Q355GNH high weather resistance structural steel description
Standard: GB/T 4171-2008
Grades: Q355GNH
GB/T 4171 Q355GNH grade is a high weather-resistant structural steel. We can supply various Q355GNH steel products like steel plates, thin sheet, steel coils and steel sections with high quality. Compared with Q355GH welded weather-resistant steel, they have better atmospheric corrosion resistance.
Chemical composition of Q355GNH steel
Grades |
chemical composition/% |
|
C |
Si |
Mn |
P |
S |
Cr |
Cu |
Ni |
|
Q355GNH |
≤0.12 |
0.25-0.75 |
≤1.0 |
0.07-0.15 |
≤0.020 |
0.3-1.25 |
0.25-0.55 |
≤0.65 |
Mechanical properties of Q355GNH steel
Grades |
Yield strength/MPa |
Tensile strength/MPa |
Elongation/% |
|
Q355GNH |
≥355 |
490-630 |
≥22 |
Features of Q355GNH steel plate:
1. Weather-resistant steel plate is a kind of atmospheric corrosion-resistant steel, a low-alloy steel between ordinary steel and stainless steel.
2.Weather-resistant steel plate is made of plain carbon steel with a small amount of corrosion-resistant elements such as copper and nickel.
3. The performance of weather-resistant steel plate has the properties of high-quality steel such as toughness, ductility, forming, welding and cutting, abrasion, high temperature, fatigue resistance, etc.; weather resistance is 2-8 times that of normal carbon steel, and coating performance is 1.5 of that of normal carbon steel. ~10 times.
4. Features of weather-resistant steel plate: It has the characteristics of rust resistance, corrosion resistance and life extension, thinning and consumption reduction, and labor and energy saving.
Q355GNH high weather resistance structural steel is 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 petroleum equipment.
