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China Galvanized Steel Sheet and Coils - High-Quality Zinc-Coated Steel Strip Suppliers and Factory
Product Parameters
| Thickness | Common thickness ranges from 0.2mm to 5.75mm. |
| Width | Common width ranges from 600mm to 1500mm. |
| Zinc Coating Thickness | Typically between 10g/m² and 275g/m². |
| Tensile Strength | Typically between 300MPa and 600MPa. |
| Yield Strength | Typically between 200MPa and 400MPa. |
Product Types
Galvanized coils can be classified based on their use, material, and process:
By Use
- Construction galvanized coils: Used for roofs, walls, and steel structures.
- Appliance galvanized coils: Used for refrigerator, washing machine, and air conditioner exteriors.
- Automotive galvanized coils: Used for car bodies, chassis, and components.
By Material
- Carbon steel galvanized coils: Made of carbon steel, widely used in construction and manufacturing.
- Alloy steel galvanized coils: Contains manganese, silicon, etc., for higher strength and special uses.
By Process
- Hot-dip galvanized coils: Produced by hot-dip galvanizing, with a thicker zinc layer for better rust resistance.
- Electro-galvanized coils: Produced by electroplating, with a thinner zinc layer and smoother surface.
Product Advantages
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Excellent Rust Resistance
Zinc coating effectively prevents rust.
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Cost-Effectiveness
High cost-performance ratio, especially in large-scale applications.
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Wide Application
Suitable for construction, appliances, automotive, and more.
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Eco-Friendliness
Galvanized coils are recyclable and environmentally friendly.
Product Materials
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Carbon Steel
Mainly used for standard galvanized coils, cost-effective and strong.
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Alloy Steel
Contains manganese, silicon, etc., for enhanced strength and wear resistance.
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Zinc Coating
Provides rust protection, extending service life.
Product Applications
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Construction
Used for roofs, walls, and steel structures.
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Appliances
Used for refrigerator, washing machine, and air conditioner exteriors.
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Automotive
Used for car bodies, chassis, and components.
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Agriculture
Used for greenhouses and livestock fences.
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Industrial
Used for ventilation ducts and cable trays.
Process Advantages and Material Selection Guidelines
Advanced high-speed rolling and controlled cooling technologies ensure dimensional precision (±0.1 mm) and microstructural homogeneity, supporting downstream processes like drawing and heat treatment. Material selection must comply with industry standards (ASTM, GB/T, JIS), prioritizing carbon content, elongation, and surface defect control.
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Frequently Asked Questions
Q
What is the standard thickness range for galvanized coils?
Galvanized coils are commonly available in thicknesses ranging from 0.2mm to 5.75mm. The appropriate thickness depends on the specific application — thinner gauges are typically used for appliances and interior components, while thicker gauges are preferred for construction and structural applications.
Q
What is the difference between hot-dip galvanized and electro-galvanized coils?
Hot-dip galvanized coils are produced by immersing steel in molten zinc, resulting in a thicker zinc coating (up to 275g/m²) that offers superior corrosion resistance — ideal for outdoor and heavy-duty use. Electro-galvanized coils are produced via electroplating, yielding a thinner, more uniform zinc layer with a smoother surface finish, better suited for precision parts and interior applications.
Q
What industries commonly use galvanized coils?
Galvanized coils are widely used across multiple industries including construction (roofing, walls, steel structures), home appliances (refrigerators, washing machines, air conditioners), automotive (car bodies, chassis), agriculture (greenhouses, livestock fencing), and industrial sectors (ventilation ducts, cable trays).
Q
What international standards apply to galvanized coils?
Galvanized coils are manufactured in compliance with major international standards including ASTM (American Society for Testing and Materials), GB/T (Chinese National Standards), and JIS (Japanese Industrial Standards). These standards govern key properties such as zinc coating weight, tensile strength, yield strength, and surface quality.
Q
Are galvanized coils environmentally friendly?
Yes. Galvanized coils are considered environmentally friendly because they are fully recyclable. The zinc coating extends the service life of the steel, reducing the need for frequent replacement and lowering overall material consumption. Both the steel and zinc components can be recovered and reused at the end of the product's life cycle.
Q
Can galvanized coils be customized in terms of width and zinc coating thickness?
Yes. Galvanized coils can be customized to meet specific project requirements. Standard widths range from 600mm to 1500mm, and zinc coating thickness can be specified between 10g/m² and 275g/m². Custom specifications for tensile strength, yield strength, and surface treatment are also available upon request. Please contact us for tailored product catalogs and technical support.