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Product Information
What is Galvalume® and Galvalume Plus® Galvalume® is the name of the coating applied to bare sheet steel products that acts as a two-punch barrier to the elements. It is comprised of 55% aluminum, 1.6% silicon and 43.4% zinc. The coating is applied to the base metal in a continuous hot dip method. The product is described in ASTM-792, coating classes of AZ 50, AZ 55 and AZ 60. These classes equate to an average minimum coating thickness of .50, .55 and .60 ounces per square foot.
Why is Galvalume® better than galvanized coated steel sheets? After 23 years of continuous exposure to the real world of: severe marine, agricultural, industrial and rural environments Galvalume® proved more durable than comparably coated G-90 galvanized steel products. (G-90 = .9 oz. coating per sq. ft. of zinc) It actually out performed G-90 galvanized products in the same environments by two to four times. In other words, they resisted corrosion that much better.
Would a Galvalume® panel feel lighter than a G-90 galvanized panel? Remember that the Galvalume® coating is comprised of 55% aluminum which is half the weight of steel by volume. So, two ten foot sheets of identical panels; one coated with Galvalume® and one coated with G-90 galvanized, the galvanized panel would weigh approximately six tenths of an ounce (.6 oz) more. The galvanized coating being heavier in weight only.
What is Aluminum -a silvery white and ductile member of the boron group of chemical elements. It has the symbol Al; its atomic number is 13. It is not soluble in water under normal circumstances. Aluminium is the most abundant metal in the Earth's crust, and the third most abundant element therein, after oxygen and silicon. It makes up about 8% by weight of the Earth’s solid surface. Aluminium is too reactive chemically to occur in nature as the free metal. Instead, it is found combined in over 270 different minerals.The chief source of aluminium is bauxite ore. Aluminium is remarkable for its ability to resist corrosion (due to the phenomenon of passivation) and its low density. Structural components made from aluminium and its alloys are vital to the aerospace industry and very important in other areas of transportation and building. Its reactive nature makes it useful as a catalyst or additive in chemical mixtures, including being used in ammonium nitrate explosives to enhance blast power.