What is the 09CuPCrNi-A weathering steel brief introduction？

09CuPCrNi-A weathering steel is a kind of high-strength weathering steel that can be produced. Cu and P are combined to resist atmospheric corrosion. In addition, there are Cr and Ni, both of which are used in stainless steel.
09CuPCrNi-A belongs to weathering steel. Weathering steel (that is, atmospheric corrosion resistant steel) is a low-alloy steel series that is between ordinary steel and stainless steel at a low price. Continuous development and innovation are one of the series of steel grades at the forefront of the world's super steel technology.

Weathering steel is made of ordinary carbon steel with a small amount of corrosion-resistant elements such as copper and nickel. It has the characteristics of high-quality steel such as strength, ductility, forming, welding, abrasion, high temperature, fatigue, etc.; weather resistance is 2~ 8 times of ordinary carbon steel, the coating performance is 1.5-10 times that of ordinary carbon steel, which can be used in thinner, bare or simplified coating.

09CuPCrNi-A weathering steel has the characteristics of rust resistance, corrosion resistance and longevity of components, thinning and consumption reduction, labor-saving and energy-saving characteristics, which benefit component manufacturers and users. 09CuPCrNi-A is an economic weathering steel with good atmospheric corrosion resistance and comprehensive mechanical properties. Mainly used for steel structures exposed to the atmosphere for a long time, such as railways, vehicles, bridges, and towers.