Product Overview
Galvalume Steel Coils are premium coated steel products designed to
deliver superior corrosion resistance and long-term durability. The
steel substrate is hot-dip coated with an advanced aluminum-zinc
alloy consisting of 55% aluminum, 43.5% zinc, and 1.5% silicon, forming a robust barrier against rust and oxidation. Available in
a wide range of sizes with thicknesses from 0.12mm to 4.0mm and widths from 30mm to 1500mm, these coils offer excellent performance in demanding
environments. Their bright, metallic appearance and smooth surface
finish make them ideal for exposed applications such as roofing,
cladding, and decorative panels.
Technical Specifications
| Item | Details |
|---|
| Product Name | Galvalume Steel Coil |
| Thickness Range | 0.12mm – 4.0mm |
| Width Range | 30mm – 1500mm |
| Coating Weight | AZ30 – AZ150 |
| Surface Treatment | Chromated / Oiled / Dry / AFP |
| Tensile Strength | 270 – 550 MPa |
| Coil Weight | 3–10 tons per coil |
| Surface Appearance | Regular Spangle / Bright Finish |
| Standard | ASTM A792 / JIS G3321 |
| Application | Construction, Appliances, etc. |
Key Features and Benefits
Galvalume steel provides exceptional corrosion resistance, especially in coastal or industrial environments. The aluminum
content offers excellent heat and oxidation resistance, while the zinc provides cathodic protection when the coating is damaged. This dual-action protection extends
the lifespan of the steel, often exceeding twice the durability of standard galvanized steel. Its smooth surface ensures good paint adhesion, and the material is easily
processed—cut, formed, and welded without flaking or cracking.
Moreover, its attractive silvery appearance is suitable for both functional and decorative applications.
Applications and Technology
Galvalume Steel Coils are widely used in roofing sheets, wall claddings, structural framing, electrical
enclosures, automotive parts, and HVAC equipment. The coating process involves hot-dip metallurgical bonding, where the steel coil passes through a bath of molten
aluminum-zinc alloy. This forms a tightly adherent,
corrosion-resistant layer that combines the barrier effect of aluminum with the sacrificial protection of zinc. The presence of silicon improves adhesion between the coating and
the base metal, preventing peeling during fabrication. This
advanced coating technology ensures reliable performance even in
harsh environments, making Galvalume coils a cost-effective and
high-performance choice for modern engineering and construction.
