Q235NH Chemical composition and mechanical properties of a Chinese grade weathering steel
Q235NH Chemical Composition
| Grage | Chemical Composition(Quality Fraction)/% | |||||||||
| C | Si | Mn | P | S | Cu | Cr | Ni | others | ||
| Q235NH | ≤0 .13 | 0 .1 ~ 0 .4 |
0.2~0.6 | ≤0 . 03 | ≤0 . 03 | 0 .25 ~ 0 .55 | 0.4 ~0.8 | ≤0.65 | a , b | |
Q235NH Mechanical properties and processing properties
| Grade | Tensile Test a | 180 °Bending test mandrel diameter | ||||||||||||
| Lower yield strength ReL ≥ | Tensile Strength Rm |
Elongation after fracture A/%≥ | ||||||||||||
| ≤16 | >16 ~40 | >40 ~60 | >60 | ≤16 | >16~40 | >40~60 | >60 | ≤6 | >6 ~16 | >16 | ||||
| Q235NH | 355 | 345 | - | - | 490 ~ 630 | 22 | 22 | - | - | a | 2a | 3a | ||
Note: 'a' represents the steel thickness.
When a yield plateau is not evident, Rp0.2 may be used.