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Galvanized Steel Coil
Product Overview
Our Galvanized Steel Coils are produced through a continuous hot-dip galvanizing process, where high-quality cold-rolled or hot-rolled steel is immersed in a bath of molten zinc. This creates a metallurgically bonded coating that provides exceptional corrosion protection and long-lasting durability.
Quick Reference Specification Table (Typical Options)
| Item | Typical Range / Options | Buyer Notes |
| Base steel grades | DX51D, DC01, SPCC, SGCC, S220–S350 | Choose by formability, strength and welding needs |
| Thickness (base steel) | 0.15 mm – 6.0 mm (common: 0.3–3.0 mm) | Tighter tolerances available on request |
| Width | 600 mm – 2000 mm (common slit widths: 914, 1000, 1250 mm) | Specify slitting/cut-to-length requirements |
| Zinc coating mass | Z30 – Z600 g/m² (coating classes e.g., G30/G60/G90/Z100/Z275/Z600) | Select by environment: indoor vs coastal vs industrial |
| Coating process | Hot-dip galvanized (HDG) / Electro-galvanized (EG) | HDG = heavier protection; EG = smoother surface for painting |
| Surface finish | Spangled, Zero-Spangle, Smooth | Affects appearance and paintability |
| Surface treatment | Passivation, Oil, Chromate-free passivation | For export protection and painting readiness |
| Tolerances | Per EN 10143 / ASTM A653 / JIS G3302 | Confirm for precision processing |
| Packing | Steel straps, inner VCI/kraft wrap, seaworthy wooden box/pallet | Custom packing for long sea voyages or harsh climates |
Mill Test Certificate (MTC) is available for each batch
Common Applications (buyer-centered view)
Roofing & Cladding: economical protective layer for building envelopes; choose higher Z for long life in exposed areas.
Roll-formed profiles & purlins: coil-to-profile lines benefit from consistent thickness and edge quality.
HVAC ducting & fittings: smooth, formable surface and good weldability make coils suitable for air systems.
Appliance manufacturing: panels, cabinets and internal support where painted finish is required.
Automotive components: inner panels, reinforcements and structural parts where corrosion resistance is needed.
Electrical enclosures & cabinets: protection for indoor/outdoor installations with specified coating mass.
Agricultural & industrial equipment: silos, fencing, machinery covers—coils enable efficient fabrication.
FAQ — Frequently Asked Questions (for International Buyers)
Q: What is the primary difference between hot-dip galvanized coil and electro-galvanized coil?
A: Hot-dip galvanized coil has a metallurgically bonded, thicker zinc coating applied by immersion in molten zinc — it offers superior outdoor corrosion resistance.
Electro-galvanized coil uses electroplating to deposit a thinner, smoother zinc layer that excels for indoor use and painting/finishing due to its uniform surface.
Q: How do I choose the right zinc coating mass for my application?
A: Consider exposure conditions: indoor/non-corrosive environments often use Z30–Z100 g/m².
General outdoor use typically requires Z120–Z275 g/m².
Harsh coastal, industrial or highly corrosive environments may need Z275+ or special coatings. Balance lifecycle needs against cost.
Q: How should coils be stored and handled on site?
A: Store horizontally on dry dunnage, protected from direct rain and ground contact.
Avoid stacking incompatible coating classes together. Use proper lifting gear (C-hooks, spreader bars) to prevent coil damage.
Q: What information do you need to provide a precise quotation?
A: Required: base steel grade, thickness, width, coil ID and max coil weight, zinc coating mass (Z value), coating process (HDG or EG), surface finish, quantity (MT or coils), required certificates/inspections, packaging request, Incoterm and destination port. Include any slit or cut-to-length requests.
Contact our sales team today for a quotation or to discuss your project requirements. We are committed to providing high-quality galvanized steel coils that meet your exact specifications and delivery deadlines.
Your trusted partner in galvanized steel solutions.For further technical information, pricing, or customization, please contact our sales team:
Tel/WA/Wechat: +86 13225105678
Email: sales01@duohessplate.com
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