Qingdao Jero Steel Co., Ltd.
Add to Cart
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
| Property | Aluminum-Zinc Coated (AZ) | Galvanized Steel (GI) |
| Corrosion Resistance | Excellent (Al + Zn synergy) | Good (depends on Zn thickness) |
| Cost | 10–20% higher than GI | Lower cost |
| Heat Resistance | Up to 315°C | Up to 200°C (Zn melts at 420°C) |
| Appearance | Bright silver, more reflective | Dull gray, prone to white rust |
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.
