Research Report RR:D05-1040

    An interlaboratory study was conducted by fourteen seventeen testing fifteen coal samples to establish a precision statement for test method D409.

    Published: December 2011

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    Related Standards

    D409/D409M-16 Standard Test Method for Grindability of Coal by the Hardgrove-Machine Method

    Committee D05 on Coal and Coke

    Subcommittee D05.07 on Physical Characteristics of Coal