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Help CenterHot-Dip Galvanized Coil G90 0.5mm ASTM A653 Steel Strip 4ft to 8ft Slit Coil
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Hemaokang Steel (Shandong) Co., Ltd. introduces the Hot-Dip Galvanized Coil G90 0.5mm ASTM A653 Steel Strip 4ft to 8ft Slit Coil — a premium solution for manufacturers, contractors, and distributors who demand consistent quality, tight tolerances, and reliable corrosion protection. As an established steel supplier based in Liaocheng, Shandong, we combine our extensive export experience with a dedicated production capacity to deliver galvanized coils that meet the rigorous performance needs of modern construction and industrial applications. This product is engineered to satisfy from small workshop fabrications to large-scale infrastructure projects, offering excellent formability, weldability, and long-term durability.
Why Choose Our G90 Hot-Dip Galvanized Coil?
Our galvanized coil is manufactured under a strict quality control system that follows the ASTM A653 specification. The G90 coating designation indicates a total zinc coating weight of 0.90 oz/ft² (about 275 g/m²) across both sides, providing a balanced layer of sacrificial protection against corrosion. With a thickness of 0.5mm and a slit width ranging from 4ft to 8ft, this product delivers high adaptability to various downstream processes including rolling, stamping, cutting, and bending.
- Superior Corrosion Resistance: The hot-dip galvanized coating forms a metallurgically bonded layer that protects the steel substrate even in humid, coastal, and industrial environments.
- Strict ASTM Compliance: Meets ASTM A653 / A653M requirements for coating weight, mechanical properties, and dimensional tolerances.
- Precise Thickness Control: 0.5mm thickness maintained with uniform coating distribution for consistent performance.
- Flexible Slit Widths: Available in 4ft (1219mm) to 8ft (2438mm) nominal widths; custom slit coils are produced to exact buyer specifications.
- Excellent Formability: Suitable for roll forming, stamping, deep drawing, and other common metalworking operations.
- Clean Surface: No oil residue or minimal oil options, spangle control, and smooth edges for immediate processing.
Product Specifications & Technical Parameters
| Material | Cold rolled steel strip / low carbon steel |
| Coating | Hot-dip galvanized, G90 (0.90 oz/ft² total both sides) |
| Standard | ASTM A653 / A653M |
| Thickness | 0.5 mm (tolerance: ±0.05mm typical) |
| Width range | 4 ft (1219 mm) to 8 ft (2438 mm); slit widths custom |
| Inner diameter | 508 mm (20 inch) or 610 mm (24 inch), optional |
| Coil weight | 3–12 tons per coil (based on width and thickness) |
| Surface | Regular spangle, minimized spangle, or matte finish |
| Edge | Slit edge, free from burrs |
| Application | Roofing sheets, wall panels, steel structure, cold-formed purlins, ducting, automotive parts, storage racks |
Key Features & Customer Benefits
This galvanized slit coil is designed with the end user in mind. Here are the main advantages you can expect:
| Long-term durability | The G90 coating provides decades of maintenance-free service in typical atmospheric conditions. |
| Cost-effective solution | Eliminates the need for additional painting or coating in many indoor and outdoor applications. |
| Strong adhesion | The zinc-steel alloy layers ensure the coating does not peel or flake during forming. |
| Uniform coating thickness | Advanced hot-dip lines guarantee consistent zinc distribution across the coil. |
| Customizable slit width | From narrow strips to wide sheets, we can slit according to your production requirements, reducing material waste. |
| Smooth surface quality | Available with oiled or un-oiled surface, chromated or non-chromated, to suit your processing needs. |
Quality Assurance & Production Process
We operate in accordance with the ISO9001 quality management system. Every production step — from raw steel strip inspection, galvanizing temperature control, coating weight measurement, to final slitting and packaging — is strictly monitored. Our technical team conducts regular tests including zinc coating weight (triple spot test), adhesion bending test, and dimensional inspection to ensure the delivered product aligns with your specifications.
Our factory is located in Liaocheng, Shandong, close to major raw material suppliers and the Port of Qingdao, which allows us to offer efficient logistics for both domestic and international customers. With an annual export value of USD 50-100 million and a professional team of 51-100 employees, we are well positioned to serve clients in North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East.
Typical Applications
- Building materials: corrugated roofing sheets, floor decking, wall cladding, and ceiling profiles.
- Light steel structures: purlins, girts, and cold-formed steel framing members.
- Industrial equipment: cable trays, ventilation ducts, electrical enclosures, and storage systems.
- Automotive components: brackets, reinforcement strips, and underbody parts.
- Agricultural machinery: grain bins, silos, panels, and fencing components.
Packing & Loading
Coils are wrapped with moisture-proof paper, polyethylene film, and steel sheets, then secured with steel strapping. Edge protection is applied to prevent damage during transit. Standard export seaworthy packing ensures your goods arrive in perfect condition. Coil inner diameters of 508mm or 610mm are available; please specify your requirement when placing an order.
Why Partner With Hemaokang Steel?
Since our establishment, we have focused on building long-term partnerships based on transparent communication and product reliability. Our sales team provides prompt quotations, technical documentation, and after-sales support. We accept small trial orders and mixed container loading to help customers optimize freight costs. For volume orders, we guarantee consistent quality across batches through our strict supplier management and in-house testing capabilities. With our location advantage and streamlined logistics, we ensure timely delivery from Qingdao port to destinations across the globe.
Frequently Asked Questions (FAQ)
1. What does G90 mean in this galvanized coil?
G90 is a coating weight designation per ASTM A653. It means the total zinc coating weight is 0.90 oz/ft² (approximately 275 g/m²) applied on both sides of the steel sheet. This provides a reliable level of corrosion protection for a wide range of applications.
2. Is the 0.5mm thickness available with different widths?
Yes. The product can be supplied in widths ranging from 4ft (1219mm) to 8ft (2438mm) as slit coil. We also offer narrower slit strips down to 50mm or wider coils depending on the parent coil design. Custom widths can be produced with tight tolerances to suit your specific processing line.
3. Can you provide certification documents such as mill test certificates?
Yes. Each shipment can include a mill test certificate reporting chemical composition, mechanical properties, coating weight, and dimensional results. We can also provide a certificate of compliance with ASTM A653 requirements upon request. Our quality management system is ISO9001 certified.
4. What is the maximum coil weight I can order?
Typical coil weights range from 3 to 12 metric tons depending on the width, thickness, and inner diameter. For slit coils, the weight is often limited by the finished coil dimensions. Please contact our sales team to optimize the coil weight for your handling equipment and stamping line.
5. Do you offer different surface finishes like spangled or matte?
Yes. We can supply regular spangle, minimized spangle, and matte (non-spangled) finishes. The surface can also be supplied with light oiling or dry, and chromated or non-chromated, depending on your requirement. All options are available upon request.
6. What are the payment terms and delivery time?
We commonly accept T/T and L/C at sight for export orders. For samples, small trial orders, or long-term contracts, flexible terms can be discussed. Delivery time depends on the quantity and width; for standard products, it is generally 15-25 days after receiving deposit or confirmation. We ship from Qingdao port.
7. How do you ensure the coating does not peel during roll forming?
Our hot-dip galvanized coating has a metallurgical bond with the base steel. We perform bend tests and coating adhesion tests as part of our QC process. The zinc layer is designed to withstand ordinary forming operations without flaking or cracking. For severe forming, we recommend a lower coating weight or special surface treatment, which we can advise on.
8. Can you supply this coil in small quantities for trial?
Yes, we accept trial orders starting from one or two coils. A trial order allows you to verify quality and performance before entering into a higher-volume supply contract. Our flexible production planning lets us accommodate both small and large orders.
Experience the reliability of Hemaokang Steel. With our experienced export team, established quality system (ISO9001), extensive market coverage, and competitive production capability, we are your trusted partner for hot-dip galvanized coils. Contact us today for a quote or to discuss your custom slit coil specifications. We look forward to providing you with high-quality materials and professional service from the heart of China’s steel industry.
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