618.5 Mohs = 6.06 HRC
| Mohs | HRC |
|---|---|
| 603.5 Mohs | 5.92 |
| 608.5 Mohs | 5.97 |
| 613.5 Mohs | 6.01 |
| 618.5 | 6.06 |
| 623.5 Mohs | 6.11 |
| 628.5 Mohs | 6.16 |
| 633.5 Mohs | 6.21 |
618.5 Mohs = 6.06 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