Galvanealed Sheet Metal

However the zinc alloy coating on galvannealed sheet is more brittle than the zinc coating of galvanized sheet.

Galvanealed sheet metal. Galvannealed steel sheet metal also known as galvanneal is the result of galvanizing followed by annealing of sheet steel. We are metal experts and have been providing quality customer service and products. As a result some amount of powdering can appear when the metal is formed. For example a40 tells you that the metal contains 0 40 ounces of coating per square foot.

With its shiny zinc appearance galvanized is the most common cost effective corrosion resistant metal for hvac. In comparison to galvanized steel the coating is harder and more brittle. G60 has 0 60 ounces of. The resulting finish is a dull matte surface.

In comparison to galvanized steel the coating is harder and more brittle. Galvannealed steel zinc iron alloy coated by the hot dip process followed by heating the steel to induce diffusion alloying between the molten zinc coating and the steel. Galvannealed steel is a matte uniform grey color which can be easily painted. Galvanealed is actually worked into the metal and more effective.

March 14 2016 at 11 09 pm thanks whitney. Advantages and disadvantages of galvanneal. Our galvanized sheet metal is g60 and we use a40 galvanneal. Galvannealed is cold rolled carbon steel coated with zinc iron alloy on both sides.

This is achieved through a multi step process where a steel sheet is immersed in pure molten zinc at a very high temperature bonding the zinc to the steel. Galvannealed steel has a matte grey color uniform which can be easily painted. Galvannealed or galvanneal galvannealed steel is the result from the processes of galvanizing followed by annealing of sheet steel. For both galvanized and galvannealed sheet metal we use commercial grade cs b stock.

The zinc iron coating weight is denoted with an a40 or a60 which means 40 or 60 oz sq ft. The number in that code refers to the thickness of the zinc coating on the product. Serving the sheet metal industry in the southeast since 1874 material specification sheet galvanneal steel description galvanneal is a carbon steel coated with zinc on both sides by a continuous hot dip process. The galvannealed steel is then cut into specified dimensions.

Galvannealed sheet can be formed much in the same way and by the same variety of processes as galvanized sheet. Galvannealed steel is very conducive to forming welding and allows for excellent paint adhesion. As the metal strip exits the coating bath the zinc is subjected to an in line heat treatment that converts the entire coating to a zinc iron alloy giving the sheet improved surface finish so it can be painted. It can be painted sooner but not without a pretreatment.