55% Al-Zn Alloy Coated Steel: Galvalume (GL / Aluzinc) Coils & Sheets Manufacturer
Premium quality ASTM A792 / JIS G3321 / EN 10346 55% Aluminum-Zinc alloy coated steel coils (GL, Aluzinc, Zincalume). Engineered for 4-6x longer atmospheric corrosion resistance than standard GI coils in harsh coastal, industrial, and high-temperature environments.
Why Sino East Steel Galvalume (GL) Outperforms Standard Galvanized Steel:
- 55% Al-43.4% Zn-1.6% Si Microstructure: Aluminum barrier protection combined with zinc galvanic sacrificial protection provides superior cut-edge passivation and uncompromised surface durability.
- Heat Resistance & Thermal Reflectivity: Withstands continuous operating temperatures up to 315°C (600°F) without discolouration, reflecting up to 75% of solar thermal radiation for energy-efficient metal buildings.
- Strict Coating Weight Range: Available from AZ50 (50 g/m²) up to heavy-duty AZ150 (150 g/m²) and AZ200 for extreme industrial and coastal roofing.
- Full Traceability & Direct Mill Supply: Supplied with 100% Prime Mill Test Certificates (EN 10204 3.1) and zero-spangle / regular-spangle surface passivated with anti-fingerprint (AFP) resin.
Galvalume (GL) Technical Specifications Matrix
| Specification Parameter | ASTM A792 / A792M Standard | JIS G3321 Standard | EN 10346 (DX51D+AZ) |
|---|---|---|---|
| Coating Alloy Composition | 55% Al, 43.4% Zn, 1.6% Si | 55% Al, 43.4% Zn, 1.6% Si | 55% Al, 43.4% Zn, 1.6% Si |
| Base Metal Thickness (BMT) | 0.14 mm – 2.0 mm | 0.15 mm – 2.0 mm | 0.15 mm – 2.0 mm |
| Available Width Range | 600 mm – 1250 mm (Standard 914/1000/1200/1219/1250mm) | 600 mm – 1250 mm | 600 mm – 1250 mm |
| Coating Mass Classes | AZ50, AZ70, AZ100, AZ150, AZ180 | AZ90, AZ120, AZ150 | AZ100, AZ150, AZ185 |
| Surface Treatment | Anti-Fingerprint (Transparent/Blue/Green AFP), Oiled, Chromated (Cr3+/Cr6+ Free) | ||
| Coil Inside Diameter (ID) | 508 mm (20″) / 610 mm (24″) with 3-8 Tons Coil Weight | ||
Galvalume (GL) vs. Galvanized (GI) vs. Pre-Painted (PPGI) Comparison
| Comparison Factor | Galvalume Steel (GL) | Galvanized Steel (GI) | Prepainted Steel (PPGI) |
|---|---|---|---|
| Corrosion Longevity | 20 – 30+ Years (4-6x longer than GI) | 10 – 15 Years (Sacrificial zinc) | 15 – 25 Years (Depending on paint) |
| Heat Resistance | Excellent (Up to 315°C continuous) | Moderate (Up to 200°C) | Moderate (Up to 120°C) |
| Primary Applications | Unpainted industrial roofing, solar brackets, mufflers, appliance back panels | General construction, HVAC ductwork, cable trays, structural purlins | Architectural facades, residential roofing, cold storage sandwich panels |
| Cost Efficiency | Best lifecycle cost per year | Lowest initial procurement cost | Premium aesthetic & color choice |
Frequently Asked Questions (FAQ) – Galvalume Steel
Q1: Can Galvalume steel sheets be used in animal livestock or concrete contact?
Galvalume is highly recommended for coastal and industrial roofing but should avoid direct wet contact with uncured concrete, mortar, or high-ammonia animal waste environments where pure GI with heavy zinc (Z275/Z350) or PPGI performs better.
Q2: What is the minimum order quantity (MOQ) and container loading capacity?
Our standard MOQ is 25 Metric Tons (one 20GP container). A 20ft container can comfortably load 4 to 6 coils (up to 27-28 MT total) with waterproof VCI wrapping, steel banding, and wooden skids.
Q3: How does Sino East Steel guarantee anti-fingerprint (AFP) quality?
We apply a continuous organic transparent/tinted resin coating on our modern continuous processing line, preventing finger marking during roll-forming while improving lubrication and roll-die lifespan.
Request Mill Direct Galvalume (GL) Quotation & Free Samples
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