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Galvanized Steel coil
Galvanized Steel coil
Galvanized steel coil is a corrosion-resistant steel product made through continuous hot-dip galvanizing or electrogalvanizing. By applying a zinc coating to the surface of the steel strip, it forms a protective layer that acts as both a physical barrier and a source of sacrificial cathodic protection. Galvanized steel coils offer excellent weather resistance, formability, and surface finish.
Zhaojian Steel supplies a wide range of galvanized coils, including hot-dipped galvanized steel coils, cold rolled galvanized steel coils, electro galvanized steel coils, and pre-painted galvanized steel coils. As a leading galvanized steel coil factory in China, we ensure fast delivery and consistent performance, whether you need standard sizes or customized specifications.
Galvanized Steel Coil Specification
| Item | Specification |
|---|---|
| Thickness | 0.3 mm – 3.0 mm (customizable) |
| Width | 600 mm – 1500 mm (common: 1000 mm / 1220 mm / 1250 mm) |
| Coil Weight | 3 – 10 tons per coil |
| Zinc Coating Weight | G30 / G60 / G90 (ASTM) or Z100 – Z275 (EN 10346) |
| Zinc Coating Type | Hot-Dip Galvanized / Electro-Galvanized |
| Steel Grade | SGCC, DX51D+Z, ASTM A653, S350GD, etc. |
| Surface Finish | Skin Pass / Chromated / Oiled / Dry / Anti-Fingerprint |
| Surface Appearance | Regular Spangle / Zero Spangle / Bright Finish |
| Coil Inner Diameter | 508 mm or 610 mm |
| Coil Outer Diameter | Typically up to 1500 mm (varies with thickness & weight) |
| Packing | water-proof paper + plastic film + steel straps |
Quality Certification
Galvanized Steel Coil Uses
Galvanized steel coil is used widely in construction, manufacturing, and consumer products.
Roofing and wall cladding for homes, commercial buildings, and industrial facilities.
Cable trays, HVAC ducts, and ventilation parts that require corrosion resistance.
Automotive parts, including inner panels, brackets, and support frames.
Home appliances such as refrigerators, washing machines, and air conditioner shells.
Electrical cabinets and enclosures needing protection and a clean finish.
Steel framing systems, roll-formed profiles, and lightweight trusses used in modern construction.
More Details About Zhaojian Steel Products
GI Coil Key Features
High Flatness
High-precision rolling ensures smooth, wrinkle-free coils for easy processing.
Premium Packaging
Steel straps with buckles and protective corners provide export-grade protection for safe transport.
Large-Scale Capacity
Our factory supports bulk orders with fast turnaround, maintaining consistent quality across every coil and sheet.
Manufacturing Process
We also produce electro-galvanized steel coil for applications requiring finer surface finish
- 1. Cleaning: The steel coil is degreased and acid-pickled to remove rust and scale.
- 2. Galvanizing: Hot-dip: The steel coil passes through molten zinc (~450 °C) for strong protection. Electro-galvanized: Zinc is electrically deposited on the steel coil surface for a smoother finish.
- 3. Post-treatment: Includes skin pass, passivation, oiling, or anti-fingerprint coating to enhance surface quality and corrosion resistance.
- 4. Inspection & Packing: Coating thickness, adhesion, and surface appearance are tested before applying export packaging.
FAQ
Contact us to get more info about our stock of galvanized steel coils for sale, ready for export. Global shipping to Southeast Asia, Europe, Middle East, South Africa,etc
Hot-dip coils have thicker zinc for better corrosion resistance (outdoor use). Electro-galvanized coils have a thinner, smoother coating (indoor use, paintable).
Typically over 20 years, up to 50 years depending on the environment and coating thickness.
Yes, thickness, width, zinc coating, and surface finish can be customized.
All coils are packed with waterproof paper, inner and outer steel rings, edge protectors, and wooden pallets or iron saddles. Packaging follows export sea-worthy standards to prevent rust, damage, or deformation during shipping.
Standard lead time is 15–25 days after deposit and order confirmation.
For stocked sizes or urgent orders, faster delivery may be possible.
Yes. We provide MTC (Mill Test Certificate) with every shipment.
If required, we can also arrange SGS, BV, TUV, or third-party inspection before loadin
