The correct ASTM designation for testingcold crushing strength (CCS)of refractory materials isASTM C133. This test determines the load at which a sample fails under compressive stress and is essential for assessing the structural integrity of castable and formed refractories.
ASTM C113 relates to permanent linear change.
ASTM C704 is for abrasion resistance.
ASTM C417 is not related to CCS in this context.
[Reference:, API Std 936 references ASTM C133 as the governing method for determining cold crushing strength of refractory samples., Also validated in API TR 978 –Monolithic Refractories: Properties and Selection​, ]
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