How Does 55% Aluminum Galvalume Steel Coil Protect Your Building Roof?
May 13, 2026
S350GD+AZ Galvalume Steel Coil: A Reliable Solution for Building Roofing
When selecting roofing materials, durability and corrosion resistance are top priorities for builders and contractors. The S350GD+AZ Galvalume steel coil, with a thickness range of 0.12–2.0mm, is specifically designed to meet these demands for residential and industrial building roofing projects.
This product features a cold-rolled steel base hot-dipped with a 55% aluminum, 43.5% zinc, and 1.6% silicon alloy. The coating combines aluminum's strong barrier protection with zinc's sacrificial properties, delivering exceptional resistance against sun, rain, and snow. As a result, Galvalume roofing typically lasts two to four times longer than traditional galvanized steel in outdoor conditions.
Key Advantages for Roofing Applications
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Superior Corrosion Protection: The AZ30–AZ275 coating weight provides robust defense against moisture and weather exposure, reducing maintenance needs over decades of service.
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Wide Specification Range: Available in thicknesses from 0.12mm to 2mm and widths from 600mm to 1500mm, suitable for various roofing profiles and structural requirements.
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Multiple Surface Treatments: Options include anti-fingerprinting, chromated, oiled, or non-oiled finishes to meet specific handling and aesthetic needs.
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International Standards Compliance: Meets ASTM A792, JIS G3322, and EN 10346 standards, with grades including S350GD+AZ, G550, DX51D+AZ, and DX52D+AZ.
Beyond Roofing – Versatile Applications
While optimized for building roofing, this Galvalume steel coil is also widely used in:
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Shutter Doors: Rolling doors for commercial and industrial buildings
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Fencing: Outdoor barriers with rust resistance
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Automotive: Body parts and undercarriage components
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Vent Ducts: HVAC systems requiring moisture resistance
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Home Appliances: Casings for refrigerators, air conditioners, and washing machines
Packaging and Global Shipping
Each coil is secured with a three-layer protection system: moisture-proof paper, heavy-duty PE film, and steel strapping (3–5 tons per bundle, customizable). We work with trusted logistics providers to offer FCL, LCL, and breakbulk shipping, with fully trackable delivery typically reaching global destinations within 2 to 5 weeks.
Customer-Friendly Policies
Free standard samples are available from stock, with the customer only responsible for shipping costs. Factory visits are welcome, and flexible payment terms including L/C, D/P, and T/T are offered.
For builders and contractors seeking a long-lasting, cost-effective roofing material, the S350GD+AZ Galvalume steel coil delivers proven performance.
Contact us with your specifications for a customized quote.