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.
Pages: 56 Published: December 2011
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D409/D409M-12 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