The galvalume steel sheets is a kind of coated steel with the cold rolled steel, it is produced through applying alum-zinc coat on both faces by hot dip process.Alum accounts for 55%, Si 1.6%, and Zn 43.4%. Its surface has bright silver color and regular embossed-like figure, which are highly decorative. So it has a better performance in corrosion resistance than galvanized steel sheets.                          The company now has three lines of GL,the designed capacity total 500000 tons with the specification of 0.14-1.2mm thickness and 750-1250 mm width. They are widely used for roofings and outside walls of civilian and industiral buildins ect.