351.5 Mohs = 3.45 HRC
| Mohs | HRC |
|---|---|
| 336.5 Mohs | 3.3 |
| 341.5 Mohs | 3.35 |
| 346.5 Mohs | 3.4 |
| 351.5 | 3.45 |
| 356.5 Mohs | 3.5 |
| 361.5 Mohs | 3.54 |
| 366.5 Mohs | 3.59 |
351.5 Mohs = 3.45 HRC
1 HRC ≈ 10.2 HV · 1 HRB ≈ 1.8 HV · 1 Mohs ≈ 0.1 HV — approximate; real conversions vary by material per ASTM E140