405.5 Mohs = 3.98 HRC
| Mohs | HRC |
|---|---|
| 390.5 Mohs | 3.83 |
| 395.5 Mohs | 3.88 |
| 400.5 Mohs | 3.93 |
| 405.5 | 3.98 |
| 410.5 Mohs | 4.02 |
| 415.5 Mohs | 4.07 |
| 420.5 Mohs | 4.12 |
405.5 Mohs = 3.98 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