ASTM A255 - 10(2014)

    Standard Test Methods for Determining Hardenability of Steel

    Active Standard ASTM A255 | Developed by Subcommittee: A01.15

    Book of Standards Volume: 01.05


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    Significance and Use

    3.1 This test method covers the procedure for determining the hardenability of steel by the end-quench or Jominy test. The test consists of water quenching one end of a cylindrical test specimen 1.0 in. in diameter and measuring the hardening response as a function of the distance from the quenched end.

    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:

     

    Element

    Range, %

     

     

     

     

    Carbon

    0.10–0.70

     

    Manganese

    0.50–1.65

     

    Silicon

    0.15–0.60

     

    Nickel

    1.50 max

     

    Chromium

    1.35 max

     

    Molybdenum

    0.55 max

     

    Copper

    0.35 max

     

    Vanadium

    0.20 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.

    (A) A variation of ±10°F (6°C) from the temperatures in this table is permissible.
    (B) Normalizing and austenitizing temperatures are 50°F (30°C) higher for the 6100 series.

    1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

    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(SteelĀ )


    Referencing This Standard

    DOI: 10.1520/A0255-10R14

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM A255-10(2014), Standard Test Methods for Determining Hardenability of Steel, ASTM International, West Conshohocken, PA, 2014, www.astm.org

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