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