657.5 HRC = 6,706.5 HV
| HRC | HV |
|---|---|
| 642.5 HRC | 6,553.5 |
| 647.5 HRC | 6,604.5 |
| 652.5 HRC | 6,655.5 |
| 657.5 | 6,706.5 |
| 662.5 HRC | 6,757.5 |
| 667.5 HRC | 6,808.5 |
| 672.5 HRC | 6,859.5 |
657.5 HRC = 6,706.5 HV
1 HRC ≈ 10.2 HV · 1 HRB ≈ 1.8 HV · 1 Mohs ≈ 0.1 HV — approximate; real conversions vary by material per ASTM E140