Chemical composition %: | |||||||
C | Si | Mn | S | P | Cr | Ni | Cu |
0.27-0.34 | 0.17-0.37 | 0.70-1.00 | ≤0.035 | ≤0.035 | ≤0.25 | ≤0.30 | ≤0.25 |
mechanical properties: | ||||||
Tensile strength σb (Mpa) | Yield strength σb (Mpa) | Elongation σb (%) | reduction of area ψ (%) | Hardness No heat treatment | Impacting Energy Akv (J) | Notched bar impact strength αkv (J/cm2) |
min | min | min | min | max | min | min |
540(55) | 315(32) | 20 | 45 | 217HB | 63 | 78(8) |