398.5 Mohs = 3.91 HRC
| Mohs | HRC |
|---|---|
| 383.5 Mohs | 3.76 |
| 388.5 Mohs | 3.81 |
| 393.5 Mohs | 3.86 |
| 398.5 | 3.91 |
| 403.5 Mohs | 3.96 |
| 408.5 Mohs | 4 |
| 413.5 Mohs | 4.05 |
398.5 Mohs = 3.91 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