431.5 Mohs = 4.23 HRC
| Mohs | HRC |
|---|---|
| 416.5 Mohs | 4.08 |
| 421.5 Mohs | 4.13 |
| 426.5 Mohs | 4.18 |
| 431.5 | 4.23 |
| 436.5 Mohs | 4.28 |
| 441.5 Mohs | 4.33 |
| 446.5 Mohs | 4.38 |
431.5 Mohs = 4.23 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