Why is Galvalume sheet called by other names? Are all of these products the same?
The product is a 55% aluminum-45% zinc alloy coated sheet steel developed by Bethlehem Steel and sold commercially under the trademark Galvalume, starting in June 1972. Bethlehem Steel later licensed other major steel companies to produce and sell the product using its patents and technology. In North America, the Galvalume trademark is used by Bethlehem Steel, Dofasco Inc. (Canada), National Steel Corp., U.S. Steel and Wheeling-Nisshin, Inc. In Central and South America, Industrias Monterrey (Mexico) markets the product under the trademark Zintro-Alum, while Galvak S.A. de C.V. uses the trademark Galval. Steelscape, Inc. uses the trademark ZINCALUME. All of these products are the same generic 55% Al-Zn coated shee steel made by the same process using the same technology. How is it made? Both Galvalume and galvanized sheet steels are made by a “continuous hot dip” process. Coils of cold rolled steel are welded end-to-end and processed continuously on the coating line at speeds up to 60
