Q355GNH Chemical composition and mechanical properties of a Chinese grade weathering steel
Q355GNH Chemical Composition
| Grage | Chemical Composition(Quality Fraction)/% | |||||||||
| C | Si | Mn | P | S | Cu | Cr | Ni | others | ||
| Q355GNH | ≤0 .12 | 0 . 25 ~ 0 . 75 |
≤1.0 | 0 . 07 ~ 0 . 15 |
≤0 . 020 | 0 . 25 ~ 0 . 55 |
0 . 30 ~ 1.25 |
≤0.65 | a , b | |
Q355GNH 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 | ||||
| Q355GNH | 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.