918 HRB = 1,652.4 HV
| HRB | HV |
|---|---|
| 903 HRB | 1,625.4 |
| 908 HRB | 1,634.4 |
| 913 HRB | 1,643.4 |
| 918 HRB | 1,652.4 |
| 923 HRB | 1,661.4 |
| 928 HRB | 1,670.4 |
| 933 HRB | 1,679.4 |
918 HRB = 1,652.4 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