Galvanized Sheet Metal Vs Aluminum

The combination of aluminum and zinc is used once again as a protective layer to the steel.

Galvanized sheet metal vs aluminum.

The zinc acts as a protective layer to iron or steel to prevent rust. At wenzel we take pride in making high quality parts and use only g90 galvanized sheet meaning there is 90 ounces of zinc coating per square foot or steel sheet. Galvannealed steel is the preferred coated steel for use in architectural applications. Galvalume is aluminum and zinc coated steel.

This is known as a galvanized metal. The aluminum is added to improve the adhesion between the coating and the steel substrate during formation. Specification astm a 653 a 653m coating designation a a60 a40 galvanized steel zinc coated by the hot dip process resulting in a full spangled finish galvanized steel is less conducive to forming welding and painting. Galvanized steel is essentially pure zinc with a very small percentage of aluminum.

If we compare galvanized and aluminium steel for facade construction steel with zinc plating and aluminum alloy sheets are the closest competitors. Galvanized steel has better corrosion resistance. G90 is the best thickness for spinning and the industry standard for coating astm a653. But nevertheless steel sheet has advantages.

At the same thickness steel is 2 5 3 0 times stronger. Galvanized steel has a porous and rough surface which is difficult to clean.