GB/T 4171 Grade Q355GNH steel is a kind of atmospheric corrosion resisting structural steel. Q355GNH steel has the characteristics of steel strength, ductility, forming, welding, abrasion, high temperature, fatigue resistance, etc. The weather resistance is 2 to 8 times that of normal carbon steel, and coating performance is 1.5 to 10 times that of normal carbon steel. At the same time, it has the characteristics of rust resistance, corrosion resistance and longevity of components, thinning and consumption reduction, and labor and energy saving.
Q355GNH Mechanical properties
Grade |
Thickness |
Yield strength |
Tensile strength |
Elongation % |
|
GB/T 4171 Q355GNH |
≤16 |
355 |
490-630 |
22 |
|
16-40 |
345 |
22 |
Grade Q355GNH atmospheric corrosion resisting structural steel is mainly used for steel structures exposed to the atmosphere for a long time, such as railways, vehicles, bridges, and towers. It is also used to manufacture structural parts such as containers, railway vehicles, oil derricks, seaport buildings, oil production platforms, and containers containing hydrogen sulfide corrosive medium in chemical and petroleum equipment.
