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Galvanized Steel Sheet
Product Overview
Our Galvanized Steel Sheets and Plates 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.
Available in a wide range of thicknesses, widths, and lengths, our galvanized sheets offer the perfect balance of strength, formability, and corrosion resistance. Whether you need standard flat sheets for general fabrication or custom sizes for specific projects, our products deliver consistent quality and reliable performance.
The zinc coating acts as a barrier against environmental elements while also providing sacrificial (cathodic) protection to the steel substrate.
This means that even if the surface is scratched or cut during fabrication or installation, the zinc will corrode preferentially, protecting the exposed steel from rust.
Key Features & Buyer Benefits
| Feature | Benefit to You |
| Excellent Corrosion Protection | The zinc coating provides both barrier and sacrificial protection, preventing red rust formation and extending product lifespan by decades in many environments. |
| Sacrificial Edge Protection | At cut edges, scratches, or drill holes, the zinc continues to protect the exposed steel, preventing rust creep. |
| Long Service Life | Depending on coating weight and environment, galvanized steel can last 20–50 years without maintenance. |
| Excellent Formability | The zinc coating adheres tightly to the base steel, allowing for bending, stamping, and forming without flaking or cracking. |
| Full Surface Coverage | The hot-dip process ensures all surfaces, including edges and corners, are completely coated with zinc. |
| Cost-Effective Protection | One of the most economical methods of corrosion protection, offering excellent value compared to other coating systems. |
| Paintable Surface | With proper surface treatment, galvanized steel provides an excellent base for painting (Galvannealed grade available for immediate painting). |
| Flat & Dimensionally Stable | Precision leveled sheets ensure flatness for accurate fabrication and professional appearance. |
Quick Specification Table (Typical Options)
| Item | Typical Range / Options | Buyer Notes |
| Base steel grade | DX51D, SGCC, SPCC, S220–S350 | Choose grade by forming, welding and strength needs |
| Thickness (base) | 0.25 mm – 6.0 mm | Tighter tolerances available on request |
| Width | 600 mm – 2000 mm (common: 914, 1000, 1219, 1250 mm) | Slit coils or full coils; custom widths possible |
| Coil ID | 508 mm, 610 mm | Specify for your line compatibility |
| Coil weight | 2 MT – 10 MT per coil | Lighter coils available for express shipment |
| Zinc coating (mass) | Z60 – Z275 g/m² (coating classes: G30, G60, G90, Z100, Z275 etc.) | Higher zinc mass = better corrosion resistance |
| Coating type | Hot-dip galvanized (HDG), Electro-galvanized (EG) | HDG for outdoor; EG for painting and indoor applications |
| Surface finish | Spangled, Zero-Spangle, Smooth | Choose per aesthetics and painting |
| Surface treatment | Passivation, Oiled | For export and to prevent rust in transit |
| Tolerances | As per EN 10143 / ASTM A653 / JIS G3302 | Quoted tolerance must match buyer’s processing needs |
| Packing | Wooden pallets, seaworthy packaging, plastic wrap, edge protectors | Custom packing for export available |
| Certificates | Mill test report (MTR), SGS, BV, third-party inspection | Indicate required certificates at enquiry |
| Lead time | 7–30 days depending on quantity and customization | Rush production options possible |
| MOQ | Typically 1–5 MT per size for standard | Negotiable for regular buyers |
Typical Uses (from buyer viewpoint)
Construction: roofing, wall panels, structural purlins, decking — chosen for weather resistance and lifecycle cost.
HVAC & ducting: smooth surface and formability make galvanized sheet ideal for air ducts and fittings.
Automotive components: inner panels, frames where corrosion resistance is required.
Appliances & equipment: bodies for refrigerators, washing machines, and other consumer appliances.
Electrical cabinets and enclosures: combines mechanical strength with corrosion protection.
Agricultural & industrial: grain silos, storage tanks, fencing, and machinery covers.
Key Features & Buyer Benefits
Corrosion Protection: Zinc sacrificial protection slows rusting—translates into lower lifecycle maintenance costs.
Cost-effective: Compared with stainless steel, galvanized steel delivers rust resistance at substantially lower material cost.
Good Formability & Weldability: Suitable for bending, stamping, roll-forming, and spot welding—important if buyer has downstream fabrication.
Consistent Surface for Painting: Pre-treated galvanized sheets accept primers and paints well, yielding long-lasting coated systems.
Long-term Availability & Supply Chain: Standard grades and coatings are widely produced—easier to source consistently in large volumes.
Recyclability & Sustainability: Steel and zinc are recyclable; often counts toward sustainability objectives.
FAQ – Frequently Asked Questions
1. What is the difference between hot-dip galvanized (GI) and electro-galvanized (EGI) sheets?
Hot-dip galvanized (GI) has a thicker zinc layer (40–350 g/m²) for stronger corrosion resistance, ideal for outdoor and structural use.
Electro-galvanized (EGI) has a thinner coating and smoother finish, mainly used for interior home appliances and electronics.
2. Can you customize thickness, width, length, and zinc coating?
Yes. We support customized specifications including thickness, width, length, zinc coating, surface treatment, and cutting.
3. What standards do your products comply with?
Our galvanized sheets meet ASTM A653, EN10327, JIS G3302, and GB/T 2518, suitable for global markets.
4. How about packaging for ocean transportation?
We use waterproof packaging, edge protection, and fumigated wooden pallets to prevent rust and damage during long-distance shipping.
5. Can you provide samples and test reports?
Yes. Free samples are available for quality verification. We provide mill test certificates (MTC), SGS, and other inspection reports.
6. How to ensure coating adhesion and corrosion resistance?
We use advanced continuous galvanizing lines with strict quality control for coating adhesion, salt spray test, and mechanical properties.
Contact our sales team today for a quotation or to discuss your project requirements. We are committed to providing high-quality galvanized steel sheet 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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