Q355GNH steel plate is weather resistant steel plate that improves atmospheric corrosion resistance by adding 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. Q355GNH steel plate has the characteristics of high quality steel in terms of strength and toughness, plastic elongation, forming, welding and cutting, abrasion, high temperature and fatigue resistance. At the same time, Q355GNH steel plate has the characteristics of rust resistance, corrosion resistance and longevity of components.
Q represents the yield strength, 355 represents the lower limit of the lower yield strength of steel, the unit is N/mm². GNH represents the high weather resistance.
Chemical composition of Q355GNH steel plate
C: 0.12 Si: 0.2-0.75 Mn: 1.0 P: 0.07-0.15 S: 0.02 Cr: 0.3-1.25 Ni: 0.65 Cu: 0.25-0.55
Q355GNH steel plate is mainly used for steel structures that are exposed to the atmosphere for a long time, such as vehicles, containers, buildings, towers or other structural parts. It 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 and petroleum equipment.
