ASTM A653 is a standard specification for steel sheets coated with zinc or zinc-iron alloy by the hot-dip process, providing corrosion resistance. These galvanized or galvannealed steel sheets find applications in building products, ductwork, appliances, furniture, and automotive components where some atmospheric corrosion protection is required. The standard covers chemical composition, mechanical properties, coating weight requirements, and grades/classes suitable for the intended use.