ASTM A131/A131M-19
(Specification)Standard Specification for Structural Steel for Ships
Standard Specification for Structural Steel for Ships
ABSTRACT
This specification covers structural steel plates, shapes, bars, and rivets for use in ship construction. Materials under this specification can be categorized as ordinary strength and higher strength. Plates in all thicknesses shall be normalized or thermo-mechanical control processed while shapes and bars in all thicknesses shall be heat treated and rolled. Heat analysis of ordinary strength structural steel shall be used to determine the required chemical composition for carbon, manganese, phosphorus, sulfur, nickel, chromium, molybdenum, silicon, and copper. Same analysis shall be used to higher strength structural steel to determine the required chemical composition for carbon, manganese, phosphorus, sulfur, silicon, vanadium, aluminum, titanium, nickel, chromium, molybdenum, silicon, copper, nickel, and niobium. Materials shall conform to the required metallurgical structure which shall be evaluated by determining the average grain size. Mechanical properties such as elongation and toughness shall be evaluated using tension test and Charpy V-notch impact test.
SCOPE
1.1 This specification covers structural steel plates, shapes, and bars 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, and E with a specified minimum yield point of 34 ksi [235 MPa], and
1.2.2 Higher Strength—Grades AH, DH, EH, and FH with a specified minimum yield point of 46 ksi [315 MPa], 51 ksi [350 MPa], or 57 ksi [390 MPa].
1.3 Shapes and bars are normally available as Grades A, B, AH32, and AH36. Other grades may be furnished by agreement between the purchaser and the manufacturer.
1.4 The maximum thickness of products furnished under this specification is 4 in. [100 mm] for plates and 2 in. [50 mm] for shapes and bars.
1.5 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.
1.6 Units—This specification is expressed in both inch-pound units and in SI units; however, unless the purchase order or contract specifies the applicable M specification designation (SI units), the inch-pound units shall apply. The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard.
1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Buy Standard
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:A131/A131M −19
Standard Specification for
1
Structural Steel for Ships
This standard is issued under the fixed designationA131/A131M; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope* mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.1 This specification covers structural steel plates, shapes,
and bars intended primarily for use in ship construction.
2. Referenced Documents
1.2 Material under this specification is available in the 2
2.1 ASTM Standards:
following categories:
A6/A6M Specification for General Requirements for Rolled
1.2.1 Ordinary Strength—Grades A, B, D, and E with a
Structural Steel Bars, Plates, Shapes, and Sheet Piling
specified minimum yield point of 34 ksi [235 MPa], and
A370 Test Methods and Definitions for Mechanical Testing
1.2.2 Higher Strength—GradesAH, DH, EH, and FH with a
of Steel Products
specified minimum yield point of 46 ksi [315 MPa], 51 ksi
E112 Test Methods for Determining Average Grain Size
[350 MPa], or 57 ksi [390 MPa].
3. Terminology
1.3 Shapes and bars are normally available as GradesA, B,
AH32, and AH36. Other grades may be furnished by agree-
3.1 Definitions of Terms Specific to This Standard:
ment between the purchaser and the manufacturer. 3.1.1 control rolling (controlled rolling), n—a hot deforma-
tion process intended to provide austenite (and hence ferrite)
1.4 The maximum thickness of products furnished under
grain refinement by careful control of the pass-by-pass
this specification is 4 in. [100 mm] for plates and 2 in. [50 mm]
temperature/reduction schedule at high temperature regime
for shapes and bars.
whereausteniterecrystallizesaftereachrollingpassoratlower
1.5 When the steel is to be welded, it is presupposed that a
temperatures where the deformed austenite does not recrystal-
welding procedure suitable for the grade of steel and intended
lize between rolling passes, or both. In some cases, rolling may
3
use or service will be utilized. See Appendix X3 of Specifica-
extend below the temperature (Ar ) at which the transforma-
tion A6/A6M for information on weldability.
tion from austenite to ferrite begins, so the final rolling passes
1.6 Units—This specification is expressed in both inch- may involve deformation in the two-phase (austenite + ferrite)
pound units and in SI units; however, unless the purchase order region.
or contract specifies the applicable M specification designation
3.1.2 thermo-mechanical controlled processing, n—a steel
(SIunits),theinch-poundunitsshallapply.Thevaluesstatedin
treatment that consists of strict control of the steel temperature
eitherinch-poundunitsorSIunitsaretoberegardedseparately
and the rolling reduction. A high proportion of the rolling
as standard.Within the text, the SI units are shown in brackets.
reduction is to be carried out close to or below the Ar
3
The values stated in each system may not be exact equivalents;
transformation temperature and may involve rolling towards
therefore,eachsystemshallbeusedindependentlyoftheother.
the lower end of the temperature range of the intercritical
Combining values from the two systems may result in noncon-
dual-phase region, thus permitting little if any recrystallization
formance with the standard.
of the austenite. The process may involve accelerated cooling
1.7 This international standard was developed in accor- on completion of rolling.
dance with internationally recognized principles on standard-
4. Ordering Information
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom- 4.1 Specification A6/A6M establishes the rules for the
ordering information that should be complied with when
purchasing material to this specification.
1
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
2
A01.02 on Structural Steel for Bridges, Buildings, Rolling Stock and Ships. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved May 1, 2019. Published May 2019. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1931. Last previous edition approved in 2014 as A131/A131M – 14. Standards volume information, refer to the standard’s Document S
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: A131/A131M − 14 A131/A131M − 19
Standard Specification for
1
Structural Steel for Ships
This standard is issued under the fixed designation A131/A131M; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope*
1.1 This specification covers structural steel plates, shapes, bars, and rivetsbars 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, and E with a specified minimum yield point of 34 ksi [235 MPa], and
1.2.2 Higher Strength—Grades AH, DH, EH, and FH with a specified minimum yield point of 46 ksi [315 MPa], 51 ksi [350
MPa], or 57 ksi [390 MPa].
1.3 Shapes and bars are normally available as Grades A, B, AH32, and AH36. Other grades may be furnished by agreement
between the purchaser and the manufacturer.
1.4 The maximum thickness of products furnished under this specification is 4 in. [100 mm] for plates and 2 in. [50 mm] for
shapes and bars.
1.5 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.
1.6 Units—This specification is expressed in both inch-pound units and in SI units; however, unless the purchase order or
contract specifies the applicable M specification designation (SI units), the inch-pound units shall apply. 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 aremay not be exact equivalents; therefore, each system mustshall be used independently of the other.
Combining values from the two systems may result in nonconformance with this specification.the standard.
1.7 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
A6/A6M Specification for General Requirements for Rolled Structural Steel Bars, Plates, Shapes, and Sheet Piling
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
E112 Test Methods for Determining Average Grain Size
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 control rolling (controlled rolling), n—a hot deformation process intended to provide austenite (and hence ferrite) grain
refinement by careful control of the pass-by-pass temperature/reduction schedule at high temperature regime where austenite
recrystallizes after each rolling pass or at lower temperatures where the deformed austenite does not recrystallize between rolling
3
passes, or both. In some cases, rolling may extend below the temperature (Ar ) at which the transformation from austenite to ferrite
begins, so the final rolling passes may involve deformation in the two-phase (austenite + ferrite) region.
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.02
on Structural Steel for Bridges, Buildings, Rolling Stock and Ships.
Current edition approved Oct. 1, 2014May 1, 2019. Published October 2014May 2019. Originally approved in 1931. Last previous edition approved in 20132014 as
A131/A131M – 13.A131/A131M – 14. DOI: 10.1520/A0131_A0131M-14.10.1520/A0131_A0131M-19.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
A131/A131M − 19
3.1.2 thermo-mechanical controlled processing, n—a steel treatment that consists of strict contro
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.