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topic 8539

Galvanized and Galvanneal Sheet Steel



2001

What is the difference between Galvanized and Galvaneal sheet steel? Which will last longer under conditions of water and heat exposure?

Donna Linzey
Vulcan-Hart Co. - Baltimore, Maryland

affil. link
Galvanized Trash Can


2001

Galvanize & galvanneal are very similar. Both are produced using a hot dip process. In fact, the same production line may produce both products. Galvanneal is merely galvanize which has been annealed. The annealling furnace is down stream from the zinc bath. Turn off the furnace and you produce galvanize. Turn on the furnace and galvanize is turned into galvanneal. Galvanneal has a dull grey smooth surface. It is used for painted applications. Galvanize has a bright zinc crytyline surface. Like galvanize garbage cans.

The zinc protection for both products depends on it's thickness. Ninety ounces per square foot, would give more protection than sixty ounces. These coating may be designated G90 & G60.

Terry T. Magyar
Berwick Steels - Gahanna, OH usa

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