What are the differences between Q355NH steel and Q355GNH steel

Q355NH is a weather resistant structural steel. It is a low-alloy steel series between ordinary steel and stainless steel. It is made of ordinary carbon steel with a small amount of corrosion-resistant elements such as copper and nickel. Q355NH steel has the strength, ductility, forming, abrasion, high temperature, fatigue resistance and other characteristics. The weather resistance of Q355NH weather resistant steel plate is 2-8 times that of ordinary carbon steel, and the coating property is 1.5-10 times that of ordinary carbon steel. Q355NH weather resistant steel plate is mainly used in railway vehicles, bridges, towers and other structures exposed to the atmoSPHEre for a long time.

Q355GNH weather resistant steel plate is a steel that adds a small amount of alloying elements such as Cu, P, Cr, Ni, etc. to form a protective layer on the surface of the metal substrate to improve the resistance to atmospheric corrosion. Q355GNH weather resistant steel plate has the characteristics of high-quality steel such as strength, toughness, ductility, forming, welding, abrasion, high temperature, fatigue resistance, etc.. Q355GNH weather resistant steel plate has the characteristics of rust resistance, corrosion resistance and longevity of components, thinning and consumption reduction, and labor and energy saving.

The performance and composition of Q355GNH are better than Q355NH, and the price is higher.

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