ASTM A304-05

    Standard Specification for Carbon and Alloy Steel Bars Subject to End-Quench Hardenability Requirements

    SUPERSEDED (see Active link, below)


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    1. Scope

    1.1 This specification covers hot-worked alloy, carbon, and carbon-boron steels in a variety of compositions and sizes, which may attain specified depth of hardening in the end quench test. These steel compositions are identified by the suffix letter "H" added to the conventional grade number.

    1.2 This specification provides for analyses other than those listed under . Special hardenability limits are also permissible when approved by the purchaser and manufacturer.

    1.3 The values stated in inch-pound units are to be regarded as the standard.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    A29/A29M Specification for Steel Bars, Carbon and Alloy, Hot-Wrought, General Requirements for

    A108 Specification for Steel Bar, Carbon and Alloy, Cold-Finished

    A255 Test Methods for Determining Hardenability of Steel

    E112 Test Methods for Determining Average Grain Size

    E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)


    ICS Code

    ICS Number Code 77.140.60 (Steel bars and rods)

    UNSPSC Code

    UNSPSC Code 30263600(Carbon steel bars); 30263700(Steel alloy bars)


    DOI: 10.1520/A0304-05

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