... 316.321.310S.410.430.2205 etc, Size:2.5#--10# surface:pickled,polished,black ProductStainless steel angle barAnother NameHot rolled stainless steel ... ,309S,309H,310,310S,410,420,430,2205 etcStandardANSI/ASTM/SUS/GB/DIN/EN/BSSurfaceHRAP , hot rolled pickled , polished ... all kinds of architecture and engineering structure, such as the beam, Bridges, transmission tower, hoisting, ship, industrial furnace, ...