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)