Hardness Conversion
Convert between hardness scales per ASTM E140.
Common Reference Values
| HRC | HB | HV | Steel Type |
|---|---|---|---|
| 20 | 226 | 238 | Mild steel |
| 30 | 286 | 302 | Medium carbon |
| 40 | 371 | 392 | Tool steel |
| 50 | 481 | 513 | Hard tool steel |
| 60 | - | 697 | Max hardened |
Convert between hardness scales per ASTM E140.
| HRC | HB | HV | Steel Type |
|---|---|---|---|
| 20 | 226 | 238 | Mild steel |
| 30 | 286 | 302 | Medium carbon |
| 40 | 371 | 392 | Tool steel |
| 50 | 481 | 513 | Hard tool steel |
| 60 | - | 697 | Max hardened |