GI Steel Coil GI steel coil have a very strong corrosion resistance and long use life. ... -spangleSurface TreatmentChromate, Oil, Lacquer Seal, Phosphating, etc Application:GI steel coil products are mainly used in construction, light industry, auto industry, agriculture, animal ... I-Beam, Channel, Angle, H-Beam, C-Beam, Galvanized Steel Coil, Hot Rolled Steel Plate, Cold Rolled Steel Plate, Mild Steel ...