407.5 Mohs = 4 HRC
| Mohs | HRC |
|---|---|
| 392.5 Mohs | 3.85 |
| 397.5 Mohs | 3.9 |
| 402.5 Mohs | 3.95 |
| 407.5 | 4 |
| 412.5 Mohs | 4.04 |
| 417.5 Mohs | 4.09 |
| 422.5 Mohs | 4.14 |
407.5 Mohs = 4 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