Source: https://ru.scribd.com/document/97407052/ABS-Rule-Requirement-for-Materials-and-Welding-2000
Timestamp: 2020-07-09 09:10:23
Document Index: 504464790

Matched Legal Cases: ['art 2', 'art 2', 'art 2', 'art 2', 'art 2', 'art 2', 'art 2']

ABS - Rule Requirement for Materials and Welding 2000 | Pipe (Fluid Conveyance) | Boiler
сохранитьСохранить «ABS - Rule Requirement for Materials and Welding 2...» для последующего чтения
Rule Requirements for
MaterialsMaterialsMaterialsMaterials andandandand WeldingWeldingWeldingWelding
Supplementary Requirements for Naval Vessels
Incorporated by Act of the Legislature of The State of New York, 1862
Copyright  2000 American Bureau of Shipping ABS Plaza 16855 Northchase Drive Houston, TX 77060 USA
Rule Requirements for Materials and Welding
Materials for Hull Construction
Materials for Machinery, Boilers, Pressure
ABS RULE REQUIREMENTS FOR MATERIALS AND WELDING 2000
Cleaning Procedures for Class P Material
Coatings for Class P Material
Color of Coatings for Class P Material
Cold Cracking Susceptibility
Aluminum/Steel Bimetallic Transition Joints
Supplementary Requirements for Naval Ships
General 2-11-1
2-11-1/1
When so ordered and agreed to by the Bureau, ABS Grade hull structural steel produced, tested, inspected and certified in accordance with Part 2, Chapter 1, of the Rules is to comply with the supplemental requirements in this Chapter. However, the responsibility for compliance with these supplemental requirements lies with the steel manufacturer.
Commercially Available Anticorrosive Coating
Preservation, Packaging, Packing and Marking 2-11-1
2-1-1/1.1
When requested by the purchaser, structural plates, shapes and bars are to be cleaned and coated in accordance with the following requirements, and are to be preserved, packaged, packed, and marked in accordance with ASTM A700. Material so cleaned and coated is considered as Class P material for the purposes of ordering; no marking indicating Class P need be affixed or stamped. The conformance to the requirements is a matter of agreement between the manufacturer and the purchaser.
References 2-1-1/1.3
The following documents form a part of these supplementary requirements to the extent specified herein. Unless otherwise specified, the issue of the document is to be that listed in the Department of Defense Index of Specifications and Standards (DoDISS) and supplements thereto, cited in the solicitation. Unless otherwise specified, the issue of documents not listed in the DoDISS is to be the issue of the nongovernment documents which is current on the date of the solicitation. Copies of Government documents required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting activity.
Federal Standard 2-A4/3.3.1
Fed-STD-595 – Colors
Federal Specifications 2-A4/3.3.2
TT-P-645B – Primer, Paint, Zinc Molybdate, Alkyd Type
TT-P-664D – Primer Compliant
Corrosion-Inhibiting,
American Society for Testing and Materials (ASTM) 2-A4/3.3.3
A700 – Standard Practices for Packaging, Marking, and Loading Methods for Steel Products for Domestic Shipment
Supplementary Requirements for Naval Vessels Materials for Hull Construction Preservation, Packaging, Packing and Marking
3.7 Steel Structures Painting Council (SSPC) 2-A4/3.3.4
SP 6 – Commercial Blast Cleaning
Cleaning Procedures for Class P Material 2-A4/3.5
Descaling 2-A4/3.5.1
The steel material, as prepared for coating, is to be in the descaled and cleaned condition and free of visible rust. Material is to be descaled by abrasive blast cleaning or acid pickling.
Abrasive Blast Cleaning 2-A4/3.5.2
Abrasive blast cleaning is to result in a clean metal surface, suitable for painting, equivalent to a commercial blast cleaning, SSPC SP 6.
Acid Pickling 2-A4/3.5.3
The acid pickling process is to be as follows:
5.5.1 Position Material is to be tilted on edge throughout the steps of the procedure. Shapes are not to be positioned as to have a lower surface horizontal in the solution.
5.5.2 Pre-Pickling Rust preventives, oils, greases, oil paints and other foreign matter are to be removed from the steel prior to pickling.
5.5.3 Bath Conditions The pickling bath is to consist of sulfuric acid solution to which has been added a pickling inhibitor and 1.5 percent of sodium chloride. In making the solution initially, 20 liters (5 gallons) of concentrated sulfuric acid are to be used for each 400 liters (100 gallons) of solution. The acid concentration is not to be allowed to drop below 3.5 percent by volume. The inhibitor is to be used at the concentration recommended by the manufacturer. The bath temperature is to be maintained between 77C (170F) and 82C (180F). When the concentration of iron in the solution reaches 5 percent by weight, the entire bath is to be discarded.
5.5.4 Water Rinse The steel is to be thoroughly rinsed with water after pickling. The water rinse is to consist of fresh circulating water maintained at a temperature of 77C (170F) to 82C (180F). The flow of fresh water is to be maintained so that a complete change of water occurs at least once every 24 hours. The combined concentrations of sulfuric acid and iron sulfate in the bath, calculated from the acid concentration and the ferrous iron concentration, are not to exceed 0.5 g/liter (2 grams per gallon). This determination is to be made at least once each week.
7 Coatings for Class P Material 2-A4/3.7
Class P material is to be coated in accordance with any one of the following.
TT-P-645B 2-A4/3.7.1
One coat of 0.05 mm (2.0 mils) dry film thickness, appropriately tinted. The VOC is not to exceed 340 g/l.
TT-P-664D 2-A4/3.7.2
One coat of 0.05 mm (2.0 mil) dry film thickness, appropriately tinted. The VOC is not to exceed 420 g/l.
Commercially Available Anticorrosive Coating 2-A4/3.7.3
One coat of 0.05 mm (2.0 mils) dry film thickness, of an appropriately tinted, commercially available lead and chromate free anticorrosive coating demonstrated to provide corrosion protection equivalent to the coatings in 2-11-2/7.1 or 2-11-2/7.3. Lead and chromate free is defined as 50 ppm maximum in the dry paint film. The VOC is not to exceed 420 g/l. The selection and use of a commercially available anticorrosive coating is to be agreed by the steel manufacturer and the purchaser.
9 Color of Coatings for Class P Material 2-A4/3.9
The color of coatings for Class P material is to be in accordance with the following.
Ordinary Strength Steel 2-A4/3.9.1
The color is to be a clear yellow, approximating color No. 33481 (yellow) in accordance with FED- STD-595, by removing the lampblack.
Higher Strength Steel 2-A4/3.9.2
The color is to be a dark green, approximating color No. 34128 (dark green) in accordance with FED- STD-595, by adding sufficient and insoluble inorganic pigments.
11 Drying and Protection 2-A4/3.11
11.1 Drying Time 2-A4/3.11.1
The drying time at 23C (73F) for the coating specified in 2-11-2/7 is to be as follows:
Drying Time (max)
Formula 84D
6 hours 10 minutes (touch)
TT- P-664D
45 minutes (handling)
As agreed by manufacturer and purchaser
Higher temperatures may be used to shorten drying time.
11.3 Length of Protection 2-A4/3.11.2
The coatings specified in 2-11-2/7 are to be selected for the desired length of protection. Protection for approximately 9 months should be provided by cleaning, followed by:
i) one coat of alkyd zinc-molybdate primer, in accordance with TT-P-645B, or
ii) one coat of alkyd primer, in accordance with TT-P-664D, or
iii) one coat of commercially available anticorrosive primer (see 2-11-2/7.5)
Special Specifications 2-11-1
When the application of the material is intended to be hull structural steel on US military surface ships, the following paragraphs are to be used in requesting additions to the requirements in Part 2, Chapter 1.
Cold Cracking Susceptibility 2-A4/5.3
Grades AH36, DH36 and EH36 up to 45 mm (1 3 / 4 in.) in thickness are to have a cold cracking susceptibility (P cm ) less than 0.27% as determined by the following equation.
P cm = C +
+ 5Β %
Impact Testing 2-A4/5.5
Charpy V-notch impact tests may be waived for the higher-strength material equivalent to Grade AH36, 12.5 mm ( 1 / 2 in.) and less in thickness.
ABS Grades shown in 2-11-4/Table 1 and 2-11-4/Table 2 supersede the indicated US military specification material grades.
TABLE 1 Superseded Plate Specifications
Rule Steel Grade
MIL-S-22698C
MIL-S-22698A
Grade DH36*
Grade HT-type I
Grade EH36U*
Grade EH36T
Grade HT-type II
Grade QT (1)
1 MIL-S-24113, Grade QT is no longer used. Supersession is by ASTM A537, Class 2 with a Charpy requirement of 40J (4.1 kg- m, 30 ft-lb) at minus 23C (minus 10F).
* For additional Requirements, See 2-11-3/3.
TABLE 2 Superseded Bar and Shape Specifications
MIL-S-20166
Grades C, F and M
Grade AH36*
Grade AH36U*
Grade AH36T
* For additional Requirements, see 2-11-3/3 and 2-11-3/5.
Substitute Material 2-11-1
Where agreed between the purchaser and the material manufacturer, the material listed in 2-11-5/Table 1 and 2-11-5/Table 2 may be accepted for US military surface ships in lieu of the ABS grades shown provided the additional requirements are complied with. In all cases, the steel is to be produced by an approved steel mill. No other substitutions are to be considered for hull structural steel intended for US military surface ships.
TABLE 1 Substitutes for Plates, Shapes and Bars
Additional Requirements (1)(2)
ASTM A29, Grades 1015 through 1022
ASTM A131, Grade B
Si 0.15–0.35%
ASTM A576, Grades 1015 through 1022
ASTM A131, Grade AH36
ASTM A322, Class 8620
Fine Grain Practice, and Normalized
ASTM A588, Grades A or B
ASTM A131, Grade DH36
ASTM A131, Grade EH36
1 The Surveyor is to verify the test data in all cases.
2 The mechanical properties of the substitute are to meet the Rule requirement for the supplanted grade.
3 The steel mill producing the substitute material must be approved to produce the supplanted grade in accordance with 2-1-2/3 or 2-1-3/3 as appropriate.
TABLE 2 Substitutes for Bars for Reforging
ASTM A541, Class 4
Axial Fatigue Strength Test
Welded Tensile Test
Sampling Lots
Fatigue Test Conditions and Requirements
Ram Tensile Test Setup
Ram Tensile Specimen
Weld Tensile Test Assembly
Aluminum/Steel Bimetallic Transition Joints 2-11-1
The following specification covers metallurgically bonded bimetallic transition joints intended for structural connections between aluminum and steel in an atmospheric or dry environment. When the end use is for a U.S. Naval Ship, these transition joints are to be produced in accordance with the aluminum requirements in Part 2, Section 4 (1997 Edition of Part 2 “Requirements for Materials and Welding – Aluminum, Fiber Reinforced Plastics (FRP)”) and the steel requirements in Part 2, Chapter 1, together with the modifying requirements in 2-11-6/3. (Note: These supplementary requirements are intended to replace MIL-J-24445A).
Aluminum/steel bimetallic transition joints are to be produced, tested, inspected and certified in accordance the following supplementary requirements.
The following documents of the issue in effect on the date of the material purchase form a part of this specification to the extent referenced herein.
Fabrication, Welding, and Inspection of Ship Structures
Technical Publication T9074-AS-GIB-010/271, Nondestructive Testing Requirements for Metals
The bimetallic bond may be produced by explosion-bonding or by roll-bonding. In both cases, the material is to be produced in the form of plate, which will subsequently be cut into bar-like transition joints. Aluminum alloys in accordance with Part 2, Section 4 (1997 Edition of Booklet 2) and the steels in accordance with Part 2, Chapter 1, are considered suitable for use as transition joint material. The use of an intermediate aluminum material at the bond interface is permitted.
Supplementary Requirements for Naval Vessels Materials for Hull Construction Aluminum/Steel Bimetallic Transition Joints
The ultimate tensile strength of the bond zone is to be determined by means of the ram tensile test described in 2-11-6/Figure 1. Test specimens machined to the dimensions in 2-11-6/Figure 2 are to be loaded in tension to failure. The minimum tensile strength is 75 N/mm 2 (8 kgf/mm 2 , 11 ksi). Tests are to be made in the as-clad condition, and in the simulated welded condition.
3.5.1 As-Clad Test No preliminary treatment is to be given to the specimens which are to represent the as-clad product. The testing is to be carried out at room temperature.
3.5.2 Simulated Welded Test A preliminary heat treatment is to be given to the specimens which are to represent the
product after welding. The test specimen is to be heat treated at 315C ± 14C (600F ± 25F) for
minutes. The testing is to be carried out at room temperature.
The integrity of the bond zone is to be evaluated by means of a full thickness guided bend test. Two bend specimens, see 2-4-3/Figure 5, are to be machined with the bond line transverse to the specimen longitudinal axis and at the approximate mid-length. The specimens are to be bent over ninety degrees to a radius of three times the thickness of the specimen. Openings at the bond line that are visible to the unaided eye and larger in size than 3.2 mm ( 1 / 8 in) are cause for rejection. The total length of permissible openings is not to exceed twenty percent of the bond length tested.
The ultimate shear strength of the bond zone is to be determined by means of the methods for the shear strength test in Figure 1 of ASTM A264, for Stainless Chromium-Nickel Steel-Clad Plate, Sheet, and Strip. Test specimens are to be loaded in shear to failure. The minimum shear strength is
55 N/mm 2 (6 kgf/mm 2 , 8 ksi). welded condition.
Tests are to be made in the as-clad condition, and in the simulated
3.9.1 As-Clad Test No preliminary treatment is to be given to the specimens which are to represent the as-clad product. The testing is to be carried out at room temperature.
3.9.2 Simulated Welded Test A preliminary heat treatment is to be given to the specimens which are to represent the
The axial fatigue strength of the welded transition joint is to be determined by means of specimens in 2-11-6/Figure 3, and is to meet the minimum specified loadings and endurance without decohesion at the bond line. The testing is to be repeated if the base metal fails before the specified number of cycles.
TABLE 1 Fatigue Test Conditions and Requirements
Tension Stress, in N/mm 2 (kgf/mm 2 , ksi)
Compressive Stress, in N/mm 2 (kgf/mm 2 , ksi)
7 (0.7, 1)
70 (7, 10)
The axial tensile strength of the welded transition joint is to be determined by means of specimens in 2-11-6/Figure 3. The results are considered satisfactory provided the failure load is above that calculated for one of the web members based on the specified minimum tensile strength of the web material.
The bond zone is to be examined by means of ultrasonic inspection in accordance with NAVSEA
Technical Publication T9074-AS-GIB-010/271 to detect areas that lack a bond. Each bimetallic bond
to be continuously scanned. Complete loss of back reflection resulting from a discontinuity at the
bond interface is cause for rejection.
The transition joint flatness, edge straightness and edge chamfer are to comply with the following.
3.17.1 Flatness The joints are to be flat to within 1.6 mm (0.062 in) over any 305 mm (12 in). The overall flatness is to be within 25.4 mm (1.0 in) for joints over 2.5 m (8 ft) in length, and 19.1 mm (0.75 in) for shorter joints.
3.17.2 Edge Straightness The joints are to be straight at the edge to within 3.2 mm (0.375 in) over any 305 mm (12 in). The overall straightness is to be within 12.5 mm (0.50 in).
3.17.3 Edge Chamfer The joint edges are to be chamfered to a minimum radius of 1.6 mm (0.062 in).
squareness is to be within 0.8 mm (0.031 in) for cut ends, and 1.6 mm (0.062 in) for cut
A test lot consists of not more than ten (10) bimetallic bonded plates produced at one time and with
the same set of manufacturing parameters. Changes to the manufacturing parameters listed below constitute a different lot.
3.19.1 Common Parameters Manufacturing parameters common to both explosion-bonding and to roll-bonding are: alloy heat, plate thicknesses, base metal pre-cleaning, bonding agents, and assembly width and length.
3.19.2 Explosion-Bonding Parameters Manufacturing parameters for explosion-bonding are: charge size, standoff distance, charge type, and process sequencing.
3-19-3 Roll-Bonding Parameters Manufacturing parameters for roll-bonding are: roll pressure, roll temperature, and number of passes.
One bonded plate from each lot is to be sampled for mechanical testing. The selected plate is to be sampled at diagonally opposite corners. Each sample is to be used for tensile strength testing, and bend testing. All plates are to 100% ultrasonically inspected, 2-11-6/3.15. All transition joints are to be dimensionally inspected, 2-11-6/3.17.
TABLE 2 Production Lot Testing
2-11-6/3.5
As clad
Simulated welded
2-11-6/3.7
Rejected lots may be reconsidered on a plate-by-plate basis provided two tensile tests and two bend tests are carried out with satisfactory results. A plate with any mechanical test failure is not to be reconsidered for acceptance.
In accordance with 2-1-2/3, a first article inspection is to be carried out for each type of bimetallic joint to validate the bond zone properties and the manufacturing process. All bonding practices are to be recorded and to serve as a base-line for production. Where production practices are modified from the baseline, first article inspection may be required. First article testing is to include ultrasonic inspection, 2-11-6/3.15, and the following production tests and special tests:
TABLE 3 First Article Testing
2-11-6/3.9
Axial Fatigue Strength
2-11-6/3.11
Welded Tensile
2-11-6/3.13
4 If the specimen contains three lugs for testing, then one specimen may be used. In this case, each lug is to be tested individually and the specimen suitably cleaned of testing damage so as to not influence testing and results of the subsequent lug.
Procurement documents are to list the following items with appropriate requirements specified:
1 Specify title and number of ABS specification.
2 Specify ABS designation and UNS alloy number of bimetallic materials.
3 Specify ASTM specification, if applicable.
4 Specify dimensions or reference a drawing number.
5 Specify ABS certification, if required.
6 Specify special product marking, if required.
7 Specify first article inspection, 2-11-6/3.25, if required.
This specification supersedes MIL-J-24445A in entirety.
FIGURE 1 Ram Tensile Test Setup
FIGURE 2 Ram Tensile Specimen
1 Sketch dimensions may be appropriately scaled for testing product less than 33 mm (1 5 / 16 in) in width.
2 The hole depth, D, below the bond line is to be 1.62 mm (0.064 in) or greater in all cases.
FIGURE 3 Weld Tensile Test Assembly
1 The web members are to be of the same composition and thickness as those which are to be used for the service application.
2 The width of the transition joint is to be the same as the product furnished to the purchaser.
3 The welding filler material is to be chosen in accordance with the requirements of MIL-STD-1689. The test assembly is to be cut from the approximate center of the welded assembly and is to be a minimum of 50 mm (2 in) in length. The welded assembly is to incorporate the necessary load tabs.
Materials for Machinery, Boilers, Pressure Vessels and Piping
Steel Machinery Forgings
Carbon Steel Machinery Forgings
General Shipboard Alloy Steel Forgings
Nickel-Aluminum Bronze Castings
SECTION 16 Seamless Copper Piping
SECTION 18 Seamless Copper Tubes
SECTION 19 Condenser and Heat Exchanger Tubes
SECTION 20 Copper-Nickel Tubes and Pipes
SECTION 21 Monel Tubes and Pipes
Copper-Nickel Flats and Sections
APPENDIX 1 Guide for Impregnation of Castings and Powder Metal Parts
Casting Impregnation Process
Impregnants for Castings and Powder Metal Components
Supercession of Military Documents
APPENDIX 1 Guide for Impregnation of Castings and Powder Metal Parts Annex A – Reactivity of Class 1a Impregnating Material
Minimum Permissible Hardness
Class of Ordering Data
The following specifications cover four grades of steel tube designated H, J, K and P, and also cover two grades of austenitic stainless steel designated R and S. When the end use is for a U.S. Naval Ship, ABS grades of steel tube are to be produced in accordance with the requirements in Section 2-3-5 together with the modifying requirements in 2-13-5/3. (Note: These supplementary requirements are intended to replace MIL-T-16286.)
Steel tube is to be produced, tested, inspected and certified in accordance with ASTM A192, ASTM A209, ASTM A210, ASTM A213 and ASTM A450, including section 30 (Government Procurement) as modified by Section 2-3-5 and the following supplementary requirements.
The following documents of the issue in effect on the date of the solicitation form a part of this specification to the extent referenced herein.
Standard Specification for Seamless Carbon Steel Boiler Tubes for High- Pressure Service
Standard Specification for Medium-Carbon Steel Boiler and Superheater Tubes
Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steel
Standard Specification for General Requirements for Carbon Ferritic Alloy and Austenitic Alloy Steel Tubes
Supplementary Requirements for Naval Vessels Materials for Machinery, Boilers, Pressure Vessels and Piping Boiler and Superheater Tubes
Grades H, K, and J are intended for the following specified uses.
3.3.1 Grade H Tubes Grade H tubes are intended for use as water tubes in steam generators operating at a steam pressure not to exceed 51.5 bar (5.17MPa, 750 psi).
3.3.2 Grade K Tubes Grade K tubes are intended for use as water tubes in steam generators only when approved by the procuring activity.
3.3.3 Grade J Tubes Grade J tubes are intended for use as water tubes in steam generators.
Hot finished grade H and J tubes are to be heat treated at a temperature of 650C (1200F) or higher. Grade R and S tubes are to be solution annealed at a minimum of 1100C (2000F) and then quenched in water or rapidly cooled by other means, followed by a stabilization anneal at 815C to 900C (1500F to 1650F).
All tubes in all lots are to be hydrostatic tested in accordance with test requirements in 2-3-5/31. The nondestructive electric test in 2-3-5/33 is not to be substituted.
Eddy-current testing may be substituted for ultrasonic testing for all tubing having a specified wall thickness of 3.0 mm (0.120) inches or less.
One specimen from each of two tubes from each lot of grades R and S is to be prepared and tested in accordance with ASTM A262 Practice E without the use of the rapid screening test. A lot is all tubes of same size and from the same heat which are heat treated in the same furnace charge, when heat treated in a batch-type furnace or all tubes of the same size and heat, heat treated in the same furnace at the same temperature, time at heat, furnace speed during an 8 hour period, when heat treated in a continuous furnace. The entire lot is to be rejected if the test results for either specimen show the presence of precipitated carbides
Tube that has hardness values less than the following is to be tensile tested.
Tubes 1.65 mm (0.065 in.) and over in wall thickness
2 Specify ABS grade.
3 Specify applicable ASTM specification and ASTM grade.
4 Specify minimum wall thickness, length and outside diameter required and, if required, any additional dimensional tolerance or out of roundness requirements.
5 Specify levels of preservation, packaging and packing required and applicable specifications and standards.
6 Specify marking for shipment.
7 Specify ultrasonic testing is required for all tubing per ASTM A450 section 30.
8 Specify if ABS certification is required.
9 Specify additional data certification requirements, if any.
10 Specify if chemical check analysis is required for grades H or J.
This ordering data has been classified to establish the minimum requirements for different applications. Class 1 requirements and ordering data are to be specified on every order unless specifically excluded in the contract or drawing. Class 2 requirements and ordering data are not required unless specifically required by the contract or drawing.
Items 1 to 7 in 2-13-5/3.15 are Class 1.
Items 8 and 10 in 2-13-5/3.15 are Class 2.
The ABS grades shown below supersede the indicated specification grades.
ASTM Steel Tube Specification and Grade
MIL-T-16286D
A210 Grade A-1
A209 Grade T1
A213 Grade TP321
A213 Grade TP347
Charpy V-notch Impact Properties
Carbon Steel Machinery Forgings 2-1-1/1.1
The following specification covers two grades of carbon steel forgings, designated 2, and 4C. When the end use is for a U.S. Naval Ship, ABS grades of carbon steel forgings are to be produced in accordance with the requirements in 2-3-7/1 together with the modifying requirements in 2-13-7/1.3 (Note: These supplementary requirements are intended to replace MIL-S-24093A (SH).)
Alloy steel forgings are to be produced, tested, inspected and certified in accordance with ASTM A668 and A788 as modified by 2-3-7/1 and the following supplementary requirements. Requirements in 2-3-7/1 that are different than the ASTM requirements are listed for reference:
2-3-7/1.1.1
2-3-7/1.3.1
2-3-7/1.7
2-3-7/1.9
2-3-7/1.11
1.3.1 Reference Documents The following documents of the issue in effect on the date of the material purchase form a part of this specification to the extent referenced herein:
Supplementary Requirements for Naval Vessels Materials for Machinery, Boilers, Pressure Vessels and Piping Steel Machinery Forgings
1.3.2 Manufacture 1.3.2(a) Steel Making When specified, the primary melting (including vacuum induction melting) may incorporate separate degassing or refining and may be followed by secondary melting using electroslag remelting (ESR), or vacuum arc remelting (VAR).
1.3.2(b) Bored Ingots The centerline hole of bored ingots is to include the centerline of the ingot. The wall thickness of a bored ingot is to be reduced to at least 50% during forging, or alternatively, the reduction of area is to be not less than 3:1.
1.3.2(c) Heat Treatment Grade 4C forging may be quenched and tempered. For all tempering heat treatments to all grades, the tempering temperature is not to be less than 565C (1050F). A stress relief may be applied after final machining. In this case, the stress relief temperature is to be at least 28C (50F) below that of the tempering temperature.
1.3.2(d) Thermal Cutting No thermal cutting is permitted after final heat treatment and inspection of the forging.
1.3.2(e) Hot Rolled Bars Unless otherwise specified, hot rolled bars may not be used in lieu of forgings; bar shapes are to be forged and furnished in the normalized and tempered condition.
1.3.3 Chemical Composition An analysis of each heat (ladle analysis), and an analysis of each forging (product analysis) or lot are to be made to determine the percentages of the elements specified. The chemical composition thus determined is to conform to the requirements for the grade shown.
TABLE 1 Chemical Composition (1) , in percent
Single values are maxima, unless noted.
1.3.4 Tension Properties
All forgings are to have a maximum tensile strength of 620 N/mm 2 (63 kgf/mm 2 , 90 ksi). Grade 4C forgings are to have a minimum yield strength of 310 N/mm 2 (32 kgf/mm 2 , 45 ksi). For determining the number of tension tests, the size demarcation between a small forging and an intermediate-sized forging is 455 kg (1000 lb).
1.3.5 Hardness Properties Hardness properties are not required to be determined.
1.3.6 Impact Properties When specified, a Charpy V-notch impact test is to be carried out in accordance with ASTM A370 for each forging which is tension tested. Longitudinal specimens are to be removed at least one inch below the surface from the top prolongation and machined with the notch perpendicular to the surface in accordance with 2-1-1/Figure 2. The material is to meet the following requirements:
TABLE 2 Charpy V-notch Impact Properties (1)
Absorbed Energy, in J (kgf-m, ft-lbs)
(2.0, 15)
1 Test temperature is -12C (10F).
1.3.7 Inspection Each forging is to be magnetic particle inspected in accordance with S18 of ASTM A788.
1.3.8 Ultrasonic Inspection When specified, each forging is to be ultrasonically examined in accordance with NAVSEA Technical Publication T9074-AS-GIB-010/271, Nondestructive Testing Requirements for Metals, using axial and radial scanning. The presence of indications in excess of the calibration standard is cause for rejection of the forging.
1.3.9 Marking Additional marking is to include the heat number, the forging number, and the heat treatment lot number. Forgings weighing more than 113 kg (250 lb) are also to be marked with the drawing number or die number.
1.3.10 Part Numbers Information for part numbers in MIL-S-24093/2 is found in the cancellation notice.
1.3.11 Ordering Data Procurement documents are to list the following items with appropriate requirements specified:
2 Specify ABS grade, 2-13-7/1.1.
3 Specify ASTM specification and class.
4 Specify a special melting practice, 2-13-7/1.3.2(a), if required.
5 Specify whether continuous casting is prohibited.
6 Specify virgin raw materials, if required.
7 Specify heat treatment, 2-13-7/1.3.2(c).
8 Specify transverse tension test, if required.
9 Specify form, dimensions, and tolerances or reference drawing number.
10 Specify level of preservation, packaging and packing required and applicable specifications and standards, if required.
11 Specify ABS certification, if required.
12 Specify Charpy V-notch impact testing, 2-13-7/1.3.6, if required.
13 Specify ultrasonic testing, 2-13-7/1.3.8, if required.
14 Specify alternative ultrasonic testing acceptance criteria, 2-13-7/1.3.8, if required.
1.3.12 Class of Ordering Data This ordering data has been classified to establish the minimum requirements for different applications. Class 1 requirements and ordering data are to be specified on every order unless specifically excluded in the contract or drawing. Class 2 requirements and ordering data are not required unless specifically required by the contract or drawing.
Items 1 to 10 in 2-13-7/1.3.11 are Class 1.
Items 11 to 14 in 2-13-7/1.3.11 are Class 2.
1.3.13 Superseded Specifications The ABS grades shown below supersede the indicated specification grades.
ABS Rule Grades
MIL-S-24093A(SH) Class
A668 Class B
A668 Class E
The following specification covers five grades of 255 mm (10 in) or smaller alloy steel forgings, designated A11, A12, A13, A14, and A15. The five grades may be produced to chemical composition requirements designated by a grade-suffix, A, B, and C, as indicated. When the end use is for a U.S. Naval Ship, ABS grades of alloy steel forgings are to be produced in accordance with the requirements in 2-3-7/7 together with the modifying requirements in 2-13-7/7 (Note: These supplementary requirements are intended to replace MIL-S-24093A (SH).)
Alloy steel forgings are to be produced, tested, inspected and certified in accordance with ASTM A668 and A788 as modified by 2-3-7/7 and the following supplementary requirements. Requirements in 2-3-7/7 that are different than the ASTM requirements are listed for reference:
2-3-7/7.1.1
2-3-7/7.3.1
2-3-7/7.7.1
2-3-7/7.9
2-3-7/7.11
7.3.1 Reference Documents The following documents, of the issue in effect on the date of the material purchase, form a part of this specification to the extent referenced herein:
7.3.2 Manufacture 7.3.2(a) Steel Making When specified, the primary melting (including vacuum induction melting) may incorporate separate degassing or refining and may be followed by secondary melting using electroslag remelting (ESR), or vacuum arc remelting (VAR).
7.3.2(b) Bored Ingots The centerline hole of bored ingots is to include the centerline of the ingot. The wall thickness of a bored ingot is to be reduced to at least 50% during forging, or alternatively, the reduction of area is to be not less than 3:1.
7.3.2(c) Heat Treatment All forging grades may be normalized and tempered. The tempering temperature is not to be less than the following. A stress relief may be applied after final machining. In this case, the stress relief temperature is to be at least 28C (50F) below that of the tempering temperature.
TABLE 3 Tempering Temperature
Temperature, in C (F)
7.3.2(d) Thermal Cutting No thermal cutting is permitted after final heat treatment and inspection of the forging.
7.3.2(e) Hot Rolled Bars Hot roll processing may be used in lieu of forging for grade A14 bars not more than 50 mm (2 in) in size and heat treated to a normalized and tempered condition.
7.3.3 Chemical Composition An analysis of each heat (ladle analysis), and an analysis of each forging (product analysis) or lot are to be made to determine the percentages of the elements specified. The chemical composition thus determined is to conform to the requirements for one of the following grade-suffix; ie A, B, or C. The permissible combinations of forging strength and chemical composition are represented by the grade-suffix as follows: A11A, A11B, A11C, A12A, A12B, A12C, A13A, A13B, A14A, A14B, and A15A.
TABLE 4 Chemical Composition (1) , in percent
Grade AXXA
Grade AXXB
Grade AXXC
1 Single values are maxima, unless noted.
7.3.4 Tension Properties The tension properties for forgings of any size, cross-section and critical thickness are to comply with the tension properties required for forgings of size less than 100 mm (4 in). For determining the number of tension tests, the size demarcation between a small forging and an intermediate-sized forging is 455 kg (1000 lb).
7.3.5 Hardness Properties Hardness properties are not required to be determined.
7.3.6 Impact Properties When specified, a Charpy V-notch impact test is to be carried out in accordance with ASTM A370 for each forging which is tension tested. Longitudinal specimens are to be removed at least one inch below the surface from the top prolongation and machined with the notch perpendicular to the surface in accordance with 2-1-1/Figure 2. The material is to meet the following requirements:
TABLE 5 Charpy V-notch Impact Properties (1)
7.3.7 Inspection Each forging is to be magnetic particle inspected in accordance with S18 of ASTM A788.
7.3.8 Ultrasonic Inspection When specified, each forging is to be ultrasonically examined in accordance with NAVSEA Technical Publication T9074-AS-GIB-010/271, Nondestructive Testing Requirements for Metals, using axial and radial scanning. The presence of indications in excess of the calibration standard is cause for rejection of the forging.
7.3.9 Marking Additional marking is to include the grade-suffix, the heat number, the forging number, and the heat treatment lot number. Forgings weighing more than 113 kg (250 lb) are also to be marked with the drawing number or die number.
7.3.10 Part Numbers Information for part numbers in MIL-S-24093/1 and MIL-S-24093/3 is found in the cancellation notice.
7.3.11 Ordering Data Procurement documents are to list the following items with appropriate requirements specified:
2 Specify ABS grade and suffix, 2-13-7/7.3.3.
4 Specify a special melting practice, 2-13-7/7.3.2(a), if required.
7 Specify heat treatment, 2-13-7/7.3.2(c).
12 Specify Charpy V-notch impact testing, 2-13-7/7.3.6, if required.
13 Specify ultrasonic testing, 2-13-7/7.3.8, if required.
14 Specify alternative ultrasonic testing acceptance criteria, 2-13-7/7.3.8, if required.
7.3.12 Class of Ordering Data This ordering data has been classified to establish the minimum requirements for different applications. Class 1 requirements and ordering data are to be specified on every order unless specifically excluded in the contract or drawing. Class 2 requirements and ordering data are not required unless specifically required by the contract or drawing.
Items 1 to 10 in 2-13-7/7.3.11 are Class 1.
Items 11 to 14 in 2-13-7/7.3.11 are Class 2.
7.3.13 Superseded Specifications The ABS grades shown below supersede the indicated specification grades.
A668 Class J
A668 Class K
A668 Class M
A668 Class N
ABS Rule Grade-Suffix
MIL-S-24093A(SH) Type
Sampling for Flattening and Flaring Test and for Visual and Dimensional Examination
Steel Piping 2-11-1
The following specifications cover five grades of steel pipe designated 4, 5, 11, 13, and 14, and ten grades of austenitic stainless steel. When the end use is for a U.S. Naval Ship, ABS grades of steel pipe are to be produced in accordance with the requirements in Section 2-3-12 together with the modifying requirements in 2-13-12/3. (Note: These supplementary requirements are intended to replace MIL-P-24691, MIL-P-24691/1, MIL-P-24691/2, and MIL-P-24691/3.)
Steel pipe is to be produced, tested, inspected and certified in accordance with ASTM A106, ASTM A312, ASTM A335 and ASTM A530, including section 26 (Government Procurement) as modified by Section 2-3-12 and the following supplementary requirements. Austenitic stainless steel pipe is to comply with the following supplementary requirements
3.1 Referenced Documents 2-A4/3.3.1
NAVSEA Technical Publication S9074-AR-GIB-010/278, Requirements for Fabrication welding and Inspection and Casting Inspection and Repair for Machinery, Piping and Pressure Vessels
Supplementary Requirements for Naval Vessels Materials for Machinery, Boilers, Pressure Vessels and Piping Steel Piping
Tube 2-A4/3.3.2
Section 2-3-12 does not cover tubing. The ASTM specifications listed below together with 2-13-12/3.9 Ordering Data requirements are to be used.
M24691/1
M24691/2
M24691/3*
* see 2-13-12/3.13
Sampling for Flattening and Flaring Test and for Visual and Dimensional Examination -A4/3.3.3
The sampling plan in ASTM A530 section 26.1.3 is to be invoked only when specified in 2-13-12/3.9.
Stainless Steel 2-A4/3.3.4
Section 2-3-12 does not cover stainless steel pipe or tubing. Stainless steel pipe and tube are to be in accordance with ASTM A312, together with 2-13-12/3.9 Order Data requirements. The grade designation is the same as the corresponding ASTM grade designation. Additional requirements are listed below.
3.7.1 Intergranular Corrosion Test Corrosion test sampling is to be the same as sampling for tension test in accordance with ASTM A312. Corrosion test method is to be in accordance with ASTM A312, Supplementary Requirement S7.
3.7.2 Flattening Test Flattening test sampling is to be in accordance with ASTM A312. Flattening test method is to be in accordance with ASTM A312, Supplementary Requirement S3 except for sampling.
3.7.3 Ultrasonic Inspection When specified, each pipe and tube in each lot is to be inspected. Testing is to be in accordance with ASTM A530, section 26, and ASTM E213. The calibration standard is to have two longitudinal notches. One longitudinal notch is to be on the inside surface and one on the outside surface. Pipe or tube producing a signal equal to or greater than the calibration defect is to be subject to rejection. When each pipe or tube is subjected to an approved nondestructive electric test as a regular procedure during the process of manufacture, and affidavit covering this test may be accepted by the Surveyor.