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ASTM A322-24

Current Revision

Standard Specification for Steel Bars, Alloy, Standard Grades

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1.1 This specification covers hot-wrought alloy steel bars. Bar applications include forging, heat treating, cold drawing, machining, and many structural components (Note 1).

Note 1: A guide for the selection of steel bars is contained in Practice A400.

1.2 The bars shall be furnished in the grades specified in Table 1. Sections and sizes of bar steel available are covered in Specification A29/A29M. Hot-wrought alloy steel bars are produced in cut lengths and coils; the manufacturer should be consulted regarding sections and sizes available in coils, produced to a chemical composition.

1.3 Some applications may require superior surface quality, or special chemical restrictions, metallurgical characteristics, heat treatment, or surface finishes which the purchaser may obtain by designating one or more of the available Supplementary Requirements.

1.4 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 hot-wrought alloy steel bars. The steel shall be made by one or more of the following primary processes: open-hearth, basic-oxygen, or electric-furnace. The primary melting may incorporate separate degassing or refining and may be followed by secondary melting using electro-slag remelting or vacuum arc remelting. Where secondary remelting is employed, the heat shall be defined as all of the cast product remelted from a single primary heat. The steel shall be furnished as strand cast or ingot cast. Immediately after hot forming, the bars shall be allowed to cool to a temperature below the critical range under suitable conditions to prevent imperfections caused by too rapid cooling. The bars shall be free of pipe, cracks, and flakes. Within the limits of good manufacturing and inspection practices, the bars shall be free of injurious seams, laps, segregation, or other imperfections which are due to their nature, degree, or extent, will interfere with the use of the material in machining or fabrication of suitable parts.


SDO ASTM: ASTM International
Document Number A322
Publication Date Oct. 15, 2024
Language en - English
Page Count 4
Revision Level 24
Supercedes
Committee A01.15
Publish Date Document Id Type View
Oct. 15, 2024 A0322-24 Revision
Sept. 1, 2018 A0322-13R18E01 Revision
May 1, 2013 A0322-13 Revision
May 1, 2007 A0322-07 Revision
May 1, 2006 A0322-06 Revision
Aug. 15, 1991 A0322-91R01E01 Revision
Sept. 1, 2018 A0322-13R18 Reaffirmation
Aug. 15, 1991 A0322-91R01 Reaffirmation
Aug. 15, 1991 A0322-91R96 Reaffirmation