DP800 STEEL – AUTOMOTIVE STEEL
DP800 STEEL – AUTOMOTIVE STEEL
DP800 steel is high-strength dual-phase steel, where “DP” stands for “Dual Phase,” indicating its microstructure is composed of a soft ferrite matrix and hard martensite islands. The “800” represents its minimum tensile strength of 800 MPa. This combination of phases gives DP800 steel an excellent balance of high strength and good ductility, making it ideal for automotive applications, particularly in body panels, structural components, and safety parts. The steel is designed to provide enhanced crash performance while maintaining formability for complex shapes.
Description
What is DP800
DP800 is a high-strength dual-phase steel composed of approximately 98-99% iron and 1-2% alloying elements such as carbon, manganese, and silicon. It is typically available in solid, flat sheet, or coil forms and has a metallic grey appearance. As a dual-phase steel, DP800 combines high tensile strength with good ductility, offering a balance of strength and formability. It is primarily used in the automotive industry for manufacturing body panels, structural components, and safety parts, where strength and energy absorption are critical. DP800 is processed through hot rolling and cold rolling to achieve its mechanical properties.Characteristics of DP800
DP800 is an ultra-high-strength steel known for its excellent formability, making it ideal for complex automotive components. It features a low yield strength ratio, high work-hardening index, and bake-hardening properties, ensuring superior formability during processing. DP800 also offers outstanding wear resistance, making it suitable for automotive parts that require durability. Widely used in automotive structural components such as frames and doors, DP800 meets the industry’s high demands for strength and safety. Additionally, it has good weldability, with welded joints showing mechanical properties and microstructures similar to the base material, allowing for effective connections using methods like laser welding.Chemical Compositions
| Element | Composition (approx) |
|---|---|
| Carbon (C) | 0.12% – 0.20% |
| Manganese (Mn) | 1.00% – 2.00% |
| Phosphorus (P) | ≤ 0.025% |
| Sulfur (S) | ≤ 0.010% |
| Silicon (Si) | ≤ 0.50% |
| Aluminum (Al) | 0.015% – 0.050% |
Physical Properties
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cm³ | 0.283 lb/in³ |
| Melting Point | 1425-1460°C | 2597-2660°F |
| Boiling Point | Not typically specified | Not typically specified |
| Thermal Conductivity | 40-50 W/m·K | 23-29 Btu·ft/h·ft²·°F |
| Electrical Conductivity | 10-15% IACS | 10-15% IACS |
| Specific Heat Capacity | 450-500 J/kg·K | 0.108-0.119 Btu/lb·°F |
| Thermal Expansion Coefficient | 11-13 × 10⁻⁶ /°C | 6.1-7.2 × 10⁻⁶ /°F |
| Electrical Resistivity | 0.2-0.4 µΩ·m | 0.12-0.24 µΩ·ft |
Mechanical Properties
| Property | Metric | Imperial |
|---|---|---|
| Tensile Strength | 800 MPa | 116,000 psi |
| Yield Strength | 500-600 MPa | 72,500-87,000 psi |
| Brinell Hardness (HB) | 200-250 HB | 200-250 HB |
| Rockwell Hardness (HRC) | 20-30 HRC | 20-30 HRC |
| Vickers Hardness (HV) | 210-260 HV | 210-260 HV |
| Elongation | ≥10-20% | ≥10-20% |
| Elastic Modulus | 200 GPa | 29,000 ksi |
Industries & Applications
| Industry | Products |
|---|---|
| Automotive Body Structures | Body Panels, Reinforcements, Crash Structures, Roof Rails |
| Safety Components | B-Pillars, Side Impact Beams, Roof Rails, Floor Structures |
| Structural Parts Requiring High Strength | Frames, Subframes, Cross Members, Underbody Shields |
| Chassis Parts | Chassis Frames, Subframes, Crossbeams, Side Rails |
| Suspension Systems | Control Arms, Springs, Linkages, Stabilizer Bars |
| Heavy Machinery | Machine Frames, Loader Arms, Boom Arms, Heavy Duty Axles |
Machining
DP800 Heat Treating Instructions: DP800 steel is processed through controlled rolling and cooling to achieve its dual-phase microstructure, which provides a balance of high strength and good ductility. Additional heat treatment, such as quenching and tempering, is not required.
DP800 Surface Finish: DP800 steel can be treated with various surface finishes, such as galvanizing, painting, or coating, to enhance corrosion resistance and improve durability, depending on the specific application.
Custom grades can be produced upon request to meet specific requirements.
Our Service
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