Hot‑Dip Galvanized Coil combines structural carbon steel with a thick, durable zinc coating, produced via dipping in molten zinc (445–465 °C). This results in a metallurgical zinc-iron bond offering decades of robust corrosion resistance—even in coastal or industrial environments.
Key Specifications
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Standards Compliance: ASTM A653, EN 10346, JIS G3302 — including high-strength variants like S350GD+Z and S550GD+Z
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Thickness Range: 0.12–4.0 mm (±5% per ASTM A924), with custom slitting 600–1 500 mm wide, coils 508 / 610 mm ID
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Zinc Coating Grades:
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Z12 (≈120 g/m² per side) for indoor use
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Z27 (≈270 g/m² per side) for outdoor/coastal use
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G90 (≈275 g/m²) per U.S. standards
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Surface Finish Options: Zero‑spangle, minimized spangle, or decorative pattern
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Material Grades: DX51D+Z, DX52D+Z, DX53D+Z, DX54D+Z; high-strength options like S250GD, S350GD, S550GD+Z.
Our Advantages
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Exceptional Longevity: Z12 resists ~1,200 h to red rust (ASTM B117); Z27 ≥2,500 h (ISO 9227), significantly extending lifespan .
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Self-Healing Protection: Zinc sacrificially corrodes (0.05–0.15 mm/year), ensuring cut edges stay protected.
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Manufacturing Friendly: Easy bending (0T–2T at 0.8 mm), spot weldable (10–15 kA), and weldability ~20% better than bare steel.
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Finish Ready: Smooth surface ideal for painting or powder-coating; minimal spangle means cleaner final finishes.
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Tailored to Your Environment: Lightweight indoor grades to rugged coastal coatings—choose Z12 to G90 based on exposure.
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Certified Quality: All coils inspected to thickness tolerance, adhesion, spangle control, and oil/passivation finishing.
Typical Applications
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Construction: Roofing, structural beams, purlins, fencing, and framing
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Automotive: Chassis, structural panels, exhaust systems
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Agriculture: Grain silos, fencing, farms, outdoor structures
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Energy: Solar mounting systems, electrical cabinets, utility poles
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Manufacturing: HVAC ductwork, appliances, electrical enclosures
(Choose Z27 or higher for outdoor/harsh environments; Z12 is ideal for indoors.)
Model Highlights
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DX51D+Z / S250GD+Z – Standard-grade galvanized steel for everyday structural use
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S350GD+Z / S550GD+Z – High-strength galvanized coil for heavy-duty structural and load-bearing applications
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Z100, Z150, Z275, G90 – Coating levels tailored for specific corrosion requirements
📞 Start Your Project with Us
Let us recommend the best grade and coating for your needs. Send us your product specs—thickness, width, finish, and end-use environment—and we’ll provide:
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Tailored material recommendations
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Competitive quotes and fast delivery
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Technical support, datasheets, and mill certificates
Request samples or a quote today and discover the long-lasting performance and value of our galvanized coils.