France · AFNOR NF
Z 6 CN 19-10
NF A49-214
Chemical composition
| Element | min | max | Similar | Remarks |
|---|---|---|---|---|
| B | 0.001 | 0.003 | ||
| C | 0.04 | 0.08 | ||
| Cr | 18 | 20 | ||
| Mn | 2 | |||
| Ni | 8 | 11 | ||
| P | 0.035 | |||
| S | 0.03 | |||
| Si | 1 |
Mechanical properties
| Heat treatment / condition | Yield strength | Tensile strength | Elongation | Reduction of area | Impact energy | Hardness |
|---|---|---|---|---|---|---|
| steel tubes, seamless steel tube, annealed | ≤195 | ≤490 | ≤40 | |||
| steel tubes, HB | 无缝钢管 退火 190 | |||||
| steel tubes, HR | 无缝钢管 退火 90 |