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Help CenterHot Dipped Galvanized Steel Coil GI Coil Zinc Coated Galvanized Coil for Roofing Construction
Product Spotlights
Custom zinc coating from 60g/m² to 275g/m², perfect for outdoor, greenhouse and roofing long-term use.
Alloy zinc layer resists scratch, acid rain and saline environment, long service life.
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Product Introduction
Hot-dipped galvanized steel coil, also known as GI coil, is produced by immersing low-carbon steel substrate into molten zinc liquid to form a firm zinc-iron alloy protective layer on the steel surface. It features superior anti-rust and anti-corrosion performance, balancing cost and service life perfectly. Widely recognized as basic raw material for construction, agriculture, pipe manufacturing and hardware processing. Our factory strictly follows ASTM A653, EN 10346 and JIS G3302 standards to produce stable-quality galvanized coils with complete specifications for global buyers.
Core Advantages
Superior Anti-Corrosion & Anti-Rust Performance
Adopt complete hot-dip galvanizing process with tight zinc layer adhesion. Customizable zinc coating weight from Z60 to Z275. The alloy zinc layer can isolate air, water vapor, acid rain and salt fog effectively, resisting oxidation and scratch peeling. Suitable for long-term outdoor service to greatly extend service life.
Excellent Formability & Machinability
Made of Q195/Q235 low-carbon soft steel substrate with good ductility and high elongation rate. It supports deep drawing, bending, stamping and tube making without cracking or cracking edges. Flat and clean surface without zinc tumors, missing plating or obvious scratches to guarantee smooth processing efficiency.
Diversified Custom Surface Treatment
Multiple surface options for different usage demands: regular spangle, minimum spangle and zero spangle. Optional passivation, anti-fingerprint AF treatment, oiled or non-oiled. PE film lamination is available to prevent scratch and oxidation during long-distance sea transportation.
Full Size Range & Flexible Processing
Thickness covers 0.12mm–3.0mm, original coil width 1000/1200/1250/1500mm. We provide slitting into narrow strips and cut-to-length flat sheets as customer requests. Inner coil ID 508mm / 610mm, single coil weight 1–12 tons, custom weight split available.
Factory Direct Supply & Stable Delivery
Mass raw material stock supports fast bulk order shipment. All goods are equipped with official Mill Test Certificate (MTC), third-party inspection reports and CE certification upon request. Competitive factory price without middlemen markup.
Detailed Technical Parameters
| Item | Specification |
|---|---|
| Product Name | Hot Dipped Galvanized Steel Coil, GI Coil, Zinc Coated Steel Roll |
| Base Material | Q195, Q235, SPHC, SPCC Low Carbon Steel |
| Executive Standard | ASTM A653, EN 10346, JIS G3302, GB/T 2518 |
| Thickness | 0.12mm – 3.0mm |
| Original Width | 1000mm, 1200mm, 1250mm, 1500mm |
| Custom Slitting Width | 20mm – 1500mm |
| Coil Inner Diameter | 508mm (20 inch), 610mm (24 inch) |
| Single Coil Weight | 1–12 tons, customizable |
| Zinc Coating Weight | Z60, Z80, Z100, Z120, Z180, Z200, Z275 (60–275g/m²) |
| Zinc Flower Type | Regular Spangle, Minimum Spangle, Zero Spangle |
| Surface Treatment | Passivated, Anti-fingerprint, Non-passivated, Oiled / Non-oiled, PE Film Covered |
| Mechanical Index | Tensile strength: 270–500MPa; Yield strength: 180–320MPa; Elongation ≥25% |
| Available Processing | Slitting, Cut To Length, Film Lamination, Custom Cutting |
Wide Application
Construction field: Roofing sheets, wall panels, steel structure brackets, guardrails
Agricultural industry: Greenhouse frames, farm equipment, breeding shed accessories
Pipe manufacturing: Round/rectangular galvanized tubes, ventilation ducts
Deep processing hardware: Stamped fittings, metal cabinet, home appliance shells
Auxiliary raw material: Substrate for color coated steel coils
Packaging & Shipping
Standard package: Coil wrapped with waterproof paper, reinforced with steel strapping; wooden pallets optional for container loading
Trade terms: FOB, CFR, CIF for major global ports
Shipment: In stock goods deliver within 10-15 days; customized orders with stable lead time
Extra protection: PE film covering to avoid surface damage during ocean transit
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