664.5 HRC = 6,777.9 HV
| HRC | HV |
|---|---|
| 649.5 HRC | 6,624.9 |
| 654.5 HRC | 6,675.9 |
| 659.5 HRC | 6,726.9 |
| 664.5 | 6,777.9 |
| 669.5 HRC | 6,828.9 |
| 674.5 HRC | 6,879.9 |
| 679.5 HRC | 6,930.9 |
664.5 HRC = 6,777.9 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