GI Steel Coil GI steel coil have a very strong corrosion resistance and long use life. StandardAISI, ASTM, BS, DIN, GB, JIS, etcGradeSGCC, DX51D, DX53D, DX54D, etcThickness0.15 ... spangle, non-spangleSurface TreatmentChromate, Oil, Lacquer Seal, Phosphating, etc Application:GI steel coil products are mainly used in construction, light industry, auto industry ...