| Hardeness (HB) |
Resistance RM (N/mm2) |
Extension A (%) |
||
|---|---|---|---|---|
| Free-cutting steel | <200 | <700 | <10 | |
| Structural/ cementation steel | <200 | <700 | <30 | |
| Carbon steels | <300 | <1000 | <20 | |
| Alloy steels < 850 n/mm2 | <250 | <850 | <30 | |
| Alloy steels hard./temp. > 850 - < 1150 N/mm2 | >250 | >850 | <30 | |
| High tensile alloy steel ≤ 44 HRC | >250 | >850 | <12 | |
| High tensile alloy steel > 55 HRC | >44 HRC | 54 HRC | ||
| Alloy steels hardened > 54 - ≤ 63 HRC | 55 HRc | 63 HRc | ||