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ASTM A242/A242M-24

Current Revision

Standard Specification for High-Strength Low-Alloy Structural Steel

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1.1 This specification covers high-strength low-alloy structural steel shapes, plates, and bars for welded, riveted, or bolted construction intended primarily for use as structural members where savings in weight [mass] or added durability are important. The atmospheric corrosion resistance of the steel in most environments is substantially better than that of carbon structural steels with or without copper addition. When properly exposed to the atmosphere, this steel can be used bare (unpainted) for many applications (see Note 1). This specification is limited to material up to 4 in. [100 mm], inclusive, in thickness.

Note 1: For methods of estimating the atmospheric corrosion resistance of low-alloy steels, see Guide G101.

1.2 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.

1.3 The values stated in either inch-pound units or SI units are to be regarded as 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 the specification.

1.4 For structural products produced from coil and furnished without heat treatment or with stress relieving only, the additional requirements, including additional testing requirements and the reporting of additional test results, of Specification A6/A6M apply.

1.5 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.


This specification covers high-strength low-alloy structural steel shapes, plates, and bars for welded, riveted, or bolted construction intended primarily for use as structural members where savings in weight (mass) or added durability are important. Steel specimens shall be semi-killed or killed. Heat analysis shall be performed wherein steel specimens shall conform to required chemical compositions of carbon, manganese, phosphorus, sulfur, and copper. Atmospheric corrosion resistance shall be estimated for steel specimens. Specimens shall also undergo tension tests and shall conform to specified values of tensile strength, yield point, and elongation.


SDO ASTM: ASTM International
Document Number A242
Publication Date March 1, 2024
Language en - English
Page Count 3
Revision Level 24
Supercedes
Committee A01.02
Publish Date Document Id Type View
March 1, 2024 A0242_A0242M-24 Revision
May 1, 2013 A0242_A0242M-13 Revision
April 1, 2004 A0242_A0242M-04E01 Revision
April 1, 2004 A0242_A0242M-04 Revision
May 10, 2003 A0242_A0242M-03A Revision
April 10, 2003 A0242_A0242M-03 Revision
Sept. 10, 2001 A0242_A0242M-01 Revision
Sept. 10, 2001 A0242_A0242M-00A Revision
March 1, 2018 A0242_A0242M-13R18 Reaffirmation
April 1, 2009 A0242_A0242M-04R09 Reaffirmation