... S275JR, SS304, Mild steel & Low carbon steel, etc5Surface TreatmentBlack, self colour, hot dip galvanized, painted, spray coating 6Grating ... Japan:JIS 2)Application:platform, flooring walkway,steel structures, stair tread, well cover, trench cover ... and handrail so on for construction project, oil project, seaport, power plant, water plant, defense project, chemical factory and so on. galvanized steel ...