Hardness Values

HBW

Brinell hardness number (BHN) using a 10-mm 3,000 kgf carbide ball (HBW 10/3000)

HBS

Brinell hardness number (BHN) using a 10-mm 500 kgf steel ball (HBS 10/500)

HRC

Rockwell C hardness number (using a 150 kgf load)

HRB

Rockwell B hardness number (using a 100 kgf load)

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