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ASTM A529/A529M-26

Standard Specification for High-Strength Carbon-Manganese Steel of Structural Quality
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ASTM A529/A529M-26

Standard Specification for High-Strength Carbon-Manganese Steel of Structural Quality

PUBLISH DATE 2026
PAGES 3
ASTM A529/A529M-26

This specification covers high-strength carbon-manganese steel shapes, plates, and bars of structural quality for use in riveted, bolted, or welded construction of buildings and for general structural purposes. Materials considered here are available in Grades 50 [345] and 55 [380].

Steel specimens shall be killed, and as such, be affirmed in the corresponding test report.

Heat and product analysis shall be performed wherein steel materials shall conform to the required chemical compositions of carbon, manganese, phosphorus, sulfur, silicon, copper, columbium, chromium, nickel, molybdenum, and vanadium.

Steel specimens shall also undergo tensile tests and shall conform to required values of tensile strength, yield strength, and elongation.

1.1 This specification covers carbon-manganese steel shapes, plates, and bars of structural quality for use in riveted, bolted, or welded construction of buildings and for general structural purposes.

1.2 Material under this specification is available in two grades:

  • Grade 50 [345]
    • Yield Strength: 50 [345] ksi [MPa]
    • Plates to 1 in. [25 mm] thick to 15 in. [380 mm] wide
    • Bars to 31/2 in. [90 mm]
    • Shapes with flange or leg thickness to 11/2 in. [40 mm] inclusive
  • Grade 55 [380]
    • Yield Strength: 55 [380] ksi [MPa]
    • Plates to 1 in. [25 mm] thick to 15 in. [380 mm] wide
    • Bars to 3 in. [75 mm]
    • Shapes with flange or leg thickness to 11/2 in. [40 mm] inclusive

1.3 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.

1.4 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.

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.

SDO ASTM: ASTM International
Document Number A529
Publication Date April 1, 2026
Language en - English
Page Count 3
Revision Level 26
Supercedes
Committee A01.02
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