ASTM A792 Hot Dipped Galvalume Steel Coil Zinc Aluminizado Steel Material

Aluminum-zinc coated steel coil, also known as Aluzinc or Galvalume steel coil, is a high-performance

steel product with a metallic coating composed of aluminum, zinc, and silicon. It combines the superior

corrosion resistance of aluminum with the sacrificial protection of zinc, making it widely used in constru

-ction, appliances, automotive, and industrial applications.

Coating Composition

Typical Ratio: 55% aluminum, 43.4% zinc, and 1.6% silicon (e.g., Galvalume®).

Silicon improves coating adhesion and prevents excessive alloying with the steel substrate.

Coating Weight: Common grades include AZ60 (60g/m²), AZ100 (100g/m²), and AZ150 (150g/m²).

Key Features

♦ Superior Corrosion Resistance

Aluminum forms a protective oxide layer (Al₂O₃), while zinc provides cathodic protection.

2–6 times more corrosion-resistant than traditional galvanized steel (GI), especially in salty or humid environments.

♦ High-Temperature Resistance

Withstands up to 315°C (600°F) continuously, making it ideal for chimneys, ovens, and exhaust systems.

♦ Excellent Reflectivity & Aesthetics

Reflects ~75% of solar radiation, improving energy efficiency in roofing applications.

Can be painted (pre-coated) or embossed for decorative purposes.

♦ Formability & Strength

Suitable for deep drawing, bending, and roll forming, though harder than GI—may require adjusted

tooling.

Comparison: Aluzinc vs. Galvanized Steel 

Our company’s mainly advantages

♦  We have rich export operation experience for this product, and we know about the common-used

   spec in your country.

♦  We have long-term cooperation with our Forwarder Agent, and harbor reinforcement team,

    they dedicated to the operation of these raw material product for over 10 years.

♦  For every order, we have strictly packing and loading demand, we also take samples from

   the batch product, check the mechanical properties and the capacity of corrosion resistant.