274.5 Mohs = 2.69 HRC
| Mohs | HRC |
|---|---|
| 259.5 Mohs | 2.54 |
| 264.5 Mohs | 2.59 |
| 269.5 Mohs | 2.64 |
| 274.5 | 2.69 |
| 279.5 Mohs | 2.74 |
| 284.5 Mohs | 2.79 |
| 289.5 Mohs | 2.84 |
274.5 Mohs = 2.69 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