451.5 Mohs = 4.43 HRC
| Mohs | HRC |
|---|---|
| 436.5 Mohs | 4.28 |
| 441.5 Mohs | 4.33 |
| 446.5 Mohs | 4.38 |
| 451.5 | 4.43 |
| 456.5 Mohs | 4.48 |
| 461.5 Mohs | 4.52 |
| 466.5 Mohs | 4.57 |
451.5 Mohs = 4.43 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