321.5 HRC = 3,279.3 HV
| HRC | HV |
|---|---|
| 306.5 HRC | 3,126.3 |
| 311.5 HRC | 3,177.3 |
| 316.5 HRC | 3,228.3 |
| 321.5 | 3,279.3 |
| 326.5 HRC | 3,330.3 |
| 331.5 HRC | 3,381.3 |
| 336.5 HRC | 3,432.3 |
321.5 HRC = 3,279.3 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