What workpieces are suitable for testing HRC, HV, and HB, and can they be converted to each other?
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HRC Rockwell: quenched hard steel, mold steel; HV Vickers: thin workpieces, surface coatings, carburizing layers, small parts; HB Brinell: cast iron, annealed mild steel.
There is a standard conversion table, but it is only for reference and cannot completely replace standard tests.
