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Galvalume Steel
Galvalume Steel
Galvalume steel is a high-performance material made by coating a base steel sheet with an alloy layer containing 55% aluminum, 43.4% zinc, and 1.6% silicon. This unique composition combines the durable corrosion resistance and heat reflectivity of aluminum with the sacrificial protection of zinc. Widely used in roofing, wall cladding, machinery, appliances, and agricultural structures, especially in harsh environments.
At Zhaojian Steel, we are a leading manufacturer of Galvalume steel, offering a full range of specifications at competitive prices.
- Alloy Composition: 55% Aluminum, 43.4% Zinc, 1.6% Silicon
- Coating Weight: AZ30 – AZ200 kilograms per square meter
- Width: 600–1250 mm | Thickness: 0.2–1.2 mm
- 15–25 day delivery, OEM/ODM accepted
Advantages of Galvalume Steel
Superior Corrosion Resistance: 3 to 6 times more durable than conventional galvanized steel.
High Temperature Resistance: Coating remains stable without discoloration or peeling under heat.
Excellent Workability: Suitable for cold bending, stamping, welding, and various other processing methods.
Aesthetic Finish: Smooth surface with a metallic silver-gray luster.
Extended Service Life: Ideal for exposed environments such as roofing and exterior wall panels.
Galvalume Steel Products Specification
| Item | Range / Description |
| Thickness | 0.12 mm – 2.5 mm |
| Width | 600 mm – 1250 mm (customizable) |
| Coating Composition | 55% Al, 43.4% Zn, 1.6% Si |
| Coating Weight | AZ50 – AZ150 (150g/m² is commonly used) |
| Standards | ASTM A792 / A755, JIS G3321, EN 10346 |
| Surface Treatment | Regular, anti-fingerprint, oiled, pre-painted |
| Surface Finish | Smooth, orange peel, spangle |
| Yield Strength | Typically 250 – 550 MPa (varies by steel grade) |
| Paint Type | PE / SMP / HDP / PVDF |
Quality Certification
Galvalume Steel Uses
Construction: Metal roofing, wall cladding, gutters, purlins, fencing systems
Machinery: Equipment casings, electrical enclosures, machine guards
Agriculture: Barns, greenhouse frames, livestock shelters, storage buildings
Home Appliances: AC casings, refrigerator backs, washing machine panels
Transportation: Trailer panels, containers, vehicle underbodies
Industrial Projects: HVAC ducts, drainage systems, structural supports
More Details About Zhaojian Steel Products
Key Features
Direct Supply
Reliable quality, complete specifications, and stable supply from the manufacturer.
Surface Treatment
Smooth, corrosion-resistant surface suitable for diverse harsh conditions.
Strict Quality Inspection
Comprehensive dimensional and quality checks before shipment ensure product compliance.
Galvalume Steel Products Manufacturing Process
- Cleaning: Surface contaminants and oils are removed using alkaline solutions. Hot-Dip Coating: The steel strip passes through a molten Al-Zn-Si bath to form a uniform alloy coating. Cooling & Solidification: Rapid cooling solidifies the coating into a protective layer. Post-Treatment (Optional): Anti-fingerprint coating, light oiling, passivation, or paint application. Slitting & Packaging: Final products are cut into sheets or coils and packaged per customer requirements.
- Hot-Dip Coating: The steel strip passes through a molten Al-Zn-Si bath to form a uniform alloy coating.
- Cooling & Solidification: Rapid cooling solidifies the coating into a protective layer.
- Post-Treatment (Optional): Anti-fingerprint coating, light oiling, passivation, or paint application.
- Slitting & Packaging: Final products are cut into sheets or coils and packaged per customer requirements.
FAQ
Yes, Galvalume steel can be factory-coated with organic paints to produce Pre-painted Galvalume Steel (PPGL), which provides improved durability, UV resistance, and color options.
While Galvalume performs well for most outdoor applications, it is not recommended for direct marine exposure (e.g., within 1 km of the coastline) because the aluminum-zinc coating can degrade in high-chloride environments.
Common standards include ASTM A792, ASTM A755, JIS G3321, and EN 10346, depending on region and application.
