ASTM E18-20: Rockwell Hardness Standard Test Methods
Apr 21, 2022· The Rockwell hardness test, according to ASTM E18-20, is an indentation hardness test that involves the use of a verified machine to force a diamond spheroconical indenter or tungsten carbide (or steel) ball indenter into the surface of a material. Hardness is evaluated by measuring the difference in depth of the indentation as the force on the indenter is increased from a specified preliminary test
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