... the steel, have the color metals, the thin slice of IC, thin plastics, metals thin slice . HBRVU-187.5 Brinell, Rockwell & Vickers Optical ... system applied to test the Brinell, Rockwell and Vickers hardness of metal materials. It is the multi-functional hardness tester ... steel, alloy steel, cast iron, nonferrous metals, all kinds of quenched and annealed steel, hardened steel sheet, also suitable for ...