Metal Hardness Table
The table below contains the hardness, on the Rockwell C scale, for some of the most popular metals used every day in the production of parts and molds.
| Material | Rockwell HRC |
|---|---|
| Structural Steel St37-2 | <=10 |
| Structural Steel St52-3 | <=11 |
| Impax Supreme | <35 |
| 4140 Steel | 22~35 |
| Gray Cast Iron | 20~45 |
| Inox 304 | 15~25 |
| Inox 316 | 25~39 |
The values in the table are indicative.
