S220GD-S550GD Galvalume Steel Coils

The galvalume coating is an alloy consisting of approximately 55% aluminum, 43.4% zinc and 1.5% silicon by weight, which is applied to steel by the continuous hot dip process. Galvalume steel sheet offers the best qualities of aluminum coated (aluminized) and zinc coated steel sheet (galvanized). The aluminum/zinc coating has barrier corrosion resistance and heat resistance similar to aluminum coated steel. It also has good bare edge galvanic protection and forming qualities similar to continuously annealed commercial quality galvanized. The appearance of Galvalume coating is quite distinctive. Its smooth, flat and fine spangle and a silvery metallic appearance make it attractive in unpainted applications.

Galvalume Specifications ASTM A792 / A792M 

Aluzinc Steel Coil Process

Decoiling – Cleaning – Annealing – Zinc pot – Cooling – Air knife – Straightening – Post-treatment – Coiling

 FEATURES OF ALUZINC STEEL COIL    

1. Superior long term corrosion resistance allows aluzinc steel coils to outperform galvanized coating by 2 to 6 times

   
   

2.The density of 55% aluminum is smaller than that of zinc. With the same weight and thickness of the plating layer,the area of the galvalume steel sheet is 3% or larger than that of a galvanized steel sheet.