Galvalume Steel Coil (GL) – Technical Guides & Insights
Explore GL steel coil specifications, aluminum-zinc coating standards, corrosion resistance, and industrial applications.
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Galvalume Steel Coil (GL) Guide
Steel Coil Categories
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Galvalume Steel Coil (GL)Galvalume Steel Coil (GL)
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Frequently Asked Questions
Galvalume steel coil is steel sheet coated with an aluminum-zinc alloy through a continuous hot-dip process. The coating typically contains 55% aluminum, 43.4% zinc, and 1.6% silicon by weight.
Galvalume steel uses an aluminum-zinc alloy coating, while galvanized steel uses a zinc coating. Galvalume generally offers better long-term atmospheric corrosion resistance, while galvanized steel provides effective sacrificial protection.
Common coating designations include AZ50, AZ55, and AZ60. AZ50 and AZ55 correspond approximately to 150 g/m² and 165 g/m² respectively, measured as total coating mass on both sides.
ASTM A792/A792M is a key international specification for aluminum-zinc alloy-coated steel sheets. EN 10346 and JIS G 3321 are also relevant standards for metallic-coated steel products.
Galvalume steel coils are widely used in metal roofing, wall cladding, industrial buildings, agricultural structures, and other applications requiring corrosion resistance and heat reflectivity.
