Hardness Conversion: HRC
Hardness conversion table — Rockwell B, Rockwell C, Brinell, and Vickers equivalents per ASTM E140 and ASTM A370
| scale | hardness value | approximate tensile ksi | approximate tensile mpa | hb (dimensionless) | hrc | hv (dimensionless) | material class | notes |
|---|---|---|---|---|---|---|---|---|
| HRC | 20 | 54 | 372 | 190 | 20 | 238 | steel | Lower practical limit for HRC scale on steel. Approximate tensile via ASTM A370 |
| HRC | 21 | 55 | 379 | 195 | 21 | 243 | steel | Approximate tensile via ASTM A370 |
| HRC | 22 | 57 | 393 | 200 | 22 | 248 | steel | Approximate tensile via ASTM A370 |
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