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Help CenterGalvanized Steel Coil for Roofing Sheet Manufacturing With DX51D Grade and Z275 Coating
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As a leading manufacturer from Hemaokang Steel (Shandong) Co., Ltd., we are proud to present our DX51D Grade Z275 Galvanized Steel Coil — a premium material engineered specifically for roofing sheet production. With our company established in 2025 and boasting an annual export value of US$50–100 million, we combine fresh innovation with a global supply chain to deliver consistent quality. This coil features a uniform zinc coating of 275g/m², ensuring excellent corrosion resistance and long service life in demanding environments. Whether you need standard sizes or custom dimensions, our coil offers the perfect balance of strength, formability, and cost-effectiveness for your roofing manufacturing line.
Product Features & Technical Specifications
- Superior Corrosion Resistance – The Z275 coating (275g/m² of zinc per square meter) provides robust protection against rust, even in humid or coastal areas, extending the lifespan of roof sheets.
- Excellent Formability – DX51D grade steel is specifically designed for cold forming, bending, and profiling, making it ideal for manufacturing corrugated roofing sheets, trapezoidal profiles, and custom shapes.
- Consistent Mechanical Properties – Our coil undergoes strict quality control to ensure uniform tensile strength, yield strength, and elongation, meeting the demands of high-speed roll forming machines.
- Customizable Dimensions – Thickness from 0.12mm to 2.0mm and width from 600mm to 1250mm are available, with inner diameters of 508mm or 610mm to suit your packaging and handling requirements.
- Smooth Surface Finish – The hot-dip galvanizing process produces a spangled or matte finish that is free from defects, ensuring excellent paint adhesion for color-coated sheets if further processing is needed.
- Global Compliance – Our coil conforms to international standards such as EN 10346, ASTM A653, and JIS G3302 (available upon request), guaranteeing compatibility with diverse market requirements.
| Property | Value | Test Method |
|---|---|---|
| Yield Strength | 140 – 300 MPa (typical) | EN ISO 6892-1 |
| Tensile Strength | 270 – 500 MPa (typical) | EN ISO 6892-1 |
| Elongation after fracture (A80) | ≥ 22% | EN ISO 6892-1 |
| Zinc Coating Weight (triple spot test) | ≥ 275 g/m² | EN 10346 |
Benefits for Roofing Manufacturers: Using our DX51D Z275 coil reduces the need for additional post-treatment, lowers material waste, and improves production efficiency. The consistent temper and coating ensure that your finished roofing sheets have a uniform appearance and reliable performance, from installation through decades of service.
Why Choose Hemaokang Steel?
Founded in 2025, Hemaokang Steel (Shandong) Co., Ltd. has rapidly grown to become a trusted supplier with an annual export value of US$50 – 100 million. Our team of 51–100 skilled employees operates from our facility in Liaocheng, Shandong, China, serving markets across North America, South America, Europe, Asia, Africa, and Oceania. We are ISO9001 certified, ensuring that every coil undergoes rigorous quality checks from raw material sourcing to final packaging. Our main markets include both domestic and international clients, and we are committed to providing competitive pricing without compromising on quality. With a strong focus on customer satisfaction, we offer flexible order quantities, prompt delivery, and technical support for your specific application. Contact us today for a quotation or to request samples — experience the reliability of Hemaokang Steel for your next roofing project.
Frequently Asked Questions (FAQ)
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Q: What is the difference between DX51D and other grades like DX52D?
A: DX51D is a standard grade for general forming and bending, with lower yield strength suitable for roofing profiles. DX52D offers higher strength for more demanding applications. Our Z275 coil is optimized for typical roofing sheet manufacturing. -
Q: Can I get custom thickness or width for my specific roll forming machine?
A: Yes, we support customization. Thicknesses from 0.12mm to 2.0mm and widths from 600mm to 1250mm are available. Please provide your exact requirements, and we will confirm the feasibility. -
Q: What is the typical lead time for this product?
A: Lead time depends on order quantity and specifications. For standard sizes, we can ship within 15–20 days after confirming the order. Custom orders may take 20–30 days. We always strive to meet your schedule. -
Q: Is the Z275 coating suitable for outdoor use in coastal areas?
A: Yes, the Z275 coating (275 g/m²) provides excellent corrosion resistance and is commonly used for roofing in coastal and industrial environments. For extremely aggressive conditions, we can recommend higher coating weights like Z350 or Z450. -
Q: Do you provide samples before bulk order?
A: Absolutely. We can provide small samples (e.g., A4 size or 1-meter strips) for evaluation. The sample cost is usually free, but shipping charges may apply. Contact us for details. -
Q: What packaging options are available for the coils?
A: Standard packaging includes inner diameter protection, moisture-proof paper, steel strapping, and seaworthy export wooden pallets or crates. We can also customize packaging according to your shipping method (container, break bulk, etc.). -
Q: Does your product meet ASTM or JIS standards?
A: Our coil is manufactured in accordance with EN 10346 (DX51D). We can also produce to ASTM A653 or JIS G3302 equivalents upon request. Please specify your required standard when placing an order. -
Q: How do you ensure the quality of each coil?
A: We have a strict quality control system, including testing of chemical composition, mechanical properties, and coating weight at our in-house lab. An ISO9001 certified management system ensures traceability and consistency. We also provide a mill test certificate with each shipment.
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