Galvannealed Steel Sheet Properties

Galvannealed steel has very similar properties as standard galvanized but the surface has a more porous and abrasive finish that more readily accepts paint.

Galvannealed steel sheet properties. Galvannealed or galvanneal galvannealed steel is the result from the processes of galvanizing followed by annealing of sheet steel. At times the galvannealed coating may appear similar to uncoated cold rolled steel. Design must allow for some strength reduction near welds. This is preferred over galvanized if the metal is to be painted.

Both are passed through a hot dip coating process. This zinc adheres to the surface without any large changes to the metallurgical properties of either the zinc layer or the steel. Light grey matte finish. Can be painted in the as shipped condition.

Carbon sheet steel with a zinc coating both sides that has been heat treated to form an iron zinc alloy layer underneath the zinc and on top of steel. In order to create galvanneal steel the material is run through a liquid bath of zinc alloy. Galvannealed steel is a specialized variation of galvanized steel where induction heating is used to alloy the zinc coating with the steel to create a zinc iron coating. Best use is for painted applications.

Meets astm a653 09 specifications requirements. Galvannealed steel hot dip zinc iron coated structural steel annealed with guaranteed minimum yield strength. Galvannealed steel is a matte uniform grey color which can be easily painted. The iron diffuses from the steel into the coating the galvannealed surface has a non spangled matte finish a finish very different than the highly metallic appearance of the galvanized coating.

Hot rolled galvannealed steel is derived from the temperature of the alloy when it is rolled into a sheet. This allows for the galvannealed steel to be more ductile and flexible. Class 1 mechanical properties chemical composition. Steel base guaranteed typical range guaranteed maximum percent longitudinal tensile carbon c 0 25 yield strength minimum ksi 80 80 117 phosphorus p 0 04 tensile strength minimum ksi 82 82 120.

Hot rolled steel is steel that has been heated above its recrystalization point and is pushed between two rollers to meet a certain length and thickness. May have minor scratching. Galvanneal is similar to other galvanized steels. In comparison to galvanized steel the coating is harder and more brittle.

Galvannealed steel grade data sheet galvannealed steel hot dip zinc iron coated structural steel annealed with guaranteed minimum yield strength. The hot dip process pioneered by ak steel provides a tight metallurgical bond between the steel and coating. Meets astm a653 09 specifications requirements. However galvannealed steel goes through an additional annealing process which induces diffusion alloying between the molten zinc coating and the steel.

One of the primary attributes of the galvannealed coating is that the. They both are zinc coated at the mill and are designed for rust and corrosion resistance.