636.5 Mohs = 6.24 HRC
| Mohs | HRC |
|---|---|
| 621.5 Mohs | 6.09 |
| 626.5 Mohs | 6.14 |
| 631.5 Mohs | 6.19 |
| 636.5 | 6.24 |
| 641.5 Mohs | 6.29 |
| 646.5 Mohs | 6.34 |
| 651.5 Mohs | 6.39 |
636.5 Mohs = 6.24 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