ASTM AZ150 0.4x1200mm Aluzinc Galvalume Steel Coil For Outdoor Metal Paneling

ASTM AZ150 0.4x1200mm Aluzinc Galvalume Steel Coil Chinese Supplier

Aluminum-Zinc coated steel coil is an advanced corrosion-resistant steel product manufactured

by hot-dip coating a cold-rolled or hot-rolled steel substrate with an alloy composed of 55% alu

-minum, 43.4% zinc, and 1.6% silicon. Known commercially as Galvalume, it combines aluminum’s

oxidation resistance with zinc’s sacrificial protection, making it superior to traditional galvanized steel

(GI) in harsh environments.

Composition  

Base Material: Cold-rolled or hot-rolled steel (low-carbon steel).  

Coating: An alloy of 55% aluminum, 43.4% zinc, and 1.6% silicon (common grades: AZ150,

AZ100, where the number indicates coating weight in g/m²). Silicon prevents brittle interme

-tallic formation between the coating and steel.  

Product Specifications & Standards

Key Properties  

Corrosion Resistance

 Aluminum forms a dense oxide layer (Al₂O₃), resisting acids, alkalis, and moisture. Service

life is 2–6 times longer than regular galvanized steel.  Zinc provides sacrificial protection, pr

-eventing rust even if the coating is scratched.  

Heat Resistance

Withstands 300–500°C (aluminum’s high melting point: 660°C), whereas galvanized steel degrades

above 200°C.  

Reflectivity & Aesthetics

Silver-gray surface reflects ≥80% of solar radiation, ideal for roofing. Can be painted (pre-painted coils)

for decorative purposes.  

Formability 

Good adhesion for stamping and bending, but higher hardness may increase tool wear.  

Applications 

Architectural Cladding  

Roofing/wall panels – leverages reflectivity + corrosion resistance  

HVAC ducts (resists condensation)  

Home Appliances  

Air conditioner housings (used by Gree/Haier)  

Oven cavities (Midea built-in ovens)  

Automotive Components  

Mufflers/exhaust pipes (requires modified AZ coating)  

Agricultural Infrastructure  

Greenhouse frames (resists fertilizer/pesticide corrosion)