Weathering steel is a type of weathering steel (ie, atmospheric corrosion resistant steel), and weathering steel plates can be used as exterior wall materials. The main technical support point is that weathering steel has superior corrosion resistance compared with ordinary steel. Under the natural climate, the steel corrodes and thins by more than 0.1~1mm within 5 years, and the thinning is more serious for a long time or in special and man-made harsh environments. Weather-resistant steel (take WISCO products as an example) by adding weather-resistant elements such as copper, chromium, and nickel, the steel forms a dense layer of about 50-100 μm thick between the rust layer and the substrate and adheres to the base metal. good oxide layer. This special dense oxide layer has a stable, uniform natural rust red color.
Weathering steel, characterized in that the alloy composition and weight percentage of the weathering steel are: C≤0.12, Si: 0.25-0.75, Mn: 0.20-0.50, P: 0.07-0.15, S≤0.03, Cu: 0.25- 0.55, Cr: 0.30～1.25, Ni≤0.65, the rest are Fe and trace impurities. Mainly used in railways, vehicles, bridges, towers and other steel structures exposed to the atmosphere for a long time. Through the alloying of Cu, Cr, Ni, etc., simply adjusting the content of some elements of ordinary low carbon steel (Q235 steel), without changing the production process conditions of Q235 steel, good atmospheric corrosion resistance can be produced, comprehensive economical Mechanical properties of weathering steel.

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