France · AFNOR NF
XC 45
NF A37-502
Chemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| C | 0.42 | 0.48 | ||
| Mn | 0.5 | 0.8 | ||
| P | 0.035 | |||
| S | 0.025 | |||
| Si | 0.1 | 0.35 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| steel strip, tempered | 450–570；570–690；650–770；770–890 | |||||
| steel strip, annealed | ≤510 | ≥23 Lo= 50 mm | HR ≤85 Hardened 1038℃ |