420.5 Mohs = 4.12 HRC
| Mohs | HRC |
|---|---|
| 405.5 Mohs | 3.98 |
| 410.5 Mohs | 4.02 |
| 415.5 Mohs | 4.07 |
| 420.5 | 4.12 |
| 425.5 Mohs | 4.17 |
| 430.5 Mohs | 4.22 |
| 435.5 Mohs | 4.27 |
420.5 Mohs = 4.12 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