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Technical Specifications
Product Overview
Metallurgical Characteristics
TRIP 780 features a complex multiphase microstructure consisting of ferrite, bainite, martensite, and 5-15% retained austenite. The retained austenite transforms to martensite during deformation, providing the transformation-induced plasticity effect that delivers exceptional work hardening and energy absorption capabilities essential for structural applications.
Heat Treatment Process
MetalZenith employs intercritical annealing at 760-800°C followed by controlled cooling through the bainite transformation range. This precise thermal processing optimizes the volume fraction and carbon content of retained austenite while achieving the desired balance of ferrite, bainite, and martensite phases.
Manufacturing Process Excellence
Our continuous annealing line features advanced atmosphere control, precise temperature uniformity (±5°C), and optimized cooling rates to ensure consistent microstructural development. Real-time monitoring of carbon potential and dew point maintains optimal processing conditions for maximum TRIP effect activation.
Specialized Quality Testing
MetalZenith conducts comprehensive testing including: welding performance evaluation with HAZ analysis, complex forming simulation using Erichsen and limiting dome height tests, high-cycle fatigue testing up to 10? cycles, and accelerated atmospheric corrosion testing per ASTM B117 to validate long-term structural performance.
Structural Application Engineering
For building construction, TRIP 780 provides excellent seismic resistance through superior energy absorption. In bridge engineering, the high fatigue strength ensures long service life under cyclic loading. For machinery manufacturing, the combination of strength and formability enables complex component geometries. In vehicle construction, the crash performance and weight reduction capabilities optimize safety and efficiency in structural designs.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.15 - 0.25 |
| Manganese (Mn) | 1.50 - 2.50 |
| Silicon (Si) | 0.80 - 1.50 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.015 |
| Aluminum (Al) | 0.020 - 0.080 |
| Chromium (Cr) | 0.30 - 0.80 |
| Molybdenum (Mo) | 0.10 - 0.30 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 480 |
| Tensile Strength (MPa) | 780 - 980 |
| Elongation (%) | ≥ 25 |
| Impact Energy at 20°C (J) | ≥ 120 |
| Hardness (HV) | 240 - 300 |
| Fatigue Strength (MPa) | ≥ 350 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.85 |
| Melting Point (°C) | 1480 - 1520 |
| Thermal Conductivity (W/m·K) | 42.5 |
| Thermal Expansion (×10??/K) | 12.5 |
| Elastic Modulus (GPa) | 210 |
| Poisson's Ratio | 0.30 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Sheets, Coils, Plates, Strips, Custom Blanks |
| Thickness Range | 0.8 - 8.0mm |
| Width Range | 600 - 2100mm |
| Length Range | 1000 - 6000mm |
| Standards Compliance | ASTM A1011, EN 10338, JIS G3135 |
| Heat Treatment Condition | Intercritical Annealed + Controlled Cooling |
| Surface Finish | Hot Rolled, Cold Rolled, Galvanized |
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Our Advantages in Processing TRIP 780 Steel
Advanced Intercritical Annealing Process
MetalZenith utilizes precision-controlled intercritical annealing with real-time temperature monitoring and controlled cooling rates to optimize the retained austenite content. Our advanced processing ensures maximum TRIP effect activation, delivering exceptional strength-ductility balance for demanding structural applications.
Comprehensive Structural Performance Testing
Our quality assurance includes specialized testing for structural applications: advanced welding performance evaluation, complex forming simulation testing, high-cycle fatigue strength assessment, and accelerated atmospheric corrosion resistance testing to ensure optimal performance in building and infrastructure applications.
Customized Processing & Engineering Support
MetalZenith provides tailored heat treatment schedules, custom dimensional specifications, and comprehensive technical support including forming guidelines, welding procedures, and structural design assistance to optimize TRIP 780 performance for specific engineering applications.
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