France · AFNOR NF
TS 42 CP
NF A49-253
Chemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| C | 0.18 | |||
| Cu | 0.18 | |||
| Mn | 0.6 | |||
| P | 0.035 | |||
| S | 0.03 | |||
| Si | 0.3 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| steel tubes, welded steel tube, normalized, <= 30 mm | ≤245 | ≤410 | ≤27 | ≤30 | ||
| steel tubes, welded steel tube, normalized, > 30 mm | ≤245 | ≤410 | ≤25 | ≤30 | ||
| steel tubes, welded steel tube, normalized, All size | ≤35 | |||||
| steel tubes, HV | 焊接钢管 正火 All size (纵向) 280；焊接钢管 正火 > 30 mm (横向) 280；焊接钢管 正火 <= 30 mm (横向) 280 |