ASTM A131/A131M-01

Standard Specification for Structural Steel for Ships

SCOPE
1.1 This specification covers structural steel shapes, plates, bars, and rivets intended primarily for use in ship construction.  
1.2 Material under this specification is available in the following categories:  
1.2.1  Ordinary Strength—Grades A, B, D, DS, CS, and E with a specified minimum yield point of 34 ksi [235 MPa], and  
1.2.2 Higher Strength— Grades AH, DH, and EH with specified minimum yield points of either 46 ksi [315 MPa], 51 ksi [350 MPa], or 57 ksi [390 MPa].  
1.3 Shapes and bars are normally available as Grades A, AH32, or AH36. Other grades may be furnished by agreement between the purchaser and the manufacturer.  
1.4 When the steel is to be welded, it is presupposed that a welding procedure suitable for the grade of steel and intended use or service will be utilized. See Appendix X3 of Specification A6/A6M for information on weldability.  
1.5 The values stated in either inch-pound units or SI units are to be regarded separately as the standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with this specification.

General Information

• Status: Historical
• Publication Date: 09-Jun-2001
• ICS: 47.020.05 - Materials and components for shipbuilding
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.02 - Structural Steel for Bridges, Buildings, Rolling Stock and Ships

Relations

• Replaces: ASTM A131/A131M-94 - Standard Specification for Structural Steel for Ships
• Effective Date: 10-Jun-2001
• Referred By: ASTM A786/A786M-15(2021) - Standard Specification for Hot-Rolled Carbon, Low-Alloy, High-Strength Low-Alloy, and Alloy Steel Floor Plates
• Effective Date: 10-Jun-2001
• Referred By: ASTM F1069-19 - Standard Specification for Doors, Watertight, Gastight/Airtight and Weathertight, Individually Dogged, for Marine Use
• Effective Date: 10-Jun-2001
• Referred By: ASTM F1068-90(2023) - Standard Specification for Doors, Double, Gastight/Airtight, Individually Dogged, for Marine Use
• Effective Date: 10-Jun-2001
• Referred By: ASTM A6/A6M-22 - Standard Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling
• Effective Date: 10-Jun-2001
• Referred By: ASTM F1143-19 - Standard Specification for Manhole Cover Assembly, Bolted, Raised, Oiltight and Watertight
• Effective Date: 10-Jun-2001
• Referred By: ASTM F1070-19 - Standard Specification for Doors, Non-Tight, for Marine Use
• Effective Date: 10-Jun-2001
• Referred By: ASTM F1142-19 - Standard Specification for Manhole Cover Assembly, Bolted, Semi-Flush, Oiltight and Watertight
• Effective Date: 10-Jun-2001
• Referred By: ASTM F1144-19 - Standard Specification for Manhole Cover Assembly, Bolted, Semi-Flush, Oiltight and Watertight, Hinged
• Effective Date: 10-Jun-2001

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: A 131/A 131M – 01
Standard Specification for
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Structural Steel for Ships
This standard is issued under the fixed designation A 131/A 131M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Terminology
1.1 This specification covers structural steel plates, shapes, 3.1 Definitions of Terms Specific to This Standard:
bars, and rivets intended primarily for use in ship construction. 3.1.1 control rolling, n—a steel treatment that consists of
1.2 Material under this specification is available in the final rolling within the range used for normalizing heat
following categories: treatments so that the austenite completely recrystallizes.
1.2.1 Ordinary Strength—Grades A, B, D, CS, and E with a 3.1.2 thermo-mechanical controlled processing, n—a steel
specified minimum yield point of 34 ksi [235 MPa], and treatment that consists of strict control of the steel temperature
1.2.2 Higher Strength—Grades AH, DH, EH, and FH with and the rolling reduction. A high proportion of the rolling
specified minimum yield points of either 46 ksi [315 MPa], 51 reduction is to be carried out close to or below the Ar
3
ksi [350 MPa], or 57 ksi [390 MPa]. transformation temperature and may involve rolling towards
1.3 Shapes and bars are normally available as Grades A, the lower end of the temperature range of the intercritical
AH32, or AH36. Other grades may be furnished by agreement duplex phase region thus permitting little if any recrystalliza-
between the purchaser and the manufacturer. tion of the austenite. The process may involve accelerated
1.4 When the steel is to be welded, it is presupposed that a cooling on completion of rolling.
welding procedure suitable for the grade of steel and intended
4. Ordering Information
use or service will be utilized. See Appendix X3 of Specifica-
4.1 Specification A 6/A 6M establishes the rules for the
tion A 6/A 6M for information on weldability.
1.5 The values stated in either inch-pound units or SI units ordering information that should be complied with when
purchasing material to this specification.
are to be regarded separately as the standard. Within the text,
the SI units are shown in brackets. The values stated in each 4.2 Additional ordering considerations specific to this speci-
fication are:
system are not exact equivalents; therefore, each system must
4.2.1 Cold flanging, if applicable, and
be used independently of the other. Combining values from the
two systems may result in nonconformance with this specifi- 4.2.2 Condition (control rolled or thermo-mechanical con-
trol processed).
cation.
2. Referenced Documents 5. Materials and Manufacture
1
5.1 Except for Grade A steel up to and including ⁄2 in. [12.5
2.1 ASTM Standards:
A 6/A6M Specification for General Requirements for mm] in thickness, rimmed steels shall not be applied.
5.2 Except for Grades A and B steel, semi-killed steels shall
Rolled Structural Steel Bars, Plates, Shapes, and Sheet
2
Piling not be applied.
5.3 Except as permitted in 5.3.1, Grades D, CS, E, AH32,
A 370 Test Methods and Definitions for Mechanical Testing
3
of Steel Products AH36, AH40, DH32, DH36, DH40, EH32, EH36, EH40,
4
FH32, FH36, and FH40 shall be made using a fine grain
E 112 Test Methods for Determining Average Grain Size
practice. For ordinary strength grades, aluminum shall be used
to obtain grain refinement. For high strength grades, aluminum,
vanadium, or columbium (niobium) may be used for grain
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
refinement.
Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee
5.3.1 Grade D material 1.0 in. [25 mm] and under in
A01.02 on Structural Steel for Bridges, Buildings, Rolling Stock, and Ships.
Current edition approved June 10, 2001. Published August 2001. Originally
thickness, at the option of the manufacturer, may be killed and
published as A 131 – 31 T. Last previous edition A 131/A 131M – 94.
exempt from the fine austenitic grain size requirement of 7.1,
2
Annual Book of ASTM Standards, Vol 01.04.
3 but such material shall be subject to the toughness requirement
Annual Book of ASTM Standards, Vol 01.03.
4
Annual Book of ASTM Standards, Vol 03.01. of 8.2.1.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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A 131/A 131M – 01
5.4 Plates in all thicknesses ordered to Grade CS shall be 7.2.1 Minimum columbium (niobium) content of 0.020 %
normalized. Plates in all thicknesses ordered to Grade E shall or minimu
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