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Resistance to corrosion
Al-Zn coated steel sheet has better performance in corrosion resistance than GI sheet of the same thickness and its service life is 1-5times longer than general GI sheet.
Common HDG steel plate normally works under 230℃, and has its color changed at 250℃, however, Galvalume steel sheet can sustain the environment at 315℃ for long time.
Reflection ability of heat and light is twice as much as those of hot dip galvanized steel sheet, and its reflectivity is more than 0.75, exceeding 0.65(required by the EPA Energy Star Standard), which is an ideal construction materials of saving energy.