Hot Dip Galvanized Coil

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.
We offer Hot Dip Galvanized Coil and related grades with 100% factory direct pricing and free quotes available within 6 hours.

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Product Introduction

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

  • Standards Compliance: ASTM A653, EN 10346, JIS G3302 — including high-strength variants like S350GD+Z and S550GD+Z

  • Thickness Range: 0.12–4.0 mm (±5% per ASTM A924), with custom slitting 600–1 500 mm wide, coils 508 / 610 mm ID

  • Zinc Coating Grades:

    • Z12 (≈120 g/m² per side) for indoor use

    • Z27 (≈270 g/m² per side) for outdoor/coastal use

    • G90 (≈275 g/m²) per U.S. standards

  • Surface Finish Options: Zero‑spangle, minimized spangle, or decorative pattern

  • Material Grades: DX51D+Z, DX52D+Z, DX53D+Z, DX54D+Z; high-strength options like S250GD, S350GD, S550GD+Z.


Our Advantages

  1. Exceptional Longevity: Z12 resists ~1,200 h to red rust (ASTM B117); Z27 ≥2,500 h (ISO 9227), significantly extending lifespan .

  2. Self-Healing Protection: Zinc sacrificially corrodes (0.05–0.15 mm/year), ensuring cut edges stay protected.

  3. Manufacturing Friendly: Easy bending (0T–2T at 0.8 mm), spot weldable (10–15 kA), and weldability ~20% better than bare steel.

  4. Finish Ready: Smooth surface ideal for painting or powder-coating; minimal spangle means cleaner final finishes.

  5. Tailored to Your Environment: Lightweight indoor grades to rugged coastal coatings—choose Z12 to G90 based on exposure.

  6. Certified Quality: All coils inspected to thickness tolerance, adhesion, spangle control, and oil/passivation finishing.


Typical Applications

  • Construction: Roofing, structural beams, purlins, fencing, and framing

  • Automotive: Chassis, structural panels, exhaust systems

  • Agriculture: Grain silos, fencing, farms, outdoor structures

  • Energy: Solar mounting systems, electrical cabinets, utility poles

  • Manufacturing: HVAC ductwork, appliances, electrical enclosures

(Choose Z27 or higher for outdoor/harsh environments; Z12 is ideal for indoors.)


Model Highlights

  • DX51D+Z / S250GD+Z – Standard-grade galvanized steel for everyday structural use

  • S350GD+Z / S550GD+Z – High-strength galvanized coil for heavy-duty structural and load-bearing applications

  • 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:

  • Tailored material recommendations

  • Competitive quotes and fast delivery

  • Technical support, datasheets, and mill certificates

Request samples or a quote today and discover the long-lasting performance and value of our galvanized coils.

Luo Kaiwei Steel Company is a multi-ISO certified steel manufacturer specializing in carbon steel plates, pipes and galvanized coils since 2010. Competitive prices and ASTM/JIS compliant. Get instant quotes for bulk orders and global shipping support.

Tel: +86 15635685959

E-mail: [email protected]  

WhatsApp: +86 18912200505

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