Q355GNH high weathering steel concept
Q355GNH is a high weathering steel, also known as atmospheric corrosion resistant steel. The "Q" in its name represents the yield strength, the "355" indicates that its yield strength is not less than 355 mpa, and the "GNH" represents the specific chemical composition and performance requirements. This steel by adding a small amount of alloying elements, such as copper (Cu), phosphorus (P), chromium (Cr), nickel (Ni), etc., to improve its atmospheric corrosion resistance.
Q355GNH high weathering steel features
High strength: Q355GNH has high yield strength and tensile strength, which can meet the needs of various engineering structures.
Excellent weather resistance: Its special chemical composition and surface coating enable it to maintain stable performance under various climatic conditions, and its weather resistance is 2 to 8 times that of ordinary carbon steel.
Good welding performance: Q355GNH is easy to weld, and the welding quality is stable and reliable.
Environmental protection: Environmental protection coating is used in the production process to reduce environmental pollution.
Beautiful: uniform surface coating, beautiful color, with good decorative effect.
Q355GNH high weather tempering chemical composition
The chemical composition of Q355GNH mainly includes carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), copper (Cu), chromium (Cr), nickel (Ni) and other elements, the specific content is as follows:
Carbon (C) : ≤0.12%
Silicon (Si) : 0.20~0.75%
Manganese (Mn) : ≤1.00%
Phosphorus (P) : 0.07~0.15%
Sulfur (S) : ≤0.020%
Copper (Cu) : 0.25~0.55%
Chromium (Cr) : 0.30~1.25%
Nickel (Ni) : ≤0.65%
Q355GNH high weathering steel application range
Q355GNH has been widely used in many fields due to its excellent mechanical properties and weather resistance:
Bridge engineering: As the main structural material of Bridges, Q355GNH can effectively resist wind and rain erosion and extend the service life of Bridges.
Building engineering: In the construction sector, Q355GNH can be used on roofs, walls and floors to improve the durability and safety of buildings.
Vehicle manufacturing: In the manufacture of vehicles such as cars and trains, the Q355GNH can effectively improve the corrosion resistance of vehicles.
Container manufacturing: In container manufacturing, Q355GNH has good rust resistance and high strength, which can ensure the safe transportation of containers.
Other fields: Q355GNH can also be used in petrochemical, electric power, environmental protection and other fields, for the manufacture of a variety of corrosion resistant, high temperature resistant equipment and components.
