France · AFNOR NF
13 MF 4
NF A37-401
Chemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| C | 0.1 | 0.16 | ||
| Mn | 0.8 | 1.1 | ||
| P | 0.04 | |||
| S | 0.1 | 0.15 | ||
| Si | 0.1 | 0.4 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| round bars | ≥250 Upper Yield Stress | 370–470 | ≥27 |
Heat treatment
| Type | 1 |
|---|---|
| Heat-treatment curve | Hardness-Tempering |