Instruction and data sheets Hardness correspondences BRINELL Ball 3 mm - load 3 t. Rm VICKERS ROCKWELL Diamond Ball 1/16" Ø ball impression W carbide ball HB MPa HV Load 150 kg HRC Load 100 kg HB a) NM = Non measurable values b) Correspondances are approximative : exact tensile strength (Rm) can be obtained only by a tensile test

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