Metal Material Types: How to Choose the Best Material for ...
Bethlehem Steel introduced the Galvalume coating to the construction industry in the early 1970s. Galvalume roofing material combines three of the most important metals used in roofing today—steel aluminum and zinc.Manufacturers begin with a carbon steel base sheet which is then continuously hot-dipped with aluminum and zinc alloys until it reaches a coating consisting of 55% aluminum…
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