904 HRB = 1,627.2 HV
| HRB | HV |
|---|---|
| 889 HRB | 1,600.2 |
| 894 HRB | 1,609.2 |
| 899 HRB | 1,618.2 |
| 904 HRB | 1,627.2 |
| 909 HRB | 1,636.2 |
| 914 HRB | 1,645.2 |
| 919 HRB | 1,654.2 |
904 HRB = 1,627.2 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