ASTM A255-02

    Historical Standard: ASTM A255-02 Standard Test Method for Determining Hardenability of Steel

    SUPERSEDED (see Active link, below)


    Buy Standard (PDF)
    24 pages
    $72.00

    Active (view current version of standard)


    ASTM A255

    1. Scope

    1.1 These test methods cover the identification and description of test methods for determining the hardenability of steels. The two test methods include the quantitative end-quench or Jominy Test and a method for calculating the hardenability of steel from the chemical composition based on the original work by M. A. Grossman.

    1.2 The selection of the test method to be used for determining the hardenability of a given steel shall be agreed upon between the supplier and user. The Certified Material Test Report shall state the method of hardenability determination.

    1.3 The calculation method described in these test methods is applicable only to the range of chemical compositions that follow:

    ElementRange, %
    Carbon0.10-0.70
    Manganese0.50-1.65
    Silicon0.15-0.60
    Chromium1.35 max
    Nickel1.50 max
    Molybdenum0.55 max

    1.4 Hardenability is a measure of the depth to which steel will harden when quenched from its austenitizing temperature (Table 1). It is measured quantitatively, usually by noting the extent or depth of hardening of a standard size and shape of test specimen in a standardized quench. In the end-quench test the depth of hardening is the distance along the specimen from the quenched end which correlates to a given hardness level.

    1.5 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.

    1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.


    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

    E18 Test Methods for Rockwell Hardness of Metallic Materials

    E112 Test Methods for Determining Average Grain Size


    ICS Code

    ICS Number Code 77.080.20 (Steels)

    UNSPSC Code

    UNSPSC Code 11101704(Steel )


    DOI: 10.1520/A0255-02

    ASTM International is a member of CrossRef.


    Citing ASTM Standards
    Back to Top