SMA490BW steel plate is a kind weathering steel which under JIS G3114 standard.As the weathering steel,SMA490BW steel plate is mainly used in vehicle,bridge,tower,container and so on.jis sma490cw weather steel for bridge JIS G 3114 SMA400AP weather steel for bridge for sale. sma490aw pdf - LAB STEELjis sma400ap carbon equivalent Steel Sales A588 Corten .jis sma490aw corten steel factory SMA490BP|SMA490BP STEEL PLATE__Steel SupplierSMA490BP is a weather resistant steel created by alloying copper, chromium and nickel. SMA490BP has added phosphorous which makes the material best suited for gas flue applications. and for aesthetic facias . Thickness:6mm to 300mm. Width:1500mm to 4050mm. Length:3000mm to 15000mm.