640.5 HRC = 6,533.1 HV
| HRC | HV |
|---|---|
| 625.5 HRC | 6,380.1 |
| 630.5 HRC | 6,431.1 |
| 635.5 HRC | 6,482.1 |
| 640.5 | 6,533.1 |
| 645.5 HRC | 6,584.1 |
| 650.5 HRC | 6,635.1 |
| 655.5 HRC | 6,686.1 |
640.5 HRC = 6,533.1 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