... explosion proof.Grade: Corten a and b, SPA-H, SPA-C, Q235NH, Q295NH, Q355NHThis steel series include corten sheet, corten coil ... wall, cold-formed, high strength, weathering, seamed and seamless steel tube, which are applied in the globe truss of ... shipping container, ship, train, bus and support frame of outside building on coastal area etc Weathering and anticorrosive Steel NH weldable and corten