Measuring material hardness for quality assurance
| Method | Indenter | Load | Range |
|---|---|---|---|
| Rockwell C (HRC) | Diamond cone (120 deg) | 150 kgf | 20-68 HRC |
| Rockwell B (HRB) | 1/16in ball | 100 kgf | 80-100 HRB |
| Brinell (HB) | 10mm ball | 3000 kgf | 100-650 HB |
| Vickers (HV) | Diamond pyramid | 1-1000 gf | All |