| Product Name | Factory Price Galvanized Sheet |
| Material | Dx51D, Dx52D, Dx53D, DX54D, S350GD, S350GD, S550GD; SGCC, SGCH |
| Thickness | 0.12-6.00mm or customer's requirement |
| Width | 600mm-1500mm, according to customer's requirement |
| Zinc coated | 40g-275g/m2 |
| Type of Coating | Hot Dipped Galvanized Steel Sheet |
| Surface Treatment | Passivation(C), Oiling(O), Lacquer sealing(L), Phosphating(P), Untreated(U) |
| Surface Structure | Normal , minimized , spangle-free |
| Standard | JIS / ASTM /EN/ AISI /GB /BS |
| Technique | Hot Rolled / Cold Rolled |
| Origin | Shandong China |
| Certificates | API ISO9001-2008,SGS.BV |
| Delivery Time | Usually within 10-31 days after receipt of advance payment |
Overview
The 0.4mm Galvanized Steel Coil (Small/Large Spangle/No Spangle, Z180g/Z275g) is a precision-engineered product designed for applications requiring consistent thickness and customizable surface finishes. With a nominal thickness of 0.4mm (tolerance: ±0.01mm), this coil balances lightweight characteristics with mechanical strength, while the choice of spangle (crystalline zinc pattern) or spangle-free surface caters to both functional and aesthetic needs.
Available in heavy-duty coatings (Z180g for urban, Z275g for coastal), the coil undergoes advanced hot-dip galvanization to ensure uniform zinc adhesion and corrosion resistance. The 0.4mm gauge is optimized for roll-forming into roofing sheets, wall panels, and appliance components, offering a versatile solution for mid-scale fabrication.
Features
Surface Finish Flexibility:
Large Spangle: Natural crystalline pattern (5-10mm) for enhanced corrosion resistance in exposed applications (e.g., outdoor roofing, storage tanks).
Small Spangle: Fine crystalline structure (1-3mm) for moderate corrosion protection with improved surface uniformity for painting.
No Spangle: Smooth, matte finish (Ra ≤1.0μm) ideal for decorative applications, laminations, or high-quality powder coating.
Heavy-Duty Coating Options:
Z180g: 180g/m² zinc coating suitable for urban and suburban environments, with a predicted lifespan of 15-20 years with minimal maintenance.
Z275g: 275g/m² coating for severe conditions (coastal, industrial), passing 1,500+ hours of salt spray testing without red rust.
Precision Engineering:
0.4mm thickness: Ideal for components requiring a balance of rigidity and formability (e.g., corrugated roofing sheets, curved cladding panels).
Tight width control (±0.5mm) ensures compatibility with standard roll-forming machines, reducing setup time in production lines.
Cost-Effective Performance:
30% lighter than stainless steel alternatives, lowering transportation and installation costs for large projects.
Pre-galvanized finish eliminates on-site coating steps, saving 25%+ in labor and material costs compared to post-galvanized methods.
Application
Roofing & Cladding: Forms corrugated or trapezoidal sheets for residential and commercial buildings, with Z275g/no spangle combo offering durability and modern aesthetics.
Appliance Manufacturing: Creates smooth panels for refrigerators, ovens, and range hoods, with spangle-free surface enabling seamless lamination with plastic or wood veneers.
Transportation Equipment: Fabricates lightweight truck bodies, trailer skins, and railway carriage interiors, with Z180g/small spangle providing reliable protection against road debris.
Metal Art & Design: Suitable for decorative metalworks, signage, and furniture, where no spangle finish allows for intricate embossing and vibrant paint applications.
FAQ
Q: What is the difference between spangle and spangle-free in terms of paint adhesion?
A: Spangle-free surfaces offer better paint adhesion due to uniform roughness, while spangled surfaces require light abrasion pretreatment for optimal results.
Q: Can I mix spangle finishes in a single order?
A: Yes, custom orders can include a mix of large spangle, small spangle, and spangle-free coils, ideal for projects requiring different surface treatments.
Q: How does the 0.4mm thickness perform in high-wind areas?
A: When formed into corrugated profiles (35mm wave height), it withstands 120 mph wind loads, meeting building codes in hurricane-prone regions.
Q: Is the coil suitable for direct contact with food packaging?
A: No, galvanized steel is not food-grade. For food applications, consider tinplate or stainless steel, but this coil is ideal for non-food industrial packaging.
