Q355GNH weather resistant steel, that is, atmospheric corrosion resistant steel, is a low alloy steel series between ordinary steel and stainless steel. Q355GNH weather resistant steel is made of ordinary carbon steel with a small amount of corrosion-resistant elements such as copper and nickel.
Q stands for yield strength,355 stands for the lower limit of yield strength of steel, in N/mm²,GNH stands for high weather resistance. The implementation standard of Q355GNH weather resistant steel is GB/T 4171-2008. Q355GNH weather resistant steel is delivered hot rolled, controlled rolled or normalized.
| Grade | Q355GNH steel chemical composition(%) | ||||
| C Max | Si | Mn Max | P | S Max | |
| Q355GNH | 0.15 | 0.25-0.75 | 1.0 | 0.07-0.15 | 0.02 |
| Grade | Q355GNH steel mechanical property | ||||
| Yield Strength(MPa) | Tensile Strength(MPa) | % Elongation min | |||
| Q355GNH | 345-355 | 490-630 | 22 | ||
Q355GNH weather resistant steel has the characteristics of rust resistance, strong corrosion resistance, thinning and consumption reduction, labor saving and energy saving. Q355GN weather resistant steel is mainly used in railways, vehicles, bridges, towers and other steel structures exposed to the atmosphere for a long time, structural parts such as containers for hydrogen corrosive media.
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