520.5 Mohs = 5.1 HRC
| Mohs | HRC |
|---|---|
| 505.5 Mohs | 4.96 |
| 510.5 Mohs | 5 |
| 515.5 Mohs | 5.05 |
| 520.5 | 5.1 |
| 525.5 Mohs | 5.15 |
| 530.5 Mohs | 5.2 |
| 535.5 Mohs | 5.25 |
520.5 Mohs = 5.1 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