also certified for Density (p. 49), and several other properties (see Reference Fuels, p. 62). SRM's 1815

and 1816 are issued in 1 liter units. SRM 1820 is certified for refractive index at thirteen wavelengths from 404.7 nm to 706.5 nm. This SRM is designed for both calibrating refractometers and certifying refractive index immersion liquids, and should provide

a basis for accurate measurements of refractive index and dispersion. SRM 1820 consists 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 Type n D

217b

1815 1816

1820

2,2,4-Trimethylpentane 1.39147

1.38776 1.39148

1.48755

57
Radioactivity Standards

Information concerning the SRM appears on it or its container. A Certificate containing pertinent information 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 (except the carbon-14 contemporary dating standard) are shipped

only by express or air freight (shipping charges collect). The prices of SRM's may change as current stocks are de- pleted and are replaced. Purchasers will be billed at the prices in effect at the time of shipment.

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 per- cent 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 uses the abbreviation ntps for nuclear transformation

per second. In this list both ntps and dps are used; the latter when dps has been used in certificates printed before 1968. The terms: aps, |3"ps, /Tps, K-x-rays ps, 7ps 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 ex- pressed interest are notified of their availability. A representative list of such 'radionuclides is given on page If you need any of these radionuclides or others 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 Test Services of the National Bureau of Standards," NBS Special Publication 250. Requests for these tests should be submitted,

with full source information for approval of suitability, to the Radioactivity Section.

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 Approximate Activity at Time of

Calibration (Month, Year)

Accuracy

(%) *4906 Plutonium-238 1.4 X 10 3 to 3.4 X 10" ntps (4/69) ±0.8 4904-D Americium-24 1 2 X 10 3 to 5 X 10 4 ntps (2/70) 1.0 4907 Gadolinium-148 .... 50 to 2 X 104 ntps (1/73) 1.7

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.

SRM Radionuclide Approximate Activity at Time of

Calibration (Month/Year)

Uncertainty

(%) 4935-C

*4235

Krypton-85

Krypton-85

5 X 10 7 ntps/mole (3/74)

1 X 10 7 ntps/source (11/74)

1.0

1.0

58
Alpha-Particle, Beta-Particle, Gamma-Ray, and Electron-Capture Solution Standards

'hese standard reference materials are contained in flame-sealed ampoules.

Approximate Activity Approx.

Radionuclide

or Emission Rate per gram of Weight Accuracy

Solution at Time of Calibration (Month, Year) of Solution (gram)

(%)

4229 Aluminum-'? f\ 39 ntps (11/71) A. & i i i . i 4219 Cadium-109 1 A 1 u TPS *4233 Cesium-1 37 JS VA 101U 14

alKJ ntnmclilb (M/ll\ \ 1 Z. f

/ Z.

)

O .1 yj.j 4925 Oaroon-I 4 (benzoic aciH in tnlnpnp^ l. A l\J Upo \f / JO)

Ha4 Y 11UO4 Hnc upSvO/0/J (&lfyl\ J 1 A 4222 r'arhnn-l 4 fn-hpyaHpranp^ 1J J . 1 4223 farbon-l 4 ^n-hfixpfipratif1 ^ A lu UpS VO/O / J 4 X 10 2 dps (6/67) 4 X 10 5 dps (5/74)

-2J 1 1 4224 (~, prhnn-14 ^n-hpYaHppanp^ 1J 1 1 4245 Carbon-14 (sodium carbonate) t; 1 0 4246 Oirbon-1 4 f snHinm carbonated 4 V 1 0 4 ^ A 1U ntnc IllpS <<n/741 \Jj t^J <; j nu.yq 4247 farhr\n-1 4 fcr^Hiiim rcirlir\nQtp^ h a iu nips (d 1 1

)

co

i i 1 .1 4943 Phlorine-^fi I A lu p pS ViyOZJ -1J 7 1 494 1 -D Pnhalt-S7 o a iu nips [j/ id) cJ

1 Q r .o 4Q?n 47ZD y a i u aps (y/o i ) y X iu aps (y/o 1

)

j X IU aps (i/o4)

Zj i .y 4Q77 i

1 Q i .y 4QA7 AH

1 r\ 1 .0 *AQAQ ly^y \r\A'\r\c± 1 7Q 0.2 MCl (ly 1 i) 1 .1 1 .7 4929-C Iron-55 2 X 10" K-x-ray ps (4/70) 3.9 2.7 *4226 Nickel-63 2 X 10 6 ntps (5/68) 4.1 1.0 4940-B Promethium-147 5 X 104 dps (11/67) 3 1.9 4228-B Selenium-75 1 X 106 ntps (4/74) 5 2.9 4232 Silver-llOm 1.7 X 10 s ntps (8/74) 5 0.7 4921-C Sodium-22 1 X 104

|3 +ps (8/64) 2.8 1.4 4922-E Sodium-22 2 X 10 s 0

+ps (3/67) 5.1 1.4

SRM

Contemporary Standard for Carbon-14 Dating Laboratories

Description 4990-B Oxalic acid; no specific activity is given. (One pound of oxalic acid taken from specially prepared

material for use as a common contemporary standard against which world-wide measurements can be compared.)

NOTE: These SRM's are shipped parcel post, prepaid to domestic and overseas purchasers.

Environmental Standards

SRM Radionuclide(s)

Approximate Gamma

Ray Emission Activity

(Month/Year)

Form Unit Uncertainty

(%)

4215-B Mixed Radionuclides 1 X 10 5 7ps (7/74) Point Source +

1 4216-B Mixed Radionuclides 4X10" tps (7/74) Point Source +

1 *4332 Americium-243 135 ntps/g (9/74) Solution 2g 1.4 *4333 Americium-243 3 ntps/g (9/74) Solution 5g 1.5 *4330 Plutonium-239 : 50 ntps/g (1974) Solution 2g < 3%

4331 Plutonium-239 5 ntps/g (1974) Solution 2g < 3%

'These SRM's contain: cadmium-109, cobalt-57, cerium-139, mercury-203, tin-1 13-indium-l 13m, strontium-85,

cesium-1 37-barium-l 37m, yttrium-88, and cobalt-60. They are prepared by depositing the radioactive material on

polyester tape and covering it with a layer of the same tape, mounted on an aluminum ring.

Low Energy Photon Sources*

SRM Type

Approximate Emission Rate

1 Per Steradian at Time of (Month/Year)

Uncertainty

(%)

4260 200400 K-X-Rays (3/74) 3.0

*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. 59
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 procedure are americium,

krypton, and thorium SRM's. The americium-241 SRM's, 421 1 and 4213, are prepared 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 aluminum foil between two glass disks, with an epoxy adhesive. The thorium-228 SRM's, 4205 and 4206, are 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.

SRM Gamma-Ray Energy

A ntirnY im a tp A ntivit v ( ntr>c

dl illllC Ul V all! M a I \KH 1 Uncertainty

(mev)

^IVlUll 111/ I Cal ) (%)

*4211 Americium-24

0.060 4 to 18 X 104 f2/701 2.8 *4213 Americium-241 0.060 2 to 4 X 10 s (2/70) 2.8 4202-B Cadmium-109 0.088 1 to 2 X 10 s (5/74) 1.9 1 4214 Cobalt-57 0.122,0.136 1 X 104 to 1 X 10 s (3/73) 9 X 104 to 2 X 10 s (11/73)

1.7 4999-E Cerium-139 0.166 2.2 *4212 Krypton-85 0.514 7 X 10 6 to4x 10 7 (5/71) 2.6 4200-B Cesium-137 0.662 7 X 104 (12/68) 1.3 *4207 Cesium-137 0.662 5 X 10 s (12/68) 4 to 6 X 10 3 (4/70)

1.3 4201-B Niobium-94 0.702,0.871 1.5 4240 Bismuth-207 0.5696, 1.0634, 1.7697 5 X 104 to 1 X 10 s (1/73) 1.4 4203-C Cobalt -60 1.173, 1.332 1 to 2 X 10 s (2/73) 1.2 4210 Cobalt-60 1.173, 1.332 2 X 106 (4/69)

1 to 2.5 X 104 (8/74)

1.1 4217 Silver-llOm 1.0 499 1-C Sodium-22 1.2745 6 X 104 (4/69) 1.5 4996-B Sodium-22 1.2745 3 X 10 3 (4/69) 1.5 4209-B Yttrium-88 0.898, 1.836 2 to 5 X 10 s (10/73) 1.8

Uncertainty in X-ray emission rate (uncertainty in activity is 3.9%).

Radium Gamma-Ray Solution Standards

These samples are contained in flame-sealed glass ampoules.

SRM Radium Content

(in micrograms)

Accuracy

(%) 4955 0.1 ±3.6 4956 0.2 4.4 4957 0.5 1.8 4958 1.0 1.8 4959 2.0 1.3 4960 5.0 1.3 4961 10 1.1 4962 20 1.1 4963 50 1.1 4964 -B 102 0.5

Radium Solution Standards for Radon Analysis

These samples are contained in flame-sealed glass ampoules.

SRM

Approximate Radium Content

(gram)

Approx. Wt. Soln. (grams)

Accuracy

(%) 4951 lO"11 100 ±1.0 4950-B lO"9 20 1.0 4953 10"8 20 1.0 4952-B Blank Solution (In Preparation)

60
Radioactivity Standard Reference Materials Currently Not in Stock

Radionuclide Forms

Americium-241 Solution,

Low energy photon source ....

Argon-37

Argon -3 9 Barium-140 Solution Cadmium-109 Solid, Low energy photon source ....

Calcium-45 Cenum-141 Solution

Ceriurn-144 Chromium-51 Point Source, Solution

i n

o

(jola-lye

lOQine-1 25

Iodine-131 Solution

lron-59 Solution Manganese-54

Mercury-197

Mercury-203 Point Source, Solution Molybdenum-99 Solution

Status Radionuclide Niobium-"5

A

t\ Phosphorus-32 R rlu 1011111111-/4 Z P Polonium-2 1

0

P Potassium-4 2 Scandium-46 p oocnum-z^r r

1 f oironiiuni-oj f f

A F ^trr\ntiiim oiron Liuin-o7 RQ

P F Qtrr»n i3 1 1 UJ 1 tiiiTn-QO 1 1 ui 1 1 yyj P F oUH UT-j J

i antaium-i oz

r inauiuiTi-zu4 C,F Thorium-228

C,F Thorium-229

C,F Tin-1 1

3

C,F Xenon-133 E Zinc -6 5

Forms

Point Source, Solution . . . Solution Solution

Plated Source

Solution

Solution

Solution

Point Source, Solution,

Low energy photon source

Solution

Solution

Solution

Solution Solution

Point Source

Solution

Solution Gas

Point Source, Solution . . .

Status

C, F

C, F A

D

C, F

C, F

C, F

A, F E

C, F

C, F

C, F

F

1AA

C, F

B

C, F

A. In preparation.

B. Issued periodically. C. Issued when sufficient demand is demonstrated.

D. Prepared on request.

E. Under development.

F. See, Calibration and Test Services of the National Bureau of Standards, SP250.

Metallurgical Standards

This SRM is intended for calibrating x-ray diffraction equipment to determine the relative amounts of iron carbide in steel.

SRM Type Form

493 Spheroidized Iron Carbide (Fe 3 C) in Ferrite Wafer: 29 X 29 X 2.4 mm

Mossbauer 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

725

1541

Sodium Pentacyanonitrosylferrite II (Sodium Nitroprusside)

Platelet: 1 X 1 X 0.0775 cm

Foil: 2.5 cm X 2.5 cm X 23 iim

X-ray Diffraction Standard

SRM 640 is a powdered silicon material to be used as an internal standard for powder diffraction measurements. The lattice parameter 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) based 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 3.5 X 10"5 A.

SRM [y pL- Unit Size 640 Silicon Powder 10g

61
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 four polymer SRM's (1516, 1517, 1518, 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 Cyclohexane 400 ml 1512 400 ml 1513 400 ml 1516 38 mm diameter 2.5 mm thick 1517 38 mm diameter 5 mm thick 1518 Permittivity 51 mm diameter 2.5 mm thick 1519 Permittivity 51 mm diameter 5 mm thick

Reference Fuel Standard

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. The SRM's are certified for their boiling points, densities, freezing points, lead contents, and refractive indices.

SRM Type Unit 1815 1816

n-Heptane

Isooctane (2,2,4-Trimethylpentane)

1 -liter

1 -liter

Property 1815 1816

Density at 20 °C,g/ml

Refractive Index, lip Freezing Point, °C

Distillation: 50% Recovered, °C (760 mm of Hg)

Differential, 80% Recovered Minus 20% Recovered, °C . . Lead Content, g/3.78 liters

0.68386

1.38776 -90.636

98.427

0.004 0.0000

0.69192

1.39148 -197.383

99.238

0.007 0.0000

Resistivity Standards

SRM's 797 and 798, Electrolytic Iron and Austenitic Stainless Steel, are certified for low temperature electrical

resistivities and are intended for use in calibrating knife edge and similar electrical resistivity apparatus. SRM 797

is a medium conductivity standard with a resistivity ratio of 23.5; SRM 798, is a low conductivity standard with a

resistivity ratio of 1.32. SRM 1520, Boron-Doped Silicon, is a set of two single-crystal wafers, with nominal resistivities of 0.1 and

10 f2* cm, respectively. SRM 1520 intended for use in calibrating instruments used to measure the resistivity of

silicon wafers by four-probe method (ASTM Method F-84).

SRM Type Unit of Issue 797-1 Electrolytic Iron Rod 0j64 cm dia. X 5 cm long 797-2 Electrolytic Iron Rod 0.64 cm dia. X 10 cm long 797-3 Electrolytic Iron Rod 0.64 cm dia. X 15 cm long 798-1 Austenitic Stainless Steel Rod 0.64 cm dia. X 5 cm long 798-2 Austenitic Stainless Steel Rod 0.64 cm dia. X 10 cm long 798-3 Austenitic Stainless Steel Rod 0.64 cm dia. X 15 cm long

1520 2 Wafers 4.2 cm dia. X 1 mm thick

62
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 Material

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)

385b

386g

388i 389

391

Styrene-butadiene 1500

Butyl

Styrene-butadiene 1503

Acrylonitrile-butadiene

34,000

34,000

34,000

34,000

25,000

SRM

Rubber Compounding Materials

Type

Wt/Unit

(grams)

370d

371g

372h

373f 374c

375f

376a 377

378a 379 380

381 382a 383 384b

392

Zinc Oxide

Sulfur

Benzothiazyl disulfide Tetramethylthiuram disulfide

Light Magnesia

Phenyl-beta-naphthylamine

Oil Furnace Black

Calcium Silicate Gas Furnace Black Mercaptobenzothiazole

N-tertiary-Butyl-2-benzothiazolesulfenamide

Ethylene Thiourea

8,000

6,000

3,200

2,000

2,000

28,000

450

600

28,000

5,500

6,000

4,000

32,000

3,200

3,200

1,600

Reference Magnetic Tapes

This SRM is 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 Secondary standard magnetic tape-computer

amplitude reference Cassette 3200 Secondary standard magnetic tape-computer

amplitude reference Reel/600 ft

63
Sizing Standards

Glass Spheres for Particle Size

SRM Type Size (Mm)Sieve Nos. Wt/Unit

(grams) 1003 Calibrated Glass Spheres 5-30 4045

1004 Calibrated Glass Beads 34-120 400-140 63 1017a Calibrated Glass Beads 100-310 140-50 84

1018a Calibrated Glass Beads 225-780 60-25 74 1019 Glass Spheres 890-2590 18-8 100

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 turbidimeter 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

The ISCC-NBS Centroid Color Charts SRM 2106, ISCC-NBS Centroid Color Charts, is available to illustrate a characteristic color for each of the ISCC-NBS color-name blocks in NBS Circular 553. NBS Circular 553, The ISCC-NBS Method of Designating Colors and a Dictionary of Color Names, may be purchased from the Superintendent of Documents, U.S. Government

Printing Office, Washington, D.C. 20402, for $2 (SD Catalog No. C13.4:553). SRM 2106, along with the table containing the history of the color-names project, the centroid number, and the Munsell denotation of each of the 251 color chips included, constitutes a supplement to NBS Circular 553. Each chart set contains 18 constant-hue

centroid color charts. These centroid colors 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. The centroid color charts can also be used for approximate color specifications wherever the ISCC-NBS color designations are applicable, for statistical studies of trends in industrial color usage, or for planning lines of merchandise intended to have coordinated colors. SRM Type Unit of Issue

2106 Set of 18 charts

Paint Pigment Standards for Color and Tinting Strength

SRM Type Wt/Unit

(grams) 307 Metallic brown 60

64
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 5/8 by 3 1/4 in. The booklets contain six strips of the paper

1 1/4 in wide that have been faded by exposure in the NBS master lamp. A copy of NBS Misc. Publ. 260-41 , which

describes the preparation and use of the materials, is furnished with each booklet. SRM Type Unit of Issue 700c Light-sensitive paper Pkg. of 100 pieces-2 5/8 in X 3 1/4 in 701c Standard faded strips Booklet-6 strips 1 1/4 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

4 1/8 in, and have been standardized by the measurement of the change of transmittance as a function of exposure (in standard fading hours) to the NBS master lamps.

SRM Type Unit of Issue 702

703

Light-sensitive plastic chips

Light-sensitive plastic chips

Package of 5 chips 0.124 in thick 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's

1008 and 1009 are calibrated photographic step tablets of 21 steps that cover the optical density range from 0 to 4

and 0 to 3, respectively.

All three step tablets are designated as type Visual VI -b and are individually calibrated and certified for diffuse transmission density in conformance with conditions specified for American National Standard Diffuse Visual Transmission, type Vl-b ANSI PH2. 19-1959.

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 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.

SRM Type Unit 1001 X-ray Film Step Tablet (0-4) 1 tablet, 17 steps 1008 Photographic Step Tablet (04) 1 tablet, 21 steps 1009 Photographic Step Tablet (0-3) 1 tablet, 21 steps 1010a Set of 5 charts

Surface Flammability Standard

SRM 1002b, Hardboard Sheet, is issued for checking the operation of radiant panel test equipment in accordance

with the procedures outlined in ASTM Standard E162-67. Flame Spread Index, I

s = 190; Heat Evolution Factor, Q =

45.4.

SRM Type Certification Unit of Issue 1002b Hardboard Sheet Flame Spread Index 190 Set of 4

Heat Evolution Factor, Q 45.4 6x18x1/4 inch

65
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

1006 1007a

Non-flaming Exposure Condition (a-cellulose) . . . Flaming Exposure Condition (plastic) DM(corr) = 170

In Preparation

3 sheets, 11.7 X 9.2 in.

Water Vapor Permeance

This material is intended for use in the measurement of water vapor permeance in accordance with ASTM Method

E-96. It may also be useful in other test methods where movement of water vapor across a barrier is involved. These

SRM's are made from sheets of poly (ethylene terephthalate) approximately 0.001 inches thick (25.4 |Um). They are

certified for water vapor permeance for both dry cup and wet cup procedure.

SRM Type Certification Unit of Issue 707-1 Water Vapor Permeance Dry Cup-0.66 perm 12 sheets, 6 in diameter 707-2 Water Vapor Permeance Wet Cup-0.72 perm 6 sheets, 10 X 12 inches

Internal Tearing Resistance Standard Paper

This SRM is available for calibration of instruments used for the determination of the internal tearing resistance of paper according to methods ASTM Designation D689 and TAPPI Standard T414. Sufficient material is furnished in each unit to provide 40 or more measurements. Initial distribution is in a set of twelve packages, one package shipped

at approximately monthly intervals. Packages are also available on a four month cycle. The tearing strength value of

the material is approximately 40 g. The exact value will be given in the certificate accompanying the standard. This SRM is sold only on a subscription basis in sets of four packages or multiples thereof.

SRM Type Unit of Issue 704a Internal tearing resistance paper

i Sets of 4 packages

Linerboard Standard for Tape Adhesion Testing

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 Adhesion Testing Package of 50 sheets

66
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 further scientific or technical research on that particular material. One of

the principal considerations in issuing 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.

High Purity Materials

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 crystallographic 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.

Scanning Electron Microscope Resolution Test Specimen

RM 100, SEM Resolution Test Specimen (Al-W)—is an alloy of aluminum and tungsten in fine dendritic structure formed on the surface of a bead with an approximate diameter of 5 mm. It is to be used in evaluating the

resolution and performance of scanning electron microscopes. Each RM 100 is issued with a specific

photomicrograph that verifies the dendritic structure and its location. This Research Material can be used

repeatedly, has a long shelf life under normal storage conditions, and the microstructure features in it have

been observed in all current models of commercially available scanning electron microscopes.

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 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. Government Printing Office, Washington, D.C. 20402, for 25

cents, by SD Catalog No. CI 3.46=47.

SRM Type Wt/Unit

(grams) 1020 Zinc sulfide phosphor 14 1021 28 1022 14 1023 Zinc-cadmium sulfide phosphor (Ag activator) 14 1024 Zinc-cadmium sulfide phosphor (Cu activator) 14 1025 Zinc phosphate phosphor 28 1026 Calcium tungstate phosphor 28 1027 28 1028 28 1029 14 1030 Magnesium arsenate phosphor 28 1031 Calcium halophosphate phosphor 28 1032 28 1033 Calcium phosphate phosphor 28

67
GENERAL MATERIALS

General Materials (GM's) are being 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-2007 Attapulgus clay is distributed by NBS on request of the ASTM Committee D-2007. It is an adsorbent type

clay, 30 to 60 mesh, having adsorptive characteristics as specified by ASTM D-2007.

Computer Program Package for Metric Conversion

To assist manufacturers in dealing with both the metric and U.S. customary systems of measurement, NBS has

available a computer program package to convert from one system to the other. This package is not an NBS Standard Reference Material; it consists of computer programs developed by the

Caterpillar Tractor Co. and the General Motor Corporation, documentation to explain their use, and test problems to

verify that they run correctly on the user's computer. The NBS role was to assemble the documentation, to validate the programs, and to distribute the package. The NBS validation consisted of testing to determine that the programs

can run correctly on different computers and that they perform in accordance with the documentation.

The tape is a standard 1 /2 inch wide 600 foot long reel. It is recorded in American National Standard FORTRAN

and is available in six alternative combinations of character code and density depending upon the computer configuration upon which it is to be run.

Package No. of No. Tracks Code Density Parity

CP-1 9 ASCII 800 Odd

CP-2 9 ASCII 1600 Odd

CP-3 9 EBCDIC 800 Odd

CP-4 9 EBCDIC 1600 Odd

CP-5 7 BCD 556 Even

CP-6 7 BCD 800 Even

The tape contains 6 files. The first is a description of the contents and logical organization of the tape. The second

contains Caterpillar's METCO program; the third contains test data for that program; the fourth gives test results based on this data. The fifth file contains the GMMETR program and the sixth GMINCH.

For ordering information write:

Conversion Package

Room B3 1 1 , Chemistry Building

National Bureau of Standards

Washington, D.C. 20234

Telephone: (301)921-2045

68
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.

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 Test Services of the National Bureau of Standards. [Available from the Superintendent of Documents,

U.S. Government Printing Office, Washington, D.C. 20402, as SD Catalog No. C13. 10:250 (1970 Edition) for $2.]

These services are performed at the National Bureau of Standards Washington laboratories (Gaithersburg, 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:

Calibration and Test Services of the

National Bureau of Standards

Office of Measurement Services Room B154, Metrology Building

National Bureau of Standards

Washington, D. C. 20234

Telephone: (301)921-2805

Washington Services

Acoustics

Aerodynamics

Angular

Computer Science (general)

Density

Dosimetry in High-Energy Electron Beams

Elastic Force Measuring Devices

Electrical Instruments (AC)

Electrical Instruments (DC)

(301)921-3607

(301)921-3684

(301)921-2216

(301)921-3151

(301)921-2511

(301)921-2361

(301)921-2621

(301)921-2727

(301)921-2727

Engineering Mechanics

Engineering Tests

Flatness Flow Rate Meters

Fluid Quantity

Gamma-Ray Sources Humidity

Hydraulics

Image Optics

(301)921-2621

(301)921-3515

(301)921-2216

(301)921-3684

(301)921-3684

(301)921-2361

(301)921-2794

(301)921-3684

(301)921-2181

Impedance

Interlaboratory Testing Programs

Length

Magnetic Disk Calibrations Magnetic Measurements

Mass Neutron Sources Photography

Photometric Calibrations

(301)921-2715

(301)921-2983

(301)921-2216

(301)921-3494

(301)921-2800

(301)921-2511

(301)921-2234

(301)921-2181

(301)921-2113

69
Precision Apparatus

Proving Rings

Radiation Thermometry

Radioactivity

Radiometric Calibrations Resistance

Resistance Thermometers

Roundness

Spectrophotometric Standards

Straightness Surface Texture Thermocouples and Thermocouple Materials Thermometers, Laboratory

Ultraviolet Spectral Radiance Standard

Vibration

Voltage, High

Voltage

Weights and Measure

X- and Gamma-Ray Measuring Instruments

(301

(301

(301

(301

(301

(301

(301

(301

(30 r

(301

(301

(301

(3or

(30 i; (301

(301

(301

(301

(301

Boulder Services

All measurement services available in Boulder should be directed to:

Office of Measurement Services National Bureau of Standards

Boulder, Colorado 80302

Telephone: (303)499-3753

Cryogenics

Electromagnetics (Radio, Microwave, and Laser Frequencies)

1. Attenuation

2. Fields (Electromagnetic) and Antennas

3. Impedance

4. Laser Parameters

5. Material Properties (Electromagnetic)

6. Noise Temperature (Effective)

7. Phase Shift

8. Power

9. Voltage

Time and Frequency Measurements

70
Standards Information Services

The Standards Information Services (SIS) maintains a reference collection of some 200,000 engineering standards

issued by U.S. technical societies, professional organizations, and trade associations; State purchasing offices; U.S.

civilian government agencies; and the major foreign national and international standardizing 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 Services Room B163, 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 responds in a limited way to queries within the scope of the program by providing references, referrals, documentation, or data, as available. The program's monthly

newsletter is available on request. Inquiries or requests for further information should be directed to:

Information Services Office of Standard Reference Data Room A523, Administration Building

National Bureau of Standards

Washington, D.C. 20234

Telephone: (301)921-2583

Technical Publications

The Office of Technical Publications 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:

Office of Technical Publications Room A607, Administration Building

National Bureau of Standards

Washington, D.C. 20234

Telephone: (301)921-2318

71
GUIDE FOR REQUESTING DEVELOPMENT OF

STANDARD REFERENCE MATERIALS

The National Bureau of Standards has the function to develop, produce, and distribute Standard Reference

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 nearly 900 SRM's available, about 100 new ones in preparation, and requests for the preparation

of many others.

In developing an 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 of 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.

72
ALPHABETICAL INDEX

Page

ACIDIMETRIC 31 Benzoic acid Potassium phthalate, acid ALLOYS CHEMICAL COMPOSITION

(See also individual metals) Aluminum

Chip form 22 Wire (neutron monitor density) 42

Cobalt Chip form 22

Wire (neutron monitor density) 42 Copper (see also copper)

Chip form 22 Microprobe 29

Solid form 24

Ferro (steelmaking) 19 Gold

High-purity 29 Microprobe wire 30 High temperature

Sohu form 18

IronChip and granular form 20

Microprobe 30

Solid form 21 Lead

Chip form 22

Solid form 26 Magnesium

Chip form 23 Molybdenum

Microprobe 30

Nickel Chip form 23 Oxides 23

Solid form 26 NONFERROUS ALLOYS '.

. 22 Platinum 29 Doped, wire High purity, wire Selenium 23

Granular form

Silver 30

Microprobe

Solder Chip form 22

Solid form 26 TinChip form 23

Solid form 26 Titanium

Chip form 24

Solid form 26

Gas-in 28

Tungsten 30 Microprobe

Spelter 27

ZincChip form 24

High-purity 29

Solid form 27 Zirconium

Chip form 24

Solid form 27

ALUMINUM

Al-Co alloy (neutron density monitor wire) 42

Al-Si alloy 22

Freezing point standard 51

Metallo-organic compound 36

Radioactivity 58 Wrought alloy 22 AMERICIUM

Radioactivity 58 AMMONIUM DIHYDROGEN PHOSPHATE

Fertilizer 36 ANALYZED GASES (ENVIRONMENTAL) 33 Carbon dioxide in nitrogen Carbon monoxide in nitrogen

Nitric oxide in nitrogen

Oxygen in nitrogen

Propane in air ANALYZED LIQUIDS (ENVIRONMENTAL)

Fuel oil, trace elements in 34 Permeation tubes 34

Nickel and vanadium in residual oil 68

Sulfur in distillate fuel oil 33

Sulfur in residual fuel oil 33 ANALYZED SOLIDS (ENVIRONMENTAL) 33

Coal, Sulfur in Coal, trace elements in Coal fly ash, trace elements in ARSENIC

TridXide (oxidimetric value) 31 ASSAY STANDARDS

(See specific constituent) BARIUM

Metallo-organic compound 36 BASIMETRIC

Tris(hydroxymethyl)aminimethane 31 BENZOIC ACID

Acidimetric 31 Calorimetric 52

Microchemical 31 BIOLOGICAL STANDARDS 32

Liver, bovine Orchard leaves BISMUTH

Radioactivity 58 BORON

Boric acid 41

Boric acid (B-10 enriched) 41

Metallo-organic compound 36 CADMIUM

Metallo-organic compound 36

Radioactivity 58 Vapor pressure standard 53 CALCIUM

Carbonate (clinical ) 32 Carbonate (rubber compounding) 63

Chloride (ion selectivity) 44

Metallo-organic compound 36 Molybdate (steelmaking) 19

Silicate (rubber compounding) 63 CALORIMETRIC 52 Combustion calorimetric Heat source CANE SUGAR (Sucrose) 31

73
Page

CARBIDES

Tungsten carbide • 39 CARBON

Channel black (rubber compounding) 63 Conducting black (rubber compounding) 63 Gas furnace black (rubber compounding) 63

Oil furnace black (rubber compounding) 63 Carbon dioxide in nitrogen 33 Carbon monoxide in nitrogen 33 CARBON STEELS 10 CAST IRONS 20

Blast furnace Car wheel Chip form

Copper-nickel-chromium

Ductile Gray

High phosphorus

Nickel-chromium

Nickel-chromium-molybdenum

Nodular

Solid form

While CAST STEEL 21 CEMENTS

Portland (chemical composition) 38

Turbidimetric and fineness standard 64 CERAMIC MATERIALS

Carbides 39

Glasses 39

Minerals 38

Refractories 39 CERIUM

Radioactivity 58 CESIUM

Radioactivity 58 CHEMICAL STANDARDS

Primary 31 Acid potassium phthalate Arsenic trioxide Benzoic acid Boric acid Potassium chloride Potassium dichromate Sodium oxalate Sucrose Tris(hydroxymethyl)aminomethane

Uranium oxide

Intermediate purity Selenium 29

Zinc 23 CHLORINE

Isotopic reference standard 43

Radioactivity 58 CHROMIUM

Ferro (steelmaking) 19

Metallo-organic compound 36

Isotopic reference standard 43

Radioactivity 58

Refractories 39 CLAYS

Attapulgus(ASTM D-2007) 68

Flint 38

Plastic 38 CLINICAL LABORATORY STANDARDS 32

Bilirubin Calcium carbonate

Page

Cholesterol

Creatinine

Cortisol Glass filters for spectrophotometry Lead nitrate Liquid filters for spectrophotometry

D-Glucose Magnesium gluconate D-Mannitol Lithium carbonate Potassium chloride Quartz cuvette for spectrophotometry

Sodium chloride Thermometers, enzymology

Tris(hy droxy methyl )aminomethane

Tris(hydroxymethyl)aminomethane HC1

Urea

Uric acid VMA

COAL

Fly ash, trace elements in 34

Sulfur in 33 Trace elements in 34 COATING THICKNESS 45

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 36

Radioactivity 58

See Alloys

COLOR STANDARDS

Paint pigment 64 ISCC-NBS centroid color charts 64

Light-sensitive paper 65

Light-sensitive plastic chips 65

Tristimulus integrator systems-spectrophotometer .... 55 COPPER

Beryllium copper alloys 24

Brass Aluminum 24

Cartridge 24

Free cutting 24

Naval 24 Red 24

Sheet 22

Bronze

Cast 24 Commercial 24 Leaded tin 22

Silicon 22

Coating thickness 45

Concentrate 37

Freezing point standard 51

Gilding metal 24

Isotopic reference standard 43

Linear thermal expansion 54

Metallo-organic compound 36 Microprobe (gold-copper wires) 30

Mill heads 37

Mill tails 37

Nickel silver alloy (Cu58-Nil2-Zn29) 22

74
Page Page

DENSITY STANDARDS

Isooctane 49

n-Heptane 49

Neutron density wire 42

Photographic 65 Smoke density, flaming 66 Smoke density, non-flaming 66

2,2,4-trimethylpentane 49

X-ray 65 DEXTROSE (Glucose) 31 DIELECTRIC 62

Cyclohexane

1,2 dichloroethane Nitrobenzene DIFFERENTIAL THERMAL ANALYSIS 53 ENVIRONMENTAL STANDARDS 33 Analyzed gases Analyzed liquids Analyzed solids ELASTICITY 49 ELECTRICAL RESISTIVITY 62 EMITTANCE 56 ETHANOL 35 FELDSPARS 38 Soda

Potash FERTILIZER

Ammonium dihydrogen phosphate 36 Phosphate rock 37 Potassium dihydrogen phosphate 36

Potassium nitrate 36 FILTERS 55

Glass for spectrophotometry

Liquid for spectrophotometry

Spectrophotometer-tristimulus integrator systems

FISSION TRACK GLASSES

FLAMMABILITY STANDARDS 65 Flame spread index (hardboard sheet) Smoke density, flaming

Smoke density, non-flaming

FLUORSPAR 37

Assay

Geological

FORENSIC STANDARDS 35 Ethanol

Glass, refractive index FREEZING POINT STANDARDS 51 Defining fixed points Tin

Zinc Determined reference points

Aluminum

Copper

Lead

Mercury

Tin

Zinc FUELS (FOSSIL)

Coal fly ash, trace elements in 34

Coal, sulfur in 33

Coal, trace elements in 34

Isooctane 49

n-Heptane 49

Oil, nickel and vanadium in residual fuel 68

Oil, sulfur in fuel 33

Oil, trace elements in fuel 34

GASES, ANALYZED 33 Carbon dioxide in nitrogen

Carbon monoxide

Nitric oxide in nitrogen

Nitrogen dioxide permeation tube Oxygen in nitrogen

Propane in air Sulfur dioxide permeation tubes GASES, IN METALS 28

Iron alloys

Steels Titanium alloys Zirconium alloys GASOLINE 62 Lead in, octane determination GENERAL MATERIALS 68

Clay, attapulgus (ASTM D-2007)

Hydrogen in steel Nickel and vanadium in residual oil GEOLOGICAL 37

Fluorspar

GLASS

Chemical composition 39

Filters for spectrophotometry 55

Fission track 43

Physical properties 48

Refractive index 57

Spheres for sieve calibration (sizing standards) 64

Stress-optical coefficient 48

Trace elements in 40 GLUCOSE (Dextrose)

Clinical '. 32

Primary chemical 31 GOLD

Coating thickness 45 on epoxy

on Fe-Ni-Co glass sealing alloy on nickel High-purity 29 Microprobe standards (gold-copper wire) 30

Microprobe standards (gold-silver wire) 30 Vapor pressure standard 53 HEAT SOURCE 52 Zirconium-barium chromate HIGH-PURITY METALS 29

Gold, wire and rod

Platinum, doped

Platinum, wire Zinc HIGH TEMPERATURE ALLOYS 18 HYDROCARBON BLENDS 35 HYDROGEN

in steel (GM-1, GM-2) 68

in titanium 28

Radioactivity standards 58 INTEGRATOR SYSTEMS (COLOR FILTERS) 55 ION-ACTIVITY 44

Ion-selective electrodes pD standards pH standards IRON

Chip form 10

Electrical resistivity 62

Metallo-organic compound 36 Ore 37

Radioactivity 58

Solid form 14 Thermal conductivity 53

75
Page Page

IODINE

Radioactivity 58 ISOTOPIC REFERENCE STANDARDS 43

Boron, natural Boron, enriched Bromine

Chlorine Chromium

Copper

Lead, equal atom, (206/208)

Lead, natural Lead, radiogenic, 92% lead-206 Magnesium

Rhenium

Rubidium

Silver Strontium KRYPTON

Radioactivity 58 LEAD

Alloys 22

Bearing metal 22

Freezing point 51

Gasoline 33

Isotopic reference standards 43

Metallo-organic compound 36

Solder 22 LIGHT SENSITIVE STANDARDS 65

Light sensitive papers

Paper, standard faded strips Light sensitive plastic chips . LIMESTONE 38

Argillaceous Dolomitic LINERBOARD STANDARD FOR TAPE ADHESION

TESTING 66 LIQUIDS, ANALYZED

Lead in gasoline 33

Nickel and vanadium in residual oil 68

Sulfur in residual fuel oil 33

Sulfur in distillate fuel oil 33 LITHIUM

Metallo-organic compound 36

Ores 37 LOW ALLOY STEELS

Chip form 10

Solid form 14 MAGNESIUM

Alloy 23 Gluconate, clinical 32

Isotopic reference standard 43

Magnesia, light (MgO) (rubber compounding) 63

Metallo-organic compound 36 MAGNETIC

Susceptibility standard 54

Tape, computer amplitude reference secondary standards 63 MANGANESE

Fluoride, magnetic susceptibility 54

Metallo-organic compound 36 Ore 37 MARAGING STEELS 18 MERCURY

Metallo-organic compound 36

Radioactivity 58

Trace element in water 33

MELTING POINTS

Alumina 51 METALLO-ORGANIC COMPOUNDS 36 Aluminum

Barium Boron Cadmium

Calcium Chromium

Cobalt Copper

Iron Lead

Lithium Magnesium

Manganese

Mercury

Nickel Phosphorus

Potassium

Silicon

Silver Sodium

Strontium

Tin Vanadium

Zinc METALS

Alloys-see index entry Elements—see index entry High-purity 29 Gas in 28

Microprobe 29

Resistivity, electrical 62 Vapor pressure 53 Thermal conductivity 53

Freezing points 51 METALLURGICAL STANDARDS 61

Iron carbide in ferrite MICROCHEMICAL STANDARDS 31

Acetanilide

Anisic acid Benzoic acid o-Bromobenzoic acid m-Chlorobenzoic acid Cystine

p-Fluorobenzoic acid

Nicotinic acid Triphenyl phosphate

Phosphate Urea MICROCOPY RESOLUTION TEST CHARTS 65 MICROPROBE STANDARDS 29

Cartridge brass Gold-copper

Gold-silver Iron-3% silicon Tungsten-20% molybdenum

MINERALS 38

Clays

Flint

Plastic Feldspar Potash Soda

Limestone

Argillaceous Dolomitic

76
Page Page

Ores 37 Copper concentrate Copper millheads Copper milltails Fluorspar

Iron, Sibley Lithium Manganese

Molybdenum concentrate Phosphate rock

Zinc MOLECULAR WEIGHT STANDARDS 50

Polyethylene, branched

Polyethylene, linear Polystyrene, narrow molecular weight distribution Polystyrene, broad molecular weight distribution MOLYBDENUM

Concentrate (ore) 37 Microprobe 29 MOSSBAUER STANDARDS 61 NEUTRON DENSITY MONITOR WIRE

Cobalt in aluminum 42 NICKEL

Alloys

Chip form 23

Solid form 26 Coating thickness 45 on brass on steel Fuel oil 68

Metallo-organic compound 36

Oxides 23

Radioactivity 58 NIOBIUM

Radioactivity 58 NITRIC OXIDE

In nitrogen 33 NITROGEN IN 28

Cast iron Ingot iron

Steel Titanium Zirconium

NONFERROUS ALLOYS 22 NUCLEAR MATERIALS 41 Neutron density monitor wire Plutonium assay Plutonium isotopic

Uranium assay Uranium isotopic OIL

Nickel and vanadium in 68

Sulfur in 33

Trace element in 34 ORES 37 Copper concentrate Copper millheads Copper milltails Iron, Sibley Lithium

Lepidolite

Petalite Spodumene

Manganese

Molybdenum concentrate Phosphate rock

Zinc concentrate

OXALIC ACID

Radioactivity 58 OXIDIMETRIC 31 Arsenic trioxide Potassium dichromate Sodium oxalate OXIDES

Magnesium (rubber compounding) 63

Nickel ' 23 Titanium 38 Uranium 31 Zinc (rubber compounding) 63 OXYGEN IN 28

Ingot iron Nitrogen

Steel Titanium Zirconium PAINT 64 PAPER

Internal tearing resistance standard 66

Light sensitive 65 Faded strips 65 PERMEANCE, WATER VAPOR 66 PERMEATION TUBES 34

Nitrogen dioxide

Sulfur dioxide PERMITTIVITY 62 pD STANDARDS 44 Disodium hydrogen phosphate

Potassium dihydrogen phosphate

Sodium bicarbonate Sodium carbonate pH STANDARDS 44

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 HC1 PHOSPHATE

Ammonium dihydrogen 36

Potassium dihydrogen 36

See, pH standards Rock 37 PHOSPHORS 67 PHOSPHORUS

Ferro (steelmaking alloy) 19

Metallo-organic compound 36 PHOTOGRAPHIC 65 Microcopy resolution test charts Step tablets PLATINUM 29 Doped, wire

High-purity, wire PLUTONIUM 41

Metal assay Standard matrix

Sulfate tetrahydrate

POLONIUM 58

Radioactivity standard POLYMER

Molecular weight 50

Permittivity 62

77
Page POLYETHYLENE

Branched

Linear POLYSTYRENE, MOLECULAR WEIGHT

Broad distribution Narrow distribution POTASSIUM

Acid phthalate (pH standard) Dichromate (oxidimetric) Metallo-organic compound „ See, Fertilizer See, Ion activity standards PRIMARY CHEMICALS

Arsenic trioxide Benzoic acid Boron

Dextrose Plutonium metal Plutonium sulfate tetrahydrate Potassium chloride Potassium dichromate

Potassium acid phthalate

Rubidium chloride Sodium oxalate Strontium carbonate Strontium-88 spike Sucrose Tris(hydroxymethyl)aminomethane

Uranium metal Uranium oxide PROMETHIUM

Radioactivity

PROPANE

QUARTZ

a- for HF solution calorimetry Cuvette for spectrophotometry

RADIOACTIVITY STANDARDS

Alpha-particle standards

Beta-particle and gamma-ray gas standards

Beta-particle, gamma-ray, and electron-capture solution standards Contemporary standard for carbon— 14 dating laboratories Environmental standards Gamma-ray "point source" standard Mixed radionuclides test standard Radium gamma-ray solution standards Radium solution standards for radon analysis

RADIUM

Radioactivity

RADON

Radioactivity

REFLECTANCE, SPECULAR SPECTRAL

REFRACTIVE INDEX

Glass Isooctane n-Heptane

Trimethylpentane, 2,2, 4- REFACTORY MATERIALS

RESEARCH MATERIALS

Aluminum ultra-purity

Phosphors

SEM resolution test specimen

RESISTIVITY

Electrical Silicon RHENIUM, isotopic and assay RUBBER

50 RUBBER COMPOUNDING STANDARDS

RUBIDIUM

Isotopic reference standard 50 SELENIUM

Metal

Radioactivity

SILICON

44 Ferro (steelmaking alloy) 31 Metallo-organic compound

36 Refractories (Si02 ) Resistivity X-ray diffraction, powder

36 SILVER

Alloys (microprobe)

Isotopic reference standard

Metallo-organic compound

SIZING STANDARDS

Cement

Calibrated glass spheres Turbidimetric and fineness (cement)

SMOKE DENSITY CHAMBER STANDARDS

SODIUM

Bromide (isotopic) Metallo-Organic compound

Oxalate

Radioactivity

See, Ion-Activity Standards SOLDER

Chip form

Solid form SOLIDS, ANALYZED

58 SPECTROPHOTOMETRIC STANDARDS

33 Color filters Glass filters 52 Liquid filters 55 Quartz cuvette 58 SPECULAR SPECTRAL REFLECTANCE

Aluminum on glass Gold on glass STAINLESS STEEL

Chip form

Resistivity Solid form STEELMAKING ALLOYS

Calcium molybdate

Ferrochromium (high carbon)

Ferrochromium (low carbon)

Ferroniobium

Ferrophosphorus

58 Ferrosilicon (50%)

Silicon, refined 58 STEEL, THERMAL CONDUCTIVITY . . . 56 STEELS, CAST

57 STEELS, CHIP FORM

High alloy Low alloy Low alloy, special Plain carbon

38 Stainless 67 Tool STEELS, GAS-IN

STEELS, GRANULAR FORM

STEELS, SOLID FORM

62 Cast High temperature alloy Low alloy 43 Low alloy, special 63 Maraging

78
Page

Oxygen

Stainless Tool STEP TABLETS 65

Photographic

X-ray STRONTIUM

Isotopic reference 43

Metallo-organic compound 36

Radioactivity 58 SUCROSE 31 Primary chemical SULFUR

Elemental (rubber compounding) 63

in residual fuel oils 33

in coal 33 SUPERCONDUCTIVE THERMOMETRIC FIXED POINT

DEVICE 51 SURFACE FLAMMABILITY STANDARD 65 TAPE, MAGNETIC-SECONDARY REFERENCE 63

Cassette Reel TEMPERATURE

Calorimetry 52

Differential thermal analysis 53

Heat source 52 THERMAL CONDUCTIVITY 53 THERMAL EMITTANCE STANDARDS 56 THERMAL EXPANSION 54 THERMOCOUPLE MATERIALS 54 THERMOMETERS, Enzymology (clinical) 32 THORIUM

Radioactivity 58 TIN

Bearing metal 23 Chip form 23

Coating thickness 45

Freezing point 51

Metallo-organic compound 36

Solid form 26 TITANIUM

Chip form 24 Dioxide 38

Gases in 28

Page

Metallo-organic compound 36

Solid form . 26 Unalloyed for oxygen 28 TRACE ELEMENTS

Biological matrices 32

Environmental standards 34

Fuels 33

Glass matrices : 40

Metallo-organics 36 TUNGSTEN

Carbide 39 Microprobe 29 TURBIDIMETRIC AND FINENESS STANDARD .... 64 URANIUM 41 Metal Oxide

Depleted

Enriched Primary standard 31 VANADIUM

Fuel oil 68

Metallo-organic compound 36 VAPOR PERMEANCE, WATER 66 VAPOR PRESSURE STANDARD 53 VISCOSITY STANDARDS

Glass 48 WATER VAPOR PERMEANCE 66 X-RAY STEP TABLET 65 X-RAY DIFFRACTION 61

Silicon powder

YTTRIUM

Radioactivity 58 ZINC

Concentrate, ore 37

Freezing point 51 High purity 29

Intermediate purity 29

Metallo-organic compound 36 Oxide (rubber compounding) 63

Spelter modified 27 ZIRCONIUM

Metal 27

Zircaloy-2 24

79
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 B314, 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. General Material: Information provided, but not certified by NBS.

G. Set of SRM's: Issued with Certificates for the individual SRM's.

Certificate Certificate Certificate Date Page SRM Date Page SRM Date Page

1 b 1 1-8-66P 38 64b 1-8-62 19 125b 4-10-70 11 3c 3-17-69 20 65d 10-30-58 10 126c 12-6-72 12 4k D 20 70a 3-26-65P 38 127b 1-25-68P 22 SL 1 1-9-70 20 71 2-1-29 19 129c 8-7-73 1

1 1-9-70 20 72f 7-20-65 1

131b 7-16-69 12

7"'6 10-5-59 20 73c 7-13-66 12 132b 11-7-72P 13

8ij 4-10-72 10 76a 39 133a 6-8-56 12 lOe 10-14-65 10 77a D 39 134a 5-6-57 13 llh 4-30-74 10 78a D 39 136c 3-24-70P 31 12h 3-7-66 10 79a 12-6-71 37 139a 12-17-59 11 13g 4-30-74 10 82b 4-12-66 20 140b 4-16-70 31 14e 11-9-65 10 83c 4-16-70P 31 141b 11-23-65 31 15g 4-30-74 10 84h 7-9-69 31 142 7-9-69 31 16e 4-30-74 10 85b 5-9-57 22 143c D 31 17a 12-26-67 31 87a 11-17-69P 22 147 7-9-69 31 19g 9-30-64 10 88a 1-31-67P 38 148 12-22-70 31 20g 10-23-70 10 89 8-27-32 39 152a 10-11-65 10 25c 4-25-66P 37 90 10-1-28 19 153a 1-5-60 13 27e 6-21-66 37 91 6-15-31 39 154b 11-15-72 38

30f 12-23-66P 1

92 4-30-71

39 155 10-146 11 32e 4-5-57 1 1 93a 8-31-73 39 157a 10-16-58 22 33d 6-10-55 1

94c 1-18-73 24 158a 8-8-61 22 36b 7-18-69 1

97a 10-8-69 38 160b 8-4-69P 12 37e 8-28-58 22 98a 10-8-69 38 162a 12-18-58 23

39i 7-15-68 52 99a 3-26-65P 38 163 1-11-68 13 40h 4-24-69P 31 100b 8-18-59 11 166c 3-17-70 12 41a 12-26-67 31 lOlf 5-19-70 13 168 1-12-56P 22 42g 7-18-72 51 103a 9-28-62 39 171 11-27-51 23 43h 1-12-73 51 105 4-22-37P 1

173a 4-25-66P 24 44f 4-5-73 51 106b 3-24-61 1

174 8-20-70P 24 45d 12-6-71 51 107b 11-1-62 20 176 8-20-70P 24 49e 12-6-71 51 113a 1-25-74 37 178 7-14-69 10 50c 6-25-57 13 114m 4-15-73 64 180 3-31-71 37 51b 10-20-57 10 115a 4-19-62 20 181 8-20-70P 37 53e 1-20-70 22 120b 7-31-72 37 182 8-20-70P 37 54d 9-20-57 23 121d 7-7-71

12 183 8-20-70P 37 57 2-7-73 19 122e 11-6-69 20 184 4-10-57 22

58a 7-19-73 19 123c 7-7-7 IP 12 185e 12-5-72 44

59a 11-6-69 19 124d 11-6-70 22 1861c 9-1-70 44

80
Certificate Date Page

18611c 9-1-70 44 187b 9-9-70 44

188 1-10-64 44

189 1-10-64 44

191 715-68 44 192 7-15-68 44

193 12-1-72 36 194 1-8-74 36 195 7-19-73 19 196 11-9-70 19 198 1-6-60 39 199 1-6-60 39 200 6-28-74 36 217b-5 9-28-62 49

217b-8S 9-28-62 49

217b-25 9-28-62 49

276 2-26-74 39 291 D 13 293 D 13 307 11-344 64 329 1-25-74 37 330 2-20-73 37 331 2-20-73 37 332 2-20-73 37 333 2-20-73 37 335 4-7-66 10 336 6-19-73 10 337 8-16-66 10 339 7-21-65 12 340 11-9-70 19 341 3-26-62 20 342 1-5-62 20 342a 4-27-70 20 343 5-28-62 12 344 10-2-63 12 345 1-23-64 12 346 7-14-65 12 348 1-17-66P 12 349 5-15-59P 23 350 4-15-58 31 352 8-7-61 28 353 8-7-61 28 354 8-7-61 28 355 9-8-66 28 356 9-8-66 28 360a 1-30-67 24 361 7-26-70P 1 1

362 7-27-70P 11 363 9-30-70P 11 364 6-1 6-7 IP 11 365 7-28-70P 20 366 G 11 370d c 63 371g c 63 372h c 63 373f c 63 374c c 63 375f c 63 376a c 63 377 c 63 378a c 63 379 c 63 380 c 63 381 c 63 382a c 63 383 c 63 384b c 63

Certificate SRM Date Page

385b 8-15-67 63 386e 10-10-69 63

388i 4-7-72 63 389 6-2-66 63

391 2-14-69 63 392 c 63 404a 5-5-65 14 405a 5-5-65 14 407a 5-5-65 14 408a 5-5-65 14 409b 5-5-65 14 413 5-5-65 14 414 5-5-65 14 417a 5-5-65 14 418 5-5-65 14 418a 5-5-65 14 420a 5-5-65 14 427 5-5-65 14 431 6-23-50P 7fi 432 6-23-50P - u 433 6-23-50P \J *. J Jul — V 434 6-23-SOP 76 435 6-23-50P 7fi 436 9-22-59 19 437 9-22-59 19 438 9-22-59 1 Q 439 9-22-59 19 440 9-22-59 19 441 9-22-59 19 442 10-25-65 17 443 1 0-2 S-fis 17 444 17 445 11 y-\j\j 17 446 1-19-66 1 7

447 1-19-66 1 448 1-19-66 17 449 1-19-66 17 450 1-19-66 17 461 5-5-65P 1 5

462 5-5-65P 1 463 5-5 -6 5 P 1 5

464 5-5-65P 15 465 5-5-6 5 P 15 466 5-5-6 5 P 15 467 5-5-65P 15 468 5-5-65 P 15 478 2-28-74 30 479 10-16-72 30 480 1 1-22-68P 30 481 2-14-69 30 482 6-6-69 30 483 6-11-71 30 493 8-28-70 61 593 4-1-61 35

->SQ47H 4-1-61 35 J7J 4-1-61 35 J70 4-1 -f> 1 35 SQ7 4.-1 -f, 1 35 SQQ HI4 1 f.O 11 fif)7 DU / S 7 1 -71 40 608 G 40 609 G 40 610 8-8-72P 40

611 8-8-72P 40 612 8-8-7 2P 40 613 8-8-72P 40 614 8-8-72P 40

Certificate Date Page

615 8-8-72P 40 616 8 8-72P 40 617 8-8-72P 40 618 G 40 619 G 40 620 5-17-72P 39 621 D 39 625 4-24-64 27 626 4-24-64 27 627 4-24-64 27 628 4-24-64 27 629 4-24-64 27 630 4-24-64 27 631 4-16-70P 27 633 6-11-73 38 634 6-11-73 38 635 6-11-73 38 636 6-11-73 38 637 6-11-73 38 638 6-11-73 38 639 6-11-73 38 640 6-20-74 61 641 1-26-60P 26 642 1-26-60P 26 643 1-26-60P 26 644 1-26-60P 26 645 1-26-60P 26 646 1-26-60P 26 654a 3-22-71P 26 661 8-15-72P 15 662 8-15-72P 15 663 2-12-73 15 664 2-12-73 15 665 2-12-73 15 666 G 16 667 G 16 668 G 16 671 9-12-60 23 672 9-12-60 23 673 9-12-60 23 680L-1 12-2 8-6 7 P 29 680L-2 12-28-67P 29 681 L-l 12-28-67P 29 681L-2 12-28-67P 29 682 2-1 -7 IP 29 683 7-9-68P 29 685-R 9-26-68P 29 685-W 9-26-68P 29 700c B 65 701c 10-1-71 65 702 1 1-1-66 65 703 11-1-66 65 704a Undated 66 705 1-17-72 50 706 Undated (1963) 50 707 1-17-72 66 708 9-15-73 48

709 12-13-72 48 710 6-29-62 48

71 1

7-1-64 48

712 10-4-65 48 713 10-4-65 48

714 104-65 48

715 9-7-66 48 716 9-7-66 48

717 11-18-69 48

718 4-28-72 49

81
Certificate Certificate Certificate M Date Page SRM Date Page SRM Date

720 8-26-70 52 837 9-22-59 19 1004 4-3-72 64 723 7-14-70 31 D837 9-22-59 19 1006 104-71 66 724a 9-24-73 52 838 9-22-59 19 1007a D 66

725 3-1-71P 61 D838 9-22-59 19 1008 1-23-73 65 726 1-31-67 23 D839 9-22-59 19 1009 1-23-73 65 728 7-9-68 24 840 9-22-59 19 1010a B 65 731-L1 7-31-72 54 D840 9-22-59 19 1016 1-17-69P 38 731-L2 7-31-72 54 D841 9-22-59 19 1017a 9-24-71 64

731-L3 7-31-72 54 845 1-19-66 17 1018a 5-16-73 64 733 12-30-71 54 D845 1-19-66 17 1019 1-17-66 64

734-S 6-14-71 53 D846 1-19-66 17 1020 E 67 734-L1 6-14-71 53 D847 1-19-66 17 1021 E 67 734-L2 6-14-71 53 849 1-19-66 17 1022 E 67

735-S 12-1 1-74 53 D849 1-19-66 17 1023 E 67 735-M1 12-11-74 53 850 1-19-66 17 1024 E 67 735-M2 12-11-74 53 D850 1-19-66 17 1025 E 67 735-L1 12-1 1-74 53 911a 6-6-74 32 1026 E 67 735-L2 12-11-74 53 912 9-24-68 32 1027 E 67 736-L1 11-19-66 54 913 9-24-68 32 1028 E 67 736-L2 11-19-66 54 914 9-24-68 32 1029 E 67 736-L3 11-19-66 54 915 3-4-69 32 1030 E 67 737-L1 D 54 916 3-1 0-7 IP 32 1031 E 67 737-L2 D 54 917 11-18-70 32 1032 E 67 737-L3 D 54 918 1-22-71 32 1033 E 67 739-L1 5-12-71 54 919 8-6-73 32 1051b 7-15-68 36 739-L2 5-12-71 54 920 1-17-72 32 1052b 3-1-68 36 739-L3 5-12-71 54 921 4-5-73 32 1053a 1-23-70 36 740 2-14-70 51 922 12-13-73 32 1055b 7-23-68 36 741 7-18-72 51 923 12-13-73 32 1057b 8-5-68 36 742 6-5-70 51 924 11-23-73 32 1059b 7-15-67 36 745 5-14-69 53 925 12-26-73 32 1060a 4-24-64 36 746 8-11-70 53 930b A(2-24-75) 32 1061c 9-9-70P 36 747 D 53 931a D 32 1062a 4-24-64 36 748 8-10-70 53 932 A (11-5-73) 32 1063a 4-24-64 36 749 D 53 933 A (8-23-74) 32 1064 4-24-64 36 758 6-11-71 53 934 A (8-1-74) 32 1065b 11-1-67 36 759 6-1 1-71 53 944 2-14-69 42 1066a 4-23-69 36 760 6-11-71 53 945 9-6 -7 2 P 42 1069b 2-13-69 36

763-1 4-5-73 54 946 12-3-7 IP 42 1070a 4-24-64 36 763-2 4-5-73 54 947 12-3-7 IP 42 1071a 4-24-64 36 763-3 4-5-73 54 948 9-1-72P 42 1073b 7-15-67 36

764-1 4-5-73 54 949d 1-23-73 42 1074a 5-13-66 36 764-2 4-5-73 54 950a 10-27-69 42 1075a 10-25-67 36

765-1 4-5-73 54 951 10-21-71 43 1076 4-24-64 36 765-2 4-5-73 54 952 10-21-71 43 1077a 2-10-68 36 765-3 4-5-73 54 953 3-12-69 42 1078b 7-25-72 36

766-1 4-5-73 54 960 5-12-72 42 1079b 2-26-69 36 767 11-20-67 51 961 6-26-73 43 1080a 2-26-69 36 797 5-13-74 62 962 6-21-73 43 1089 G 28 798 5-13-74 62 963 6-22-73 43 1090 4-2-69 28 803a 5-5-65 14 964 6-22-73 43 1091 4-2-69 28 D803a 5-5-65 14 975 3-11-65 43 1092 4-2-69 28 804a 5-5-65 14 976 3-24-65 43 1093 34-69P 28 805a 5-5-65 14 977 3-24-65 43 1094 6-12-69P 28 D805a 5-5-65 14 978 3-24-65 43 1095 10-23-70 28 807a 5-5-65 14 979 5-3-66 43 1096 6-13-72 28 D807a 5-5-65 14 980 1-31-67 43 1097 5-26-72P 28 808a 5-5-65 14 981-3 4-10-73 43 1098 10-3-73 28 809b 5-5-65 14 984 7-27-70 43 1099 7-28-70P 28 D809b 5-5-65 14 987 3-6-72P 43 1101 7-31 -64 P 25 810a 5-5-65 14 988 10-4-72 43 C1101 7-31-64P 25 817a 5-5-65 14 989 5-22-73 43 1102 7-31-64P 25 820a 5-5-65 14 999 9-6-72 31 1103 8-13-65 25 D820a 5-5-65 14 1001 11-15-73 31 C1103 8-13-65 25 821 5-5-65 14 1002b 12-71 31 1104 8-13-65 25 827 5-5-65 14 1003 7-1-65P 64 CI 104 8-13-65 25

82
Certificate Certificate Certificate SRM Date Page SRM Date Page SRM Date

1105 7-14-65P 25 1197 1-10-74 18 1372

A 45 CI 105 8-13-65 25 1198 1-10-74 18 1373 A 45 1106 11-17-69P 25 1199 1-10-74 18 1374 A 45 C1106 11-17-69P 25 1200 1-10-74 18 1375 A 45 1107 11-17-69P 25 1201 1-10-74 18 1376 A 45 CI 107 11-17-69P 25 1206-2 11-6-70P 18 1377 A 45 U08 11-17-69P 25 1207-1 11-6-70P 18 1378 A 45 C1108 11-17-69P 25 1207-2 11-6-70P 18 1381 A 45 1109 7-14-65P 25 1208-1 11-6-70P 18 1382 A 45 C1109 8-18-70P 25 1208-2 11-6-70P 18 1-383 A 45 1110 8-18-70P 25 1209 G 18 1384 A 45 C1110 8-18-70P 25 1212a 2-14-74 27 1385 A 45 1111 8-18-70P 25 1261 8-16-72P 15 1386 A 45 Cllll 8-18-70P 25 1262 8-16-72P 15 1398 A 45 1112 1-17-69P 25 1263 8-16-72P 15 1399 A 45 C1112 1-17-69P 25 1264 2-12-73 15 1402 4-11-66 56 1113 1-17-69P 25 1265 8-15-72 15 1403 4-11-66 56 C1113 1-17-69P 25 1266 G 16 1404 4-11-66 56 1114 1-17-69P 25 1301 A 45 1405 4-11-66 56 C1114 1-17-69P 25 1302 A 45 1406 4-11-66 56 1115 2-19-70P 25 1303 A 45 1407 4-11-66 56 C1115 2-19-70P 25 1304 A 45 1408 4-11-66 56 1116 2-19-70P 25 1305 A 45 1409 4-11-66 56 C1116 2-19-70P 25 1306 A 45 1420 12-16-65 56 1117 2-19-70P 25 1307 A 45 1421 12-16-65 56 C1117 2-19-70P 25 1308 A 45 1422 12-16-65 56 1118 7-14-65P 25 1309 A 45 1423 12-16-65 56 C1118 2-26-70P 25 1310 A 45 1424 12-16-65 56 1119 7-14-65P 25 1311 A 45 1425 12-16-65 56 C1119 2-26-70P 25 1312 A 45 1427 12-16-65 56 1120 7-14-65P 25 1313 A 45 1428 12-16-65 56 CI 120 2-26-70P 25 1314 A 45 1440 12-16-65 56 1121 12-19-66P 25 1315 A 45 1441 12-16-65 56 C1121 12-19-66P 25 1316 A 45 1442 12-16-65 56 1122 12-19-66P 25 1317 A 45 1443 12-16-65 56 CI 122 12-19-66P 25 1318 A 45 1444 12-16-65 56 1123 12-19-66P 25 1319 A 45 1445 12-16-65 56 CI 123 12-19-66P 25 1320 A 45 1475 12-2-71 50

1131 1-25-68P 26 1331

A 45 1476 11-6-69 50 1132 1-30-70 26 1332 A 45 1511 4-24-69 62 1134 4-30-70 15 1333 A 45 1512 7-2-69 62 1135 7-27-72 15 1334 A 45 1513 9-17-69 62 1136 8-31-73 15 1335 A 45 1516 7-9-69 62 1138 7-13-70 21 1336 A 45 1517 7-9-69 62 1139 7-13-70 21 1337 A 45 1518 7-9-69 62 1140a 9-15-73 21 1338 A 45 1519 7-9-69 62 1141a 9-15-73 21 1339 A 45 1520 1-8-74 62 1142a 9-15-73 21 1341 A 45 1541 3-1 -7 IP 61 1143 12-22-69 21 1342 A 45 1571 10-1-71P 32 1144 12-22-69 21 1343 A 45 1577 4-15-72P 32 1147a 4-8-74 21 1344 A 45 1579 1-23-73 33 1148 12-22-69 21 1345 A 45 1600 1-14-73 63 1149 12-22-69 21 1346 A 45 1604a 1-25-71 33 1152 2-9-66 17 1351 A 45 1607 3-1-68 33 1154 2-9-66 17 1352 A 45 1609 3-1^68 33 1155 8^-69P 17 1353 A 45 1621 12-11-67 33 1156 4-5-66P 18 1361 A 45 1622 12-5-74 33 1157 8-6-73 19 1362 A 45 1623 4-7-71 33 1158 12-13-72 18 1363 A 45 1624 4-7-71 33 1159 2-18-69P 26 1364 A 45 1625 A(l-5-73) 34 1160 2-18-69P 26 1365 A 45 1626 A(8-12-71) 34 1166 5-5-65P 15 1366 A 45 1627 A(8-12-71) 34

1169- 1-10-74 15 1367

A 45 1629

D 34 1170a 2-2-74 15 1368 A 45 1631 8-15-73 34 1171 7-7-7 IP 17 1369 A 45 1632 10-1-74 34 1172 7-7-71P 17 1370 A 45 1633 10-10-74 34 1185 2-4-59P 17 1371 A 45 1634 D 34

83
Certificate

VI Date Page

1636 I) 33 1637 D 33 1638 D 33

1641 8-27-74 33 1642 8-16-74 33 1651 11-12-68 52 1652 11-12-68 52 1653 11-12-68 52

1654 4-7-71 52 1665 4-5-73 33 1666 4-5-73 33 1667 4-5-73 33 1668 4-5-73 33 1669 4-5-73 33 1673 3-30-73 33 1674 3-30-73 33 1675 3-30-73 33 1677 1 1-20-73 33 1678 1 1-20-73 33 1679 1 1-20-73 33 1680 11-20-73 33 1681 11-20-73 33 1683 D 33 1684 33 1685 33 1686 D 33 1687 D 33 1810 5-5-72 66 1815 8-14-74 49 1816 8-16-74 49 1820 9-6-74 35 1821 D 35 2005 A(4-16-71) 56 2006 A(4-16-71) 56 2007 A(4-16-71) 56 2008 A(4-16-71) 56

2101-5

A 55 2106 c 64

2141 8-28-70 31 2142 9-1-70 31 2143 1-23-73 31 2144 4-5-73 31 2186-1 5-28-68 44

2186-11 5-28-68 44 2191 5-28-68 44 2192 5-28-68 44 2201 2-22-71 44 2202 2-22-71 44 2203 5-21-73 44 2301 A 44 2302 A 45 2303 A 45 2304 A 45 2305 A 45 2306 A 45 2307 A 45 2308 A 45 2311 A 45

Certificate SRM Date Page A 45 Ar\ 45

7^1 4 A 45

7^1 5 Ar\ 45 2316 A 45 2317 A 45 2318 A 45 2331 A 45 2332 A 45 2333 A 45 2334 A 45 2335 A 45

2*336

A 45 2338 A 45 2339 A 45 2340 A 45 3200 A(5-5-71) 63 4200-B A(3-69) 58 420 1-B A(6-70) 58 4202-B A(3-1-68) 58 4203-C A(4-10-73) 58 4207 A(3-69) 58

4209-B A(6-69) 58 4210 A(5-69) 58 4211 A(5-70) 5ft 4212 A(6-71) 58 4213 A(5-70) 58 4214 A(6-73) 58 4215-B A(7-l-74) 58 4216-B A(7-l-74) 58 4217 A(9-74) 58 4219 6-74 58 4222 8-67 58 4223 8-67 58 4224 8-67 58 4776 o \ ) y 58 4778-R 4-71 58 477Q 58 47^7 Q-74 58 t td j j 4.7 K.TX 5858

474f> ftp ii *J/ 58 4245 Oft S-74 58 4246 5-74 58 4247 5-74 58 4260 8-74 58 4^0 n\t 5ft 4331 D 58 4332 1 fl-74 5X 4333 10-74 58 4904-D A(4-70) 58 4906 A(5-69) 58 4907 A(2-19-74) 58 4921-C 8-6-64 58 4922-E A(5-67) 58 4925 7-58 58 4926 9-3-61 58 4927 9-3-61 58

Certificate SRM Date Page

4929-C 6-70 58 4935-C 7-69P 58 4940-B 1-4-68 58 494 1-D 8-15-73 58 4943 1962 58 4947 2-10-64 58 4949 9-24-73 58 4950-B 5-68 58 4951 11-56 58 4952-B D 58 4953 5-68 58 4955 3-1-68 58 4956 3-1-68 58 4957 A(3-l-68) 58 4958 A(3-l-68) 58 4959 A(3-l-68) 58 4960 A(3-l-68) 58 4961 A(3-l-68) 58 4962 A(3-l-68) 58 4963 A(3-l-68) 58 4964-B A(12-31-65) 58 4990-B B 58 4991-C A(5-69) 58 4996-B A(5-69) 58 4999-E A(2-74) 58 U-0002 7-30-70P 42

U-005 4-21-69P 42 U-010 4-21-69P 42

U-015 4-21-69P 42

U-020 4-21-69P 42

U-030 4-21-69P 42 U-050 4-21-69P 42 U-100 6-23-66P 42 U-150 8-5-66P 42

U-200 6-1-66P 42 U-350 5-23-66P 42 U-500 5-24-66P 42 U-750 2-11-66P 42 U-800 2-11-66P 42 U-850 2-11-66P 42

U-900 2-ll-^6P 42 U-930 2-11-66P 42 U-970 7-9-70P 42

RM-1C E 67 RM-1R E 67 RM-100 E 67

GM-1 F(6-14-71) 68 GM-2 F(6-14-71) 68 GM-5 F 68

fiM-7007

F 68

rp-1

B 68

CP-2

B 68

CP-3

B 68

CP-4

B 68

CP-5

B 68

CP-6

B 68

84
OTHER NBS PUBLICATIONS IN THIS SERIES

NBS Spec. Publ. 260, Standard Reference Materials: 1973 Catalog, April 1973, $1.25.*

NBS Misc. Publ. 260-1, Standard Reference Materials: Preparation of NBS White Cast Iron

Spectrochemical Standards, June 1964. COM

74-11061.**

NBS Misc. Publ. 260-2, Standard Reference Materials: Preparation of NBS Copper-Base

Spectrochemical Standards, October 1964.

COM 74-11063.**

NBS Misc. Publ. 260-3, Standard Reference Materials: Metallographic Characterization of an NBS Spectrometric Low-Alloy Steel Standard, October 1964. COM 74-11060.**

NBS Misc. Publ. 260-4, Standard Reference Materials: Sources of Information on Standard

Reference Materials, February 1965. COM

74-11059.**

NBS Misc. Publ. 260-5, Standard Reference Materials: Accuracy of Solution X-Ray Spectrometric Analysis of Copper-Base Alloys,

March 1965. 25 cents. (Out of print).

NBS Misc. Publ. 260-6, Standard Reference Materials: Methods for the Chemical Analysis of

White Cast Iron Standards, July 1965. COM

74-11068.**

NBS Misc. Publ. 260-7, Standard Reference Materials: Methods for the Chemical Analysis of

NBS Copper-Base Spectrochemical Standards, October 1965. COM 74-11067.**

NBS Misc. Publ. 260-8, Standard Reference Materials: Analysis of Uranium Concentrates at the National Bureau of Standards, December

1965. COM 74-11066.**

NBS Misc. Publ. 260-9, 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, November

1965. COM 74-11065.**

NBS Misc. Publ. 260-10, Standard Reference

Materials: Homogeneity Characterization on NBS Spectrometric Standards II: Cartridge

Brass and Low-Alloy Steel, December 1965.

COM 74-11064.**

NBS Misc. Publ. 260-11, Standard Reference

Materials: Viscosity of a Standard Lead-Silica

Glass, November 1966. NBS Misc. Publ.

260-10.**

NBS Misc. Publ. 260-12, Standard Reference

Materials: Homogeneity Characterization of

NBS Spectrometric Standards III: White Cast

Iron and Stainless Steel Powder Compact,

September 1966. NBS Misc. Publ. 260-12.**

NBS Misc. Publ. 260-13, Standard Reference

Materials: Mossbauer Spectroscopy Standard

for the Chemical Shift of Iron Compounds.

July 1967. NBS Misc. Publ. 260-13.**

NBS Misc. Publ. 260-14, Standard Reference

Materials: Determination of Oxygen in Fer- rous Materials - SRM 1090, 1091, and 1092,

September 1966. NBS Misc. Publ. 260-14.**

NBS Misc. Publ. 260-15, Standard Reference

Materials: Recommended Method of Use of

Standard Light-Sensitive Paper for Calibrating Carbon Arcs Used in Testing Textiles for

Colorfastness to Light, June 1967. NBS Misc.

Publ. 260-15.**

NBS Spec. Publ. 260-16, Standard Reference

Materials: Homogeneity Characterization of

NBS Spectrometric Standards IV: Preparation and Microprobe Characterization of

W-20% Mo Alloy Fabricated by Powder

Metallurgical Methods, January 1969. COM

74-11062.**

NBS Spec. Publ. 260-17, Standard Reference

Materials: Boric Acid; Isotopic and Assay

Standard Reference Materials, February

1970. 65 cents.*

NBS Spec. Publ. 260-19, Standard Reference

Materials: Calibration of NBS Secondary

Standard Magnetic Tape (Computer Amplitude Reference) Using the Reference Tape

Amplitude Measurement "Process A",

November 1969. NBS Spec. Publ. 260-18.**

NBS Spec. Publ. 260-19, Standard Reference

Materials: Analysis of Interlaboratory Measurements on the Vapor Pressure of Gold

(Certification of Standard Reference Material

745), January 1970. PB 190071.**

85
NBS Spec. Publ. 260-21, Standard Reference

Materials: Analysis of Interlaboratory Measurements on the Vapor Pressures of Cadmium and Silver, January 1971. COM

74-11359.**

NBS Spec. Publ. 260-22, Standard Reference

Materials: Homogeneity Characterization of

Fe-3Si Alloy, February 1971. COM

74-11357**

NBS Spec. Publ. 260-23, Standard Reference

Materials: Viscosity of a Standard Borosili- cate Glass, December 1970. 25 cents.*

NBS Spec. Publ. 260-24, Standard Reference

Materials: Comparison of Redox Standards,

January 1972. $1.*

NBS Spec. Publ. 260-25, Standard Reference

Materials: A standard Reference Material

Containing Nominally Four Percent Austenite, February 1971. COM 74-11356**

NBS Spec. Publ. 260-26, Standard Reference

Materials: National Bureau of Standards-U.S.

Steel Corporation Joint Program for Determining Oxygen and Nitrogen in Steel, February 1971. 50 cents.*

NBS Spec. Publ. 260-27, Standard Reference

Materials: Uranium Isotopic Standard Refer-' ence Materials, April 1971. COM 74-11358**

NBS Spec. Publ. 260-28, Standard Reference

Materials: Preparation and Evaluation of

SRM's 481 and 482 Gold-Silver and GoldCopper Alloys for Microanalysis, August

1971. COM 71-50365.**

NBS Spec. Publ. 260-29, Standard Reference

Materials: Calibration of NBS Secondary

Standard Magnetic Tape (Computer Amplitude Reference) Using the Reference Tape

Amplitude Measurement "Process A-Model

2", June 1971. COM 71-50282.**

NBS Spec. Publ. 260-30, Standard Reference

Materials: Standard Samples Issued in the

USSR (A Translation from the Russian),

June 1971. COM 71-50283.**

NBS Spec. Publ. 260-31, Standard Reference

Materials: Thermal Conductivity of Electrolytic Iron SRM 734 from 4 to 300 K, November 1971. COM 71-50563.**

NBS Spec. Publ. 260-32. Standard Reference

Materials: Standard Quartz Cuvettes For

High Accuracy Spectrophotometry. December 1973. 55 cents.*

NBS Spec. Publ. 260-33, Standard Reference

Materials: Comparison of Original and Supplemental SRM 705, Narrow Molecular

Weight Distribution Polystyrene, H. L. Wagner, May 1972. COM 72-50526.**

NBS Spec. Publ. 260-34, Standard Reference

Materials: Thermoelectric Voltage, April

1972. COM 72-50371.**

NBS Spec. Publ. 260-35, Standard Reference

Materials: Thermal Conductivity of Austenitic Stainless Steel, SRM 735 from 5 to 280 K, April 1972. 35 cents.*

NBS Spec. Publ. 260-36, Standard Reference

Materials: A Referee Method for the Deter- mination of Calcium in Serum. SRM 915,

May 1972. COM 72-50527.**

NBS Spec. Publ. 260-37, Standard Reference

Materials: Methods of Analysis of NBS Clay

Standards, June 1972. COM 72-50692.**

NBS Spec. Publ. 260-38, Standard Reference

Materials: Preparation and Calibration of

Standards of Spectral Specular Reflectance,

May 1972. 60 cents.*

NBS Spec. Publ. 260-39, Standard Reference

Materials: The Eddy Current Decay Method

for Resistivity Characterization of HighPurity Metals, May 1972. 55 cents.*

NBS Spec. Publ. 260-40, Standard Reference

Materials: Selection of Thermal Analysis

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

1972. 65 cents.*

NBS Spec. Publ. 260-41, Standard Reference

Materials: Use of Standard Light-Sensitive

Paper for Calibrating Carbon Arcs used in

Testing Textiles for Colorfastness to Light,

August 1972. COM 72-50775.**

NBS Spec. Publ. 260-42, Standard Reference

Materials: The Characterization of Linear

Polyethylene. SRM 1475, September 1972.

45 cents.*

NBS Spec. Publ. 260-43, Standard Reference

Materials: Preparation and Homogeneity

Characterization of an Austenitic Iron- Chromium-Nickel Alloy, November 1972.

45 cents.*

NBS Spec. Publ. 260-44, Standard Reference

Materials: Preparation and Use of Superconductive Fixed Point Devices, SRM 767,

December 1972. 75 cents.*

86
NBS Spec. Publ. 260-45, Standard Reference

Materials: Powdered Lead-Based Paint, SRM

1579, March 1973. COM 73-50226.**

NBS Spec. Publ. 260-47, Standard Reference

Materials: Electrical Resistivity of Electrolytic Iron, SRM 797, and Austenitic Stainless

Steel, SRM 798, from 5 to 280K, February

1974. 55 cents.*

NBS Spec. Publ. 260-48, Standard Reference

Materials: Description and Use of Precision

Thermometers for the Clinical Laboratory,

SRM 933 and SRM 934, May 1974. 60

cents.*

NBS Spec. Publ. 260-49, Standard Reference

Materials: Calibrated Glass Standards for Fis- sion Track Use. (In preparation)

*Send order with remittance to: Superintendent of Documents, U.S. Government Printing Office,

Washington, D.C. 20402. Remittance from foreign countries should include an additional onefourth of the purchase price for postage.

**May be ordered from: National Technical Information Services (NTIS), Springfield, Virginia

22151.

87
NBS-114A (REV. 7-73)

U.S. DEPT. OF COMM. BIBLIOGRAPHIC DATA

SHEET

1. PUBLICATION OR REPORT NO. NTBS SP-260, 1975-76 Editio

2. Gov't Accession

No. n

3. Recipient's Accession No.

4. TITLE AND SUBTITLE

Catalog of NBS Standard Reference Materials

5. Publication Date June 1975

6. Performing Organization Code

7. AUTHOR(S)

R. W. Seward, Technical R epresentative

8. Performing Organ. Report No.

9. PERFORMING ORGANIZATION NAME AND ADDRESS

NATIONAL BUREAU OF STANDARDS

DEPARTMENT OF COMMERCE

WASHINGTON, D.C. 20234

10. Project/Task/Work Unit No. 3020585

11. Contract/Grant No.

12. Sponsoring Organization Name and Complete Address (Street, City, State, ZIP)

Same as Number 9.

13. Type of Report & Period Covered Interim

14. Sponsoring Agency Code

15. SUPPLEMENTARY NOTES

Supersedes NBS Special Publication 260, 1973 Edition

L brary of Congress Catalog Card Number: 75-1209

16. ABSTRACT (A 200-word or less factual summary of most significant information. If document includes a significant

bibliography or literature survey, mention it here.)

This Catalog lists and describes the Standard Reference Materials (SRM's),

Research Materials (RM's), and General Materials (GM's) currently distributed

by the National Bureau of Standards, as well as many of the materials currently

in preparation. SRM's are used to calibrate measurement systems and to provide

2 central basis for uniformity and accuracy of measurement. The unit and quantity,

the type, and the certified characterization are listed for each SRM, as well as directions for ordering. The RM's are not certified, but are issued to meet the needs

of scientists engaged in materials research. RM's are issued with a "Report of

Investigation',' the sole authority of which is the author of the report. The GM's are standardized by some agency other than NBS. NBS acts only as a distribution point

and does not participate in the standardization of these materials. Announcements

of new and renewal SRM's, RM's, and GM's are made in the semi-annual supplement

of this Catalog, 'RM Price List, and in scientific and trade journals.

17. KEY WORDS (six to twelve entries; alphabetical order; capitalize only the first letter of the first key word unless a proper name; separated by semicolons)

Analysis; characterization; composition; properties; Standard Reference Materials;

Research Materials; General Materials.

18. AVAILABILITY HT Unlimited

jX For Official Distribution. Do Not Release to NTIS

j^C^I Order From Sup. of Doc, U.S. Government PrJatine Ofiicc__ „ , . Washington. D.C. 20402. SD Cat. No. C13-1U: ZbU/19/5-fb ed.

| ! Order From National Technical Information Service (NTIS)

Springfield, Virginia 22151

19. SECURITY CLASS

(THIS REPORT)

UNCL ASSIFIED

21. NO. OF PAGES

92

20. SECURITY CLASS

(THIS PAGE)

UNCLASSIFIED

22. Price $1.50

U5COMM-DC 29042-P74
NBS TECHNICAL PUBLICATIONS

PERIODICALS JOURNAL OF RESEARCH reports National Bureau

of Standards research and development in physics,

mathematics, and chemistry. It is published in two sections, available separately:

• Physics and Chemistry (Section A)

Papers of interest primarily to scientists working in these fields. This section covers a broad range of physical and chemical research, with major emphasis on

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Studies and compilations designed mainly for the mathematician and theoretical physicist. Topics in mathematical statistics, theory of experiment design, numerical analysis, theoretical physics and chemistry, logical design and programming of computers and computer

systems. Short numerical tables. Issued quarterly. Annual subscription: Domestic, $9.00; Foreign, $11.25. DIMENSIONS/NBS (formerly Technical News Bulletin) —This monthly magazine is published to inform

scientists, engineers, businessmen, industry, teachers,

students, and consumers of the latest advances in science and technology, with primary emphasis on the work at NBS. The magazine highlights and reviews such

issues as energy research, fire protection, building tech- nology, metric conversion, pollution abatement, health and safety, and consumer product performance. In addition, it reports the results of Bureau programs in measurement standards and techniques, properties of matter and materials, engineering standards and services, instrumentation, and automatic data processing. Annual subscription: Domestic, $9.45; Foreign, $11.85.

NONPERIODICALS

Monographs—Major contributions to the technical liter- ature on various subjects related to the Bureau's scientific and technical activities. Handbooks—Recommended codes of engineering and

industrial practice (including safety codes) developed

in cooperation with interested industries, professional

organizations, and regulatory bodies.

Special Publications—Include proceedings of confer- ences sponsored by NBS, NBS annual reports, and other

special publications appropriate to this grouping such

as wall charts, pocket cards, and bibliographies.

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National Standard Reference Data Series—Provides

quantitative data on the physical and chemical properties of materials, compiled from the world's literature and critically evaluated. Developed under a world-wide

program coordinated by NBS. Program under authority

of National Standard Data Act (Public Law 90-396). NOTE: At present the principal publication outlet for these data is the Journal of Physical and Chemical

Reference Data (JPCRD) published quarterly for NBS

by the American Chemical Society (ACS) and the American Institute of Physics (AIP). Subscriptions, reprints, and supplements available from ACS, 1155 Sixteenth

St. N. W., Wash. D. C. 20056.

Building Science Series—Disseminates technical infor- mation developed at the Bureau on building materials, components, systems, and whole structures. The series presents research results, test methods, and performance criteria related to the structural and environmental functions and the durability and safety characteristics of building elements and systems.

Technical Notes—Studies or reports which are complete

in themselves but restrictive in their treatment of a

subject. Analogous to monographs but not so comprehensive in scope or definitive in treatment of the subject area. Often serve as a vehicle for final reports of work performed at NBS under the sponsorship of other government agencies.

Voluntary Product Standards—Developed under pro- cedures published by the Department of Commerce in Part 10, Title 15, of the Code of Federal Regulations. The purpose of the standards is to establish nationally

recognized requirements for products, and to provide

all concerned interests with a basis for common under- standing of the characteristics of the products. NBS

administers this program as a supplement to the activities of the private sector standardizing organizations. Federal Information Processing Standards Publications (FIPS PUBS)—Publications in this series collectively constitute the Federal Information Processing Standards Register. Register serves as the official source of information in the Federal Government regarding stand- ards issued by NBS pursuant to the Federal Property and Administrative Services Act of 1949 as amended,

Public Law 89-306 (79 Stat. 1127), and as implemented

by Executive Order 11717 (38 FR 12315, dated May 11, 1973) and Part 6 of Title 15 CFR (Code of Federal

Regulations). Consumer Information Series—Practical information, based on NBS research and experience, covering areas

of interest to the consumer. Easily . understandable language and illustrations provide useful background

knowledge for shopping in today's technological

marketplace.

NBS Interagency Reports (NBSIR) —A special series of interim or final reports on work performed by NBS for

outside sponsors (both government and non-government). In general, initial distribution is handled by the sponsor; public distribution is by the National Technical Information Service (Springfield, Va. 22161) in paper

copy or microfiche form.

Order NBS publications (except NBSIR's and Biblio- graphic Subscription Services) from: Superintendent of Documents, Government Printing Office, Washington,

D.C. 20402. BIBLIOGRAPHIC SUBSCRIPTION SERVICES

The following current-awareness and literature-survey

bibliographies are issued periodically by the Bureau:

Cryogenic Data Center Current Awareness Service A literature survey issued biweekly. Annual subscription: Domestic, $20.00; foreign, $25.00.

Liquefied Natural Gas. A literature survey issued quarterly. Annual subscription: $20.00. Superconducting Devices and Materials. A literature

survey issued quarterly. Annual subscription: $20.00. Send subscription orders and remittances for the pre- ceding bibliographic services to National Technical Information Service, Springfield, Va. 22161.

Electromagnetic Metrology Current Awareness Service Issued monthly. Annual subscription: $100.00 (Special rates for multi-subscriptions). Send subscription order and remittance to Electromagnetics Division, National Bureau of Standards, Boulder, Colo. 80302.
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