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Technical Specifications
Product Overview
Metallurgical Structure and Properties
DP 1000 dual phase steel features a carefully engineered microstructure consisting of a soft ferritic matrix (60-80%) reinforced with hard martensite islands (20-40%). This unique dual-phase architecture provides an exceptional combination of high strength and good formability, making it ideal for automotive lightweighting applications.
Manufacturing Process
MetalZenith produces DP 1000 through controlled hot rolling followed by precise continuous annealing. The steel is heated to the intercritical temperature range (750-820°C) where austenite and ferrite coexist, then rapidly cooled to transform austenite to martensite while preserving the ferritic matrix. This process requires precise temperature control and cooling rates to achieve optimal mechanical properties.
Heat Treatment and Processing
The continuous annealing process includes soaking at intercritical temperatures, controlled cooling through the transformation zone, and final tempering if required. MetalZenith's advanced process control systems monitor temperature profiles, atmosphere composition, and cooling rates to ensure consistent microstructural development and mechanical properties throughout each coil.
Quality Standards and Testing
All DP 1000 production undergoes comprehensive quality testing including tensile testing per ASTM A370, metallographic analysis for phase fraction determination, hole expansion testing per ISO 16630, and surface quality inspection. MetalZenith maintains full traceability from raw materials through final inspection, ensuring compliance with automotive quality standards including IATF 16949 and customer-specific requirements.
Forming and Welding Characteristics
DP 1000 exhibits excellent stretch flangeability and bendability due to its dual-phase microstructure. The material is readily weldable using resistance spot welding, laser welding, and arc welding processes. Proper welding parameters and post-weld heat treatment may be required for critical applications to maintain joint integrity and corrosion resistance.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.06 - 0.12 |
| Manganese (Mn) | 1.20 - 2.50 |
| Silicon (Si) | 0.10 - 0.80 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.015 |
| Chromium (Cr) | 0.20 - 0.80 |
| Molybdenum (Mo) | 0.05 - 0.30 |
| Aluminum (Al) | 0.015 - 0.070 |
| Niobium (Nb) | 0.015 - 0.050 |
| Titanium (Ti) | 0.010 - 0.040 |
| Vanadium (V) | 0.01 - 0.10 |
| Boron (B) | 0.0005 - 0.0050 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (Rm) | 980 - 1180 MPa |
| Yield Strength (Rp0.2) | ≥ 700 MPa |
| Elongation (A80) | ≥ 10% |
| Uniform Elongation (Ag) | ≥ 6% |
| Hardness (HV10) | 320 - 380 |
| Bake Hardening (BH2) | ≥ 30 MPa |
| r-value (r90) | ≥ 0.7 |
| n-value (n10-20) | ≥ 0.12 |
| Hole Expansion Ratio (λ) | ≥ 40% |
| Fatigue Limit (2×106 cycles) | 350 - 420 MPa |
| Impact Energy (Charpy V, 20°C) | ≥ 80 J |
| Young's Modulus | 210 GPa |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1510 - 1530°C |
| Thermal Expansion Coefficient (20-100°C) | 12.5×10-6/K |
| Thermal Conductivity (20°C) | 52 W/m·K |
| Specific Heat Capacity | 460 J/kg·K |
| Electrical Resistivity (20°C) | 0.18 µΩ·m |
| Magnetic Permeability | Ferromagnetic |
| Curie Temperature | 770°C |
| Poisson's Ratio | 0.27 - 0.30 |
| Shear Modulus | 82 GPa |
| Bulk Modulus | 170 GPa |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Hot-rolled coil, Cold-rolled coil, Cut-to-length sheets, Blanks |
| Thickness Range | 0.8 - 4.0 mm |
| Width Range | 600 - 2100 mm |
| Coil Weight | Up to 35 tons |
| Standards Compliance | EN 10338, ASTM A1088, JIS G3135, VDA 239-100 |
| Surface Finish | Mill finish, Oiled, Phosphated, Galvanized (GI), Galvannealed (GA) |
| Coating Weight (Galvanized) | 60 - 275 g/m² |
| Thickness Tolerance | ± 0.02 - 0.05 mm |
| Width Tolerance | ± 2.0 mm |
| Flatness | ≤ 5 I-units |
| Edge Condition | Mill edge, Trimmed edge, Slit edge |
| Packaging | Eye-to-sky, Eye-to-wall, Custom packaging available |
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Our Advantages in Processing DP 1000
Advanced Continuous Annealing Technology
MetalZenith's cutting-edge continuous annealing lines feature precise temperature control and atmosphere management, enabling optimal dual-phase microstructure development. Our proprietary thermal processing ensures consistent ferrite-martensite distribution, delivering superior mechanical properties and formability in every coil.
Comprehensive Quality Control Systems
Our integrated quality management system includes real-time process monitoring, advanced metallographic analysis, and statistical process control. Every batch undergoes rigorous mechanical testing, surface inspection, and dimensional verification to guarantee compliance with automotive and structural standards.
Flexible Production & Global Supply Chain
MetalZenith offers customized chemical compositions, mechanical properties, and surface treatments to meet specific application requirements. Our global distribution network and just-in-time delivery capabilities ensure reliable supply chain support for automotive OEMs and tier suppliers worldwide.
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