Galvalumed steel coil is aluminum zinc alloy structure of aluminum 55%, zinc and 43.4% from 1.6% silicon at 600 ℃ high temperature solidification and composition, its whole structure by aluminum - iron - silicon - zinc, forming dense alloy of crystal.★Features editor:Galvalumed steel has many excellent characteristics: strong corrosion resistance, three times of pure zinc plating; With beautiful zinc flowers on the surface, it can be used as an outdoor board for buildings. ★Corrosion resistance:The corrosion resistance of " Galvalumed steel coil" is mainly due to the protection function of aluminum. When zinc is worn, aluminum forms a dense layer of alumina, preventing further corrosion of the corrosion-resistant material inside. ★Heat resistance:Galvalumed steel has good heat resistance and can withstand temperatures of more than 300 degrees Celsius Chimneys, ovens, illuminators, and solar lampshades. ★Heat reflective:Galvalumed steel, which is often used as an insulating material, has a high thermal reflectance, twice that of galvanized steel. Since the density of 55% al-zn is smaller than that of Zn, the area of aluminum and zinc plated steel is more than 3% larger than that of plated steel with the same weight and the same thickness. GL Steel Price is better than GI.