ASTM WK75613

    Revision of A370 - 20 Standard Test Methods and Definitions for Mechanical Testing of Steel Products

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    Active Standard: A370 - 20

    Developed by Subcommittee: A01.13 | Committee A01 | Contact Staff Manager



    WK75613


    Keywords

    bend test; Brinell hardness; Charpy impact test; elongation; FATT (Fracture Appearance Transition Temperature); hardness test; Izod impact test; portable hardness; reduction of area; Rockwell hardness; tensile strength; tension test; yield strength;;

    Rationale

    Currently A01.13 contains the following statement: 3.2.1 As with any mechanical testing, deviations from either specification limits or expected as-manufactured properties can occur for valid reasons besides deficiency of the original as-fabricated product. These reasons include, but are not limited to: subsequent service degradation from environmental exposure (for example, temperature, corrosion); static or cyclic service stress effects, mechanically-induced damage, material inhomogeneity, anisotropic structure, natural aging of select alloys, further processing not included in the specification, sampling limitations, and measuring equipment calibration uncertainty. There is statistical variation in all aspects of mechanical testing and variations in test results from prior tests are expected. An understanding of possible reasons for deviation from specified or expected test values should be applied in interpretation of test results. There are currently no recommendations or allowances for variation beyond product specification limits for mechanical properties. The purpose of this revision is to begin to address tolerances for mechanical properties. There is a pressing need for mechanical property product check tolerances. Material grades exist that have very narrow ranges for mechanical properties. Recognizing the importance of addressing product test tolerances for mechanical properties, this revision adds an informative appendix and an annex. The annex at this time covers only limited tension testing. The intention is that in the future, the annex will be expanded to include other testing.

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    Work Item Status

    Date Initiated:
    01-26-2021

    Technical Contact:
    Lester Burgess

    Item:
    004

    Ballot:
    A01.13 (21-01)

    Status:
    Negative Votes Need Resolution