The steel is self-protecting:the rust layer on the surface becomes a tight oxide layer that slows down the progress of corrosion. The steel is an economical, long-lasting and fully recyclable material. 2.Corrosion resistant steel - Weathering Steel . Weathering steel is a Anti-corrosion steel for Container cost_Corten metal Coil :Spec (mm) Plate:Characteristic :Application Area :Anti-corrosion steel for container:SPA-H A242M Type1 SMA400 SMA490 SMA570:GIS G 3125 Technical Agreement:1.5-19mm:6-100mm:Atmospheric corrosion resistance of high strength hot rolled steel plates. mainly used for body of Container, Cabinet.