A588 atmospheric corrosion resistant steel

Weathering steel, that is, atmospheric corrosion-resistant steel, is a low-alloy steel series between ordinary steel and stainless steel. Weathering steel is made of ordinary carbon steel with a small amount of corrosion-resistant elements such as copper and nickel. It has the toughness and plasticity of high-quality steel. Extension, forming, welding and cutting, abrasion, high temperature, fatigue resistance and other properties; weather resistance is 2~8 times that of ordinary carbon steel, and paintability is 1.5~10 times that of ordinary carbon steel. At the same time, it has the characteristics of rust resistance, corrosion resistance and life extension of components, thinning and consumption reduction, labor saving and energy saving.

Weathering steel is mainly used for steel structures exposed to the atmosphere for a long time, such as railways, vehicles, bridges, towers, photovoltaics, and high-speed projects. Used in the manufacture of containers, railway vehicles, oil derricks, seaport buildings, oil production platforms, and containers containing hydrogen sulfide corrosive media in chemical and petroleum equipment.

It is characterized in that: the alloy composition and weight percentage content of the weathering steel are: C: ≤0.12, Si: 0.25-0.75, Mn: 0.2-0.5, S ≤0.02, P: 0.06-0.12, Cu: 0.25-0.5, Cr: 0.3~1.25, Ni: 0.12~0.65, the rest are Fe and trace elements. Through the alloying of Cu, Mn, Si, Al, etc., and simply adjusting the content of some elements in ordinary low-carbon steel (Q235 steel), it can produce good atmospheric corrosion resistance without changing the production process of Q235 steel. , Economical weathering steel with comprehensive mechanical properties.