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Help CenterDX51D Full Hard Galvanized Steel Coil 0.25-1.2mm Thick G30-G90 Zinc 750-1250mm Width Metal Processing
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Hemaokang Steel (Shandong) Co., Ltd. is a professional manufacturer and supplier of galvanized steel products, and we are proud to offer our DX51D Full Hard Galvanized Steel Coil. This coil is manufactured to deliver high strength, consistent zinc coating, and reliable dimensional accuracy, making it an ideal input for roll forming, corrugated roofing sheet production, pipe manufacturing, and other metal processing lines. With thickness from 0.25 mm to 1.2 mm, width from 750 mm to 1250 mm, and coating weight from G30 to G90, this product provides flexible solutions for a wide range of industrial needs. Our team is committed to strict quality control and responsive service, ensuring that every order meets your specifications and production schedule.
The term 'Full Hard' refers to the final rolling condition of the steel strip, which has not undergone annealing after the cold rolling process. This results in a high yield strength and a firm, non-springy characteristic that is particularly appreciated in applications requiring rigidity and shape stability. When combined with a hot-dip galvanized coating, the steel coil offers both strength and corrosion resistance, giving processors a material that can be directly used for fabrication without additional heat treatment.
Key Features:
- High strength: Full hard temper provides elevated yield and tensile strength, ideal for structural components.
- Uniform zinc coating: G30–G90 coating options ensure a consistent protective layer with good adhesion and anti-corrosion performance.
- Precise dimensions: Thickness 0.25–1.2 mm and width 750–1250 mm with tight tolerances for stable production.
- Excellent surface quality: Smooth surface with minimum spangle, suitable for painting or further processing.
- Workability: Designed for cutting, stamping, roll forming, bending, and slitting operations.
- Cost-effective: Full hard material often requires fewer processing steps, helping to reduce overall manufacturing costs.
Technical Specifications:
| Parameter | Value |
|---|---|
| Material | DX51D |
| Temper | Full Hard |
| Thickness | 0.25 – 1.2 mm |
| Width | 750 – 1250 mm |
| Zinc Coating | G30 – G90 |
| Surface Treatment | Passivation / Oiling (optional) |
| Spangle | Regular / Minimum (customizable) |
| Coil Inner Diameter | 508 mm / 610 mm (optional) |
| Coil Weight | 3 – 8 tons per coil (customizable) |
Our DX51D full hard galvanized coil is produced through a carefully controlled hot-dip galvanizing line. The base steel is cold rolled to achieve a full hard condition, then cleaned and dipped into a molten zinc bath. This process creates a metallurgical bond between the steel and the zinc layer, providing durable protection against rust and surface damage. The coil can be further processed into roofing sheets, wall cladding, floor decking, corrugated sheets, and various light-gauge structural profiles. Because the material is already galvanized, there is no need for additional painting or coating in many applications, which speeds up production and lowers material handling expenses.
In addition to standard dimensions, we offer a range of processing options to meet your specific needs. Coils can be slitted into narrower widths, cut into sheets, or embossed with different patterns. We also provide skin-passed surfaces for improved flatness, and we can apply chromate-free passivation in accordance with environmental guidelines. Our mill works closely with customers to adjust mechanical properties such as yield strength and elongation within practical limits.
The galvanized coating on this DX51D full hard coil is applied using the continuous hot-dip method, which ensures uniform coating thickness across the entire strip. The zinc layer acts as a sacrificial barrier, protecting the steel from corrosion even when the surface is scratched or cut at the edges. This makes the coil suitable for outdoor components, agricultural equipment, and pre-engineered buildings. For further protection, we recommend storing coils in a dry and ventilated warehouse and avoiding contact with chemicals or seawater.
Benefits for your processing line:
- Improved punchability and die life due to consistent hardness and surface finish.
- Reduced risk of peeling or flaking during bending and forming.
- Stable coil geometry that minimizes downtime and material waste.
- Flexible packaging and slitting options to match your downstream equipment.
Typical applications include roll-formed roof panels, purlins, steel door frames, cable trays, cold-formed steel sections, automotive parts, and general metal fabrication. The full hard temper is especially suitable for products that need a high strength-to-weight ratio without annealing. Our sales engineers can help you select the exact thickness, width, and coating weight for your intended application, and we also welcome request for special dimensions or surface characteristics.
Hemaokang Steel (Shandong) Co., Ltd. is a young but highly capable enterprise with strong export experience. Our annual export value reaches US$50 million to US$100 million, and we serve markets in North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, and many other regions. We operate with a dedicated team of 51–100 employees and hold ISO9001 certification, reflecting our commitment to consistent quality management. All shipments are arranged from Qingdao Port, which ensures efficient logistics and on-time delivery. We invite you to contact us for detailed quotations and technical support; we are ready to provide samples, certifications, and professional advice to help your business succeed.
Frequently Asked Questions:
Q1: What does DX51D mean?
DX51D is a European standard designation for hot-dip galvanized steel for continuous coating. It offers good forming characteristics and is commonly used in general manufacturing and construction.
Q2: What is the difference between G30, G60, and G90?
The G number refers to the zinc coating weight in grams per square meter (applied to both sides). G30 has a lighter coating, while G90 provides a heavier coating and better corrosion protection. Your choice depends on the environment and expected service life.
Q3: Can I get custom thickness and width?
Yes, we support custom specifications within the available range. Please send your required thickness, width, coil inner diameter, and coating weight, and our team will confirm feasibility and lead time.
Q4: Is this full hard coil suitable for bending?
Full hard material has higher yield strength and is less formable than annealed material. It is suited for simple bending and roll forming where springback is controlled. For complex deep drawing, a softer temper may be recommended.
Q5: What about packaging and loading?
Coils are packed with anti-rust paper, steel strapping, and protective edge covers, then loaded into containers or flat racks from Qingdao Port. Custom packaging is available on request.
Q6: Do you provide samples before bulk order?
Yes, samples are available. We can cut small pieces from current stock for your quality verification. Please communicate your application so we can recommend the most suitable grade and coating.
Q7: What is the typical delivery time?
For standard specifications, delivery usually takes 15–25 days after deposit. For customized coils or large quantities, the schedule depends on production availability and slot.
Q8: What quality documents are available?
We can provide material certificates, mill test reports, packing lists, and other required documents. Our quality team ensures traceability from raw material to final inspection.
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