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Help CenterDX51D+Z275 Galvanized Steel Coil 0.3-2.5mm Thickness for Roofing Sheet ASTM A653 Standard Compliant
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Welcome to Hemaokang Steel (Shandong) Co., Ltd. – your trusted partner in high-quality galvanized steel solutions. With an annual export value exceeding US$50 million and a dedicated team of 51–100 experienced professionals, we are proud to offer the DX51D+Z275 Galvanized Steel Coil with thickness ranging from 0.3 to 2.5 mm, specifically designed for roofing sheet applications. This product strictly complies with the ASTM A653 standard, ensuring outstanding corrosion resistance, durability, and formability. Whether you are a roofing manufacturer, a building contractor, or a steel distributor, our coil delivers consistent performance and cost-efficiency.
Our galvanized steel coil is produced using advanced cold-rolling and hot-dip galvanizing processes, resulting in a uniform zinc coating (Z275) that provides excellent protection against rust and harsh weather. The material is widely used in roofing sheets, wall cladding, gutters, and other structural components. We understand that every project has unique requirements, which is why we offer customizable width, coil inner diameter, and surface finish options to meet your exact specifications.
Key Features & Technical Specifications
| Parameter | Value | Remarks |
| Steel Grade | DX51D | Suitable for forming and bending |
| Zinc Coating | Z275 (275 g/m²) | 3-layer protection (Zn + passive film + oil) |
| Thickness | 0.3 – 2.5 mm | Tolerance: ±0.02 mm |
| Width | 900 – 1250 mm | Custom widths available upon request |
| Standard | ASTM A653 | Also compliant with EN 10142 |
| Surface | Regular spangle / minimized spangle | Zero spangle optional |
| Coil ID | 508 mm or 610 mm | As per customer preference |
| Coil Weight | 3 – 8 tons | Optimized for handling and shipping |
Product Advantages
- Excellent Corrosion Resistance: The Z275 zinc coating (275 g/m²) provides long-lasting protection against moisture, salt, and industrial pollutants, extending the lifespan of roofing sheets.
- Superior Formability: DX51D grade steel ensures easy bending, profiling, and stamping without cracking or delamination, ideal for complex roofing profiles.
- Strict ASTM A653 Compliance: Every coil is tested for mechanical properties, coating weight, and adhesion, guaranteeing consistent quality batch after batch.
- Customizable Dimensions: We offer thickness from 0.3 to 2.5 mm and width from 900 to 1250 mm, with flexible coil ID and weight options to match your production line.
- Cost-Effective Solution: Compared to stainless steel or aluminum, galvanized steel provides a balance of strength, durability, and affordability for roofing projects.
- Wide Application Range: Perfect for residential and commercial roofing, wall panels, corrugated sheets, and agricultural buildings.
Why Choose Hemaokang Steel?
Since our establishment in 2025, we have rapidly grown into a global supplier with an annual export value of US$50 million – US$100 million. Our products are exported to North America, South America, Europe, Southeast Asia, Africa, Oceania, the Middle East, and many other regions. We hold ISO9001:2015 certification, reflecting our commitment to quality management and continuous improvement.
Our factory in Liaocheng, Shandong, China is equipped with advanced production lines, including pickling, cold rolling, hot-dip galvanizing, and slitting, ensuring full control over product quality from raw material to finished coil. Every shipment is accompanied by a Mill Test Certificate and undergoes third-party inspection when required.
We understand that time is money. Our streamlined logistics network ensures on-time delivery, with average lead times of 15–25 days after order confirmation. We also offer free sample for quality evaluation (express freight collect) and provide technical support to help you select the right specification for your roofing project.
Frequently Asked Questions (FAQ)
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Q: What does DX51D+Z275 mean?
A: DX51D is a steel grade suitable for general forming and bending, commonly used for roofing. Z275 indicates a zinc coating weight of 275 g/m² (both sides combined), providing balanced corrosion protection. -
Q: Is this coil suitable for outdoor roofing in coastal areas?
A: Yes, the Z275 coating offers good resistance to salt spray, but for very aggressive coastal environments, we recommend a higher coating weight (e.g., Z350) or additional protective layers. Please consult our technical team. -
Q: What is the difference between ASTM A653 and EN 10142?
A: ASTM A653 is the US standard for galvanized steel, while EN 10142 is the European equivalent. Our product meets both standards, so it can be used in most global markets. -
Q: Can you provide a Material Test Certificate (MTC)?
A: Absolutely. We issue a Mill Test Certificate for every coil, including chemical composition, mechanical properties, and coating weight results. -
Q: How is the coil packaged for sea shipment?
A: Each coil is wrapped with waterproof paper, plastic film, and steel strapping, with edge protectors to prevent damage during transit. Wooden crates or pallets are available upon request. -
Q: What is the minimum order quantity (MOQ)?
A: Our standard MOQ is 25 tons per specification, but we can accommodate smaller trial orders for new customers. Contact us for details. -
Q: Can I get a sample before placing a bulk order?
A: Yes, we offer free samples of A4 size or small pieces. You only need to pay the express shipping cost. Samples are usually shipped within 3 working days. -
Q: How long does production take?
A: For standard specifications, production takes 15–20 days after receiving the deposit. Custom orders may require 20–25 days.
Ready to source high-quality galvanized steel coils for your roofing projects? Contact Hemaokang Steel today. With our ISO9001 certification, extensive global market experience, and dedicated team, we are committed to providing you with reliable products and exceptional service. Request a quote or sample now – we look forward to building a long-term partnership with you!
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