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Help Center0.8mm Thickness G90 Hot Dipped Galvanized Steel Coil 1220mm Width for Duct Work
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Hemaokang Steel (Shandong) Co., Ltd. is a professional manufacturer and exporter of high-quality galvanized steel coils. Our 0.8mm Thickness G90 Hot Dipped Galvanized Steel Coil 1220mm Width is specifically engineered for duct work applications, offering excellent corrosion resistance, formability, and long service life. With an annual export value of US$50-100 million, we serve customers across North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. This product is ideal for HVAC systems, air ducts, and ventilation components where reliable performance and durability are essential.
▶ Product Features & Technical Specifications
- Precise Thickness: 0.8mm ±0.02mm, ensuring uniform strength and easy fabrication.
- Generous Width: 1220mm, suitable for standard duct work without excessive splicing.
- G90 Zinc Coating: 275g/m² (total both sides) provides superior protection against rust and corrosion.
- Hot Dipped Galvanizing Process: Creates a metallurgical bond between zinc and steel, preventing peeling or flaking.
- Excellent Formability: Can be bent, rolled, punched, and welded without cracking, ideal for complex duct shapes.
- Smooth Surface Finish: Spangle-free or minimized spangle available upon request, suitable for painting or powder coating.
- Customizable Coil Weight: Typically 3-8 tons per coil, with inner diameter options of 508mm or 610mm.
- Certified Quality: Manufactured under ISO9001 quality management system, ensuring consistent performance.
▶ Technical Parameters (Typical Values)
| Property | Value |
| Thickness | 0.8mm (0.0315") |
| Width | 1220mm (48") |
| Zinc Coating | G90 (275g/m²) |
| Tensile Strength | 270–500 MPa |
| Yield Strength | 140–300 MPa |
| Elongation | ≥20% |
▶ Advantages for Duct Work Applications
Our hot dipped galvanized steel coil is specifically designed to meet the demanding requirements of HVAC duct work. The G90 coating ensures long-term corrosion resistance even in humid environments, reducing maintenance costs. The 0.8mm thickness balances strength and weight, making it easy to handle and install while maintaining structural integrity. The 1220mm width minimizes the number of joints, improving air tightness and reducing leakage. Additionally, the smooth surface facilitates clean fabrication and allows for easy painting if needed.
▶ Trust & Reliability
Hemaokang Steel (Shandong) Co., Ltd. has been established in 2025 with a strong focus on quality and customer satisfaction. Our factory in Liaocheng, Shandong, China, employs 51–100 skilled workers and operates under the ISO9001:2015 quality management system. With an annual export value of US$50 million to US$100 million, we have successfully delivered products to diverse markets including North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, and Europe. We are committed to providing consistent quality, competitive pricing, and reliable delivery. Contact us today to discuss your specific requirements or request a sample.
▸ Frequently Asked Questions (FAQ)
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Q: What is the difference between G90 and other zinc coatings?
A: G90 indicates a total zinc coating weight of 0.90 oz/ft² (≈275g/m²), which is a standard heavy-duty coating for duct work. It offers better corrosion resistance than, for example, G60 (180g/m²). -
Q: Can this coil be used for outdoor duct work?
A: Yes, the G90 hot-dipped galvanized coating provides excellent protection against atmospheric corrosion. However, for extremely harsh environments, additional protective measures may be recommended. -
Q: What is the typical coil weight and how many meters per coil?
A: Coil weight is customized between 3-8 tons. For a 0.8mm x 1220mm coil, 1 ton equals approximately 130 meters. Approximate length per coil is 390–1040 meters. -
Q: Do you provide slitting or cut-to-length services?
A: Yes, we offer custom slitting and cutting services to meet your exact dimensions. Please inquire with our sales team. -
Q: Is the coil surface spangle-free?
A: Our standard hot dipped galvanized coil may have a regular spangle. For applications requiring a smooth finish (e.g., painting), we can supply a minimized spangle or zero spangle option upon request. -
Q: What are the packaging and shipping details?
A: Each coil is packed with waterproof paper, steel strapping, and edge protection. Suitable for sea freight, rail, or truck. Standard export packaging ensures safe arrival. -
Q: Do you have a minimum order quantity (MOQ)?
A: The MOQ is typically 1 full container (20-25 tons), but we can accommodate smaller orders for trial purposes. Please contact us for details. -
Q: How can I get a sample or certificate?
A: Samples are available upon request (freight collect). We also provide mill test certificates and ISO9001 documents with each shipment.
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