What are the functions of Q355NH weathering steel plate?

As a new generation of advanced steel, Q355NH weathering steel plate has an atmospheric corrosion resistance 2 to 5 times that of ordinary carbon steel. The longer it is used, the more prominent its corrosion resistance. Due to its corrosion resistance, no coating, thinning, lower consumption, labor and energy saving, it can be used for steel structures exposed to the atmosphere for a long time, such as buildings, vehicles, bridges and towers, and can also be used to manufacture structural components, such as containers , railway vehicles, oil derricks, port buildings, oil production platforms, etc.

Q355NH weathering steel plate has good atmospheric corrosion resistance, in which alloying elements play a decisive role, including hindering the growth of embroidery layer. Delay embroidery; obstacles to the crystallization of cracks and defects. Carbon is not conducive to the atmospheric corrosion resistance of steel. Affect welding, cold brittleness and stamping performance.

The carbon content in weathering steel is controlled below 0.12%. Copper is resistant to atmospheric corrosion. Copper forms an impermeable layer on the steel substrate, but copper forms an intergranular effect between crystals, which is prone to cracks. Phosphorus is one of the main elements to improve atmospheric corrosion resistance.