Research Report RR:E28-1022

    An interlaboratory study was conducted for test method E18 to represent the change in the precision statement from the use of steel balls to carbide balls for all scales that use a ball indenter.

    Published: April 2007

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    Related Standards

    E18-20 Standard Test Methods for Rockwell Hardness of Metallic Materials

    Committee E28 on Mechanical Testing

    Subcommittee E28.06 on Indentation Hardness Testing