337.5 Mohs = 3.31 HRC
| Mohs | HRC |
|---|---|
| 322.5 Mohs | 3.16 |
| 327.5 Mohs | 3.21 |
| 332.5 Mohs | 3.26 |
| 337.5 | 3.31 |
| 342.5 Mohs | 3.36 |
| 347.5 Mohs | 3.41 |
| 352.5 Mohs | 3.46 |
337.5 Mohs = 3.31 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