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Dual Phase Steel 780DP Steel Coils
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At SteelPro Group, we are dedicated to providing premium-quality steel solutions tailored to the needs of industries worldwide. In this article, we’ll explore the properties, manufacturing process, and applications of 780DP steel coils, and how they can meet your project requirements.
What Is 780DP Steel?
780DP steel is a strong and lightweight material with a tensile strength of about 780 MPa. It has a mix of ferrite for flexibility and martensite for strength. It is good for making lighter and safer designs. The material absorbs impact energy well, making it ideal for safety parts. It is easy to weld and shape for complex structures. Common uses are car frames, crash zones, and industrial equipment. The steel is produced through controlled rolling and cooling processes, often with protective coatings for durability.
Comparison with Other AHSS Grades
- Stronger than DP590, making it suitable for components requiring higher load-bearing capacity.
- Lower formability than DP590 but is better than higher-strength steels like DP980.
- More weldable than fully martensitic steels, though slightly less formable.
780DP Steel Coils Dimensions Range and Certifications
We offer DP780 steel coils in various sizes to suit various industrial needs. Custom dimensions and processing options are also available.
Our DP780 steel coils meet global quality standards, including ISO 9001, SAE J2340, and EN 10346, ensuring consistent performance and reliability.
- Thickness: 1.0 mm to 3.0 mm (0.04 in to 0.12 in).
- Width: 900 mm to 1,800 mm (35.4 in to 70.9 in).
- Length: Customizable up to 12,000 mm (472.4 in).
780DP Steel Chemical Composition
| Element | Composition (%) |
| Carbon (C) | ≤ 0.15 |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 0.5 |
| Phosphorus (P) | ≤ 0.03 |
| Sulfur (S) | ≤ 0.025 |
| Niobium (Nb) | ≤ 0.09 |
| Titanium (Ti) | ≤ 0.15 |
| Aluminum (Al) | ≥ 0.015 |
780DP Steel Mechanical Properties
| Property | Metric Value | Imperial Value |
| Yield Strength | 450–550 MPa | 65.3–79.8 ksi |
| Tensile Strength | ≥ 780 MPa | ≥ 113.1 ksi |
| Elongation (A80) | ≥ 12% | ≥ 12% |
780DP Steel Applications
| Automotive | Crash-resistant parts | Door beams, side intrusion bars, bumper reinforcements |
| Structural components | Chassis frames, cross-members, roof supports | |
| Body panels | Inner door panels, lightweight components | |
| Industrial Equipment | Heavy-duty frames and supports | Machinery frames, structural components for industrial equipment |
| Construction | Load-bearing structures | Modular frameworks, wall panels, roofing systems |
| Lightweight structural profiles | Beams, supports for buildings and high-performance structures | |
| Storage Systems | High-load-capacity storage solutions | Shelving systems, pallet racks |
780DP Steel Coil Manufacturing Processes
The production of DP780 steel coils follows five key steps to ensure its high strength and flexibility:
1. Hot Rolling
Steel slabs are heated to 1,100°C–1,250°C and rolled to reduce thickness. This step sets the base for the steel’s strength and shape.
2. Pickling
The hot-rolled steel is cleaned in an acid bath to remove surface oxides and impurities. This ensures the steel has a smooth and clean surface for further processing.
3. Cold Rolling
The material undergoes cold rolling to attain the required thickness and enhance the surface finish. This step increases the steel’s strength and accuracy.
4. Annealing
The steel is heated to 850°C–950°C, where ferrite and austenite phases form. Rapid cooling turns austenite into martensite, while ferrite stays soft, creating DP780’s dual-phase structure.
5. Surface Coating (Optional)
A protective layer, such as zinc or zinc-magnesium, is applied to improve corrosion resistance. This makes the steel more durable in tough conditions.
At SteelPro Group, we offer a wide range of additional services for DP780 steel coils to meet your specific project needs. These include custom cutting, slitting, welding, punching, and forming. We also provide different coatings for improved performance.
Surface Selection for 780DP Steel Coils
| Coating Type | Coating Thickness |
| GI (Zinc) | GI50/50, GI60/60, GI115/115 |
| ZA (Zinc-Aluminum Alloy) | ZA55/55, ZA70/70 |
| GA (Galvalume) | GA55/55, GA70/70 |
With our advanced equipment and skilled team, we ensure every coil is processed to the highest standards, saving you time and reducing material waste.
Choose SteelPro Group for the Best 780DP Steel Coils
At SteelPro Group, we guarantee that all DP780 or DP800 steel coils comply with rigorous quality requirements and are customized to fit your unique specifications. Leveraging state-of-the-art processing technology and a dedication to superior quality, we deliver solutions designed to improve safety, performance, and longevity.
Our Key Offerings:
- Custom sizes and processing options.
- Certified materials for consistent performance.
- Expert support to help you choose the right steel for your project.
