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.
Galvannealed steel sheet properties.
Has no protective film.
However galvannealed steel goes through an additional annealing process which induces diffusion alloying between the molten zinc coating and the steel.
Meets astm a653 09 specifications requirements.
May have minor scratching.
Galvanneal is similar to other galvanized steels.
Galvannealed steel grade data sheet galvannealed steel hot dip zinc iron coated structural steel annealed with guaranteed minimum yield strength.
They both are zinc coated at the mill and are designed for rust and corrosion resistance.
Design must allow for some strength reduction near welds.
In order to create galvanneal steel the material is run through a liquid bath of zinc alloy.
Galvannealed steel has very similar properties as standard galvanized but the surface has a more porous and abrasive finish that more readily accepts paint.
This zinc adheres to the surface without any large changes to the metallurgical properties of either the zinc layer or the steel.
The hot dip process pioneered by ak steel provides a tight metallurgical bond between the steel and coating.
Both are passed through a hot dip coating process.
Galvannealed steel hot dip zinc iron coated structural steel annealed with guaranteed minimum yield strength.
Hot rolled galvannealed steel is derived from the temperature of the alloy when it is rolled into a sheet.
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.
Best use is for painted applications.
Galvannealed or galvanneal galvannealed steel is the result from the processes of galvanizing followed by annealing of sheet steel.
Can be painted in the as shipped condition.
Meets astm a653 09 specifications requirements.
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.
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.
At times the galvannealed coating may appear similar to uncoated cold rolled steel.
Galvannealed steel is a matte uniform grey color which can be easily painted.
This is preferred over galvanized if the metal is to be painted.
It is perhaps most similar to hot dip galvanizing.
Light grey matte finish.
This allows for the galvannealed steel to be more ductile and flexible.
In comparison to galvanized steel the coating is harder and more brittle.
