0.12–4.0mm Thickness AZ150 Coating Galvalume Steel Coils Silver Surface For Roofing And Wall Panels

Product Introduction

Galvalume Steel Coils are high-performance steel sheets coated with an alloy of approximately 55% aluminum, 43.5% zinc, and 1.5% silicon. This unique coating combines the corrosion resistance of aluminum with the galvanic protection of zinc, delivering exceptional durability and longevity even in the most challenging environments. With a sleek, silvery finish and excellent formability, Galvalume steel is widely used in construction, appliance manufacturing, and automotive components. We offer coils in thicknesses ranging from 0.12mm to 4.0mm and widths from 30mm to 1500mm, customizable to meet diverse industrial needs.

 

Technical Parameters

 

Item Specification

Product Name Galvalume Steel Coil

Coating Composition 55% Al, 43.5% Zn, 1.5% Si

Thickness Range 0.12mm – 4.0mm

Width Range 30mm – 1500mm

Coil Weight 3 – 10 MT per coil

Surface Finish Regular Spangle / Skin Pass

Tensile Strength 270 – 550 MPa

Zinc Coating Weight AZ30 – AZ150 (optional)

Standard ASTM A792 / JIS G3321

Packing Standard Export Sea-Worthy

 

Key Features and Advantages

Galvalume steel exhibits excellent corrosion resistance, especially in areas exposed to extreme weather or moisture. Compared with traditional galvanized steel, Galvalume offers 2 to 6 times better protection due to the synergistic effect of aluminum and zinc. The surface is smooth and reflective, providing better heat resistance and lower heat absorption. It maintains superior formability, weldability, and paint adhesion, making it a preferred choice for downstream fabrication processes. Additionally, the material is cost-effective due to its extended service life and reduced maintenance costs.

 

Applications and Technical Principle

The primary applications of Galvalume Steel Coils include roofing, wall panels, gutter systems, automotive parts, home appliances, electrical panels, and agricultural structures. The coating technology behind Galvalume is based on hot-dip metallurgical bonding, where the steel sheet is immersed in a molten aluminum-zinc alloy. This process forms a tightly adherent coating that resists oxidation and inhibits corrosion through a barrier and sacrificial mechanism. The aluminum provides a barrier to environmental elements, while the zinc offers galvanic protection at any exposed steel areas, effectively stopping rust before it starts.