The melting analysis of chemical composition of high weathering steel Q355GNH hot rolled steel sheet (regular C, Si, Mn, S, P and Tu, Cr) is more rigorous than that of the corresponding grade of high strength structural steel with low alloy, especially the low content of element C, S and P.
In order to improve the performance of Q355GNH steel, several trace alloy elements, such as Ni, Nb, V, Ti, Mo, Zr and AI, are added to the composition of Q355GNH hot rolled steel sheet to form a protective layer on the surface of the metal matrix, so as to improve the atmospheric performance. Q355GNH steel sheets shall be delivered hot rolled or normalized condition.
Q355GNH hot rolled steel sheet application: Mainly used in vehicles, containers, buildings, towers or other structural parts of the long-term exposure to the use of steel structure in the atmosphere. Q355GNH hot rolled steel sheet is used to manufacture containers, railway vehicles, oil derrick, harbor construction, oil production platform and containers containing hydrogen sulfide corrosive medium in chemical and petroleum equipment.