Galvalume Steel Coil

Product details

One of the most popular applications of Galvalume steel is for outdoor metal paneling and roofing. Galvalume is used because it has superior resistance to corrosion in outdoor environments than standard galvanized steel. It is able to resist corrosion when exposed to snow, ice, and rain

What is the Difference Between Galvanizing and Galvalume?

The main difference between galvanizing and Galvalume is that galvalume is a combination of zinc, aluminum, and silicon, while galvanizing is 100% zinc. The makeup of the three elements in a Galvalume coating is just over 50% aluminum, just under 50% zinc, with trace amounts of silicon.

An advantage that Galvalume has over normal galvanized material is that it has enhanced protection abilities. Over time, Galvalume tends to perform better than galvanized steel, especially when exposed to water or other liquids that can speed up the oxidation process. Even after a few decades, Galvalume-coated steel will be less likely to rust than normal galvanized steel.

Galvalume is also considered more aesthetically pleasing than hot-dipped galvanized materials.

Prepainted Galvalume steel coil: properties and applications

Prepainted Galvalume steel coils are Galvalume steel coils that have been further processed with a pre-applied paint coating. The Galvalume steel substrate provides excellent corrosion resistance, while the pre-painted coating enhances the aesthetic appeal and adds additional protection.

The prepainting process involves applying a layer of paint to the Galvalume steel coils through a continuous coil coating line. The coils are first cleaned and treated to ensure proper adhesion of the paint. Then, a primer is applied to enhance adhesion and provide a smooth base for the topcoat. Finally, a topcoat of paint is applied, which can be in a wide range of colors and finishes.

Prepainted Galvalume steel coils offer several advantages. They combine the corrosion resistance and durability of Galvalume steel with the versatility and aesthetics of the pre-painted finish. The pre-applied paint provides an additional layer of protection against environmental elements, such as UV radiation and moisture, while also allowing for customization in terms of color and design.

We mainly sell AZ50, AZ55, and AZ150 galvalume steel coils. AZ50 and AZ55 are ASTM A792 standard coating designations, meaning weights of 0.50 ounces/square foot and 0.55 ounces/square foot. AZ150 is a coating designation according to EN 10346 standard, which means the weight is 150g per square meter.

AZ50 is equivalent to AZ150;

AZ55 is equivalent to AZ165;