Product Overview
ASTM A653 hot dip galvanized steel coil (GI coil) is produced through a continuous galvanizing process, forming a uniform zinc coating that provides long-term corrosion protection.
Common coating grades:
- Z180 – suitable for general indoor and industrial use
- Z275 – enhanced corrosion resistance for outdoor and harsh environments
This material combines durability, cost efficiency, and excellent formability, making it widely used in B2B industries.
Specifications
- Standard: ASTM A653 / A653M
- Base Material: DX51D, SGCC, SPCC (customizable)
- Coating: Z180, Z275 (Z120, Z350 available)
- Type:
- GI (Galvanized Steel)
- GL (Galvalume optional)
- Thickness: 0.2 – 3.0 mm
- Width: Custom slit or full coil
- Surface Treatment:
- Oiled / Dry
- Anti-fingerprint (AFP)
- Pre-treatment for coating
- Supply Form: Coil, sheet, or processed parts
Key Advantages
- Excellent Corrosion Resistance
Zinc coating provides both barrier and sacrificial protection - Good Formability & Weldability
Suitable for stamping, bending, and deep drawing - Cost-Effective Solution
Better lifecycle cost compared to stainless steel - Versatile Processing
Easy for painting, coating, and further fabrication - Consistent Quality
Produced under ASTM standards with stable coating thickness
Applications
- Construction: roofing, wall panels, purlins
- Automotive: structural and anti-corrosion parts
- Home Appliances: refrigerator, washing machine panels
- Storage: racks, containers
- Electrical: cable trays, cabinets
- Solar & Agriculture: mounting systems, greenhouse structures
FAQ
Q: What is the difference between Z180 and Z275?
A: Z275 has a thicker zinc coating, providing better corrosion resistance.
Q: Can it be painted or powder coated?
A: Yes, surface pre-treatment is recommended for better adhesion.
Q: Do you provide samples and inspection?
A: Yes, samples and third-party inspection are available.
Why Choose Us as Your Galvanized Steel Coil Supplier?
1. Factory Direct Supply (No Middleman)
We are a direct manufacturer of ASTM A653 galvanized steel coils, ensuring competitive pricing, stable supply, and full control over quality and production.
2. Strict Quality Control System
All products comply with ASTM A653/A653M standards, with:
- Coating weight inspection (Z180, Z275, etc.)
- Thickness tolerance control
- Surface quality checks
Mill Test Certificates (MTC) and third-party inspection (SGS/BV) are available.
3. Customization Capability
We provide tailored solutions based on your requirements:
- Thickness, width, and coil weight
- Surface treatment (oiled, anti-fingerprint, etc.)
- Slitting and cut-to-length services
4. Fast Delivery & Stable Lead Time
With efficient production lines and optimized supply chain management, we ensure:
- Short production cycles
- On-time shipment
- Support for urgent orders
5. Rich Export Experience
We have exported to multiple global markets, including:
- Southeast Asia
- Middle East
- South America
- Africa
We understand international standards, packaging, and logistics requirements.
6. Professional Sales & Technical Support
Our experienced team provides:
- Quick response within 12 hours
- Technical consultation
- Long-term supply solutions
7. Flexible MOQ & Long-Term Cooperation
We support both trial orders and bulk orders, helping you:
- Test product quality
- Reduce procurement risk
- Build long-term partnerships
