621.5 HRC = 6,339.3 HV
| HRC | HV |
|---|---|
| 606.5 HRC | 6,186.3 |
| 611.5 HRC | 6,237.3 |
| 616.5 HRC | 6,288.3 |
| 621.5 | 6,339.3 |
| 626.5 HRC | 6,390.3 |
| 631.5 HRC | 6,441.3 |
| 636.5 HRC | 6,492.3 |
621.5 HRC = 6,339.3 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