177.5 Mohs = 1.74 HRC
| Mohs | HRC |
|---|---|
| 162.5 Mohs | 1.59 |
| 167.5 Mohs | 1.64 |
| 172.5 Mohs | 1.69 |
| 177.5 | 1.74 |
| 182.5 Mohs | 1.79 |
| 187.5 Mohs | 1.84 |
| 192.5 Mohs | 1.89 |
177.5 Mohs = 1.74 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