Galvalume Steel Metal

Suppliers From South Africa

Coating: The composition of the Galvalume sheet coating is typically 55% aluminum, 1.6% silicon, and the balance zinc, nominal percentages by weight.

The product is described in ASTM Specification A 792 and is available in three coating weights:

ASTM Designation AZ50 AZ55 AZ60
Triple Spot Average Minimum oz/sq ft 0.50 0.55 0.60
- Single Spot Minimum oz/sq ft 0.43 0.50 0.52
22-26 gauge
42, 48
Coil/Sheet/Strip

Coating Composition: Galvalume coatings typically consist of approximately 55% aluminum, 43.5% zinc, and 1.5% silicon by weight. This combination of elements provides excellent corrosion resistance.
Corrosion Resistance: Galvalume steel is highly corrosion-resistant, even in challenging environments such as coastal areas with saltwater exposure. The aluminum in the coating acts as a protective barrier, while the zinc provides galvanic protection to the underlying steel substrate.
Durability: Galvalume-coated steel is known for its durability and long lifespan. It can withstand exposure to the elements and resist rusting and corrosion over time.
Heat Reflectivity: Galvalume steel has good heat reflectivity, which makes it suitable for roofing applications. It can help keep buildings cooler in hot climates by reflecting sunlight and reducing heat absorption.
Appearance: Galvalume-coated steel typically has a shiny, metallic appearance that can vary in color from a silvery gray to a bluish tint.