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Hardness Conversion: HRB
80 to 89
Hardness conversion table — Rockwell B, Rockwell C, Brinell, and Vickers equivalents per ASTM E140 and ASTM A370
| scale | hardness value | hb (dimensionless) | hrb (dimensionless) | hv (dimensionless) | material class |
|---|---|---|---|---|---|
| HRB | 80 | 146 | 80 | 146 | steel |
| HRB | 81 | 149 | 81 | 149 | steel |
| HRB | 82 | 152 | 82 | 152 | steel |
| HRB | 83 | 156 | 83 | 156 | steel |
| HRB | 84 | 160 | 84 | 160 | steel |
| HRB | 85 | 164 | 85 | 164 | steel |
| HRB | 86 | 168 | 86 | 168 | steel |
| HRB | 87 | 172 | 87 | 172 | steel |
| HRB | 88 | 176 | 88 | 176 | steel |
| HRB | 89 | 180 | 89 | 180 | steel |
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