France · AFNOR NF
TU 15 D 3
NF A49-215
Chemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| Al | 0.25 | |||
| C | 0.1 | 0.22 | ||
| Cr | 0.4 | |||
| Cu | 0.25 | |||
| Mn | 0.4 | 0.9 | ||
| Mo | 0.21 | 0.39 | ||
| Ni | 0.3 | |||
| P | 0.045 | |||
| S | 0.045 | |||
| Si | 0.1 | 0.4 | ||
| Sn | 0.03 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| seamless steel tube, steel tubes, Heat treated | ≤265 | ≤430 | ≤22 | |||
| seamless steel tube, HR | 钢管 Heat treated ≤84 |