Galvanized steel coil is a type of steel coil that has been coated with a layer of zinc to protect it from corrosion. It is commonly used in a variety of industries, including construction, building, light industry, automobile, agriculture, animal husbandry, fishery, and commerce. The thickness of galvanized steel coil can range from 0.11 to 30mm, while the width can range from 40 to 1250mm. The zinc coating typically ranges from 30 to 275g/㎡, while the grade can be SGCC, CGCC, or DX51D. The ASTM A36 and JIS G3302 standards are commonly used to specify the quality of galvanized steel coils.