Metallic materials. Rockwell hardness test - Verification and calibration of testing machines and indentersWhat is this standard about? This is the second in a three part international standard on the Rockwell test for metallic materials. The other two parts are: Part 1: Metallic materials. Rockwell hardness test. Test method Part 3: Calibration of reference blocks Who is this standard for? Rockwell hardness testing machine and indenter manufacturers Users of the Rockwell hardness test Why should you use this standard? This part of ISO 6508 specifies two

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