Hardness conversion table

■Conversion table from Rockwell C hardness of steel. (Approximate) ■

Rockwell C Scale HardnessVickers HardnessStandard ball Brinell HTungsten Carbide ball ardnessA scale RoB scale ckwell HardnessD scale �215-N scale Rockwel i30-N scale l Superficial Hi ardness 45-N scaleShore HardnessTensile Strength MPa�1Rockwell C Scale Hardness�2
HRCHVHBHRAHRBHRDHS15NHS30NHS45NHSHRC

1 : 1Mpa=1N/mm2 2 : In above table, numbers in parenthesis are only for reference. This table is abstracted from SAE J 417.