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Technical Specifications
Product Overview
Metallurgical Characteristics
Fatigue Proof Steel features a tempered martensitic microstructure with fine carbide precipitation, providing exceptional resistance to crack initiation and propagation under cyclic loading. The controlled addition of chromium, molybdenum, and vanadium enhances hardenability and promotes uniform strength distribution throughout the cross-section, critical for structural applications requiring long-term fatigue resistance.
Heat Treatment Process
MetalZenith employs controlled austenitizing at 870-920°C followed by water quenching and tempering at 580-650°C. This precise heat treatment cycle ensures optimal balance between strength, toughness, and fatigue resistance while maintaining excellent weldability for structural fabrication requirements.
Advanced Manufacturing Process
Our state-of-the-art production facility utilizes electric arc furnace melting with secondary refining, continuous casting, and controlled rolling to achieve superior cleanliness and homogeneity. Advanced inclusion control and degassing processes ensure exceptional fatigue performance and structural integrity.
Specialized Quality Testing
MetalZenith conducts comprehensive testing including high-cycle fatigue analysis up to 10? cycles, welding procedure qualification testing per AWS D1.1, cold forming capability assessment, and accelerated atmospheric corrosion testing. Our quality assurance program ensures consistent performance in demanding structural applications.
Structural Engineering Applications
Fatigue Proof Steel is specifically designed for critical structural applications including bridge girders subjected to traffic loading, building frameworks in seismic zones, heavy machinery components with cyclic stress patterns, automotive structural elements requiring crash performance, and general engineering applications where fatigue life is paramount. The material's superior crack resistance and weldability make it ideal for complex structural fabrications.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.15 - 0.21 |
| Manganese (Mn) | 1.10 - 1.50 |
| Silicon (Si) | 0.20 - 0.55 |
| Phosphorus (P) | ≤ 0.020 |
| Sulfur (S) | ≤ 0.015 |
| Chromium (Cr) | 0.40 - 0.65 |
| Molybdenum (Mo) | 0.15 - 0.25 |
| Vanadium (V) | 0.03 - 0.08 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 690 |
| Tensile Strength (MPa) | 760 - 895 |
| Elongation (%) | ≥ 18 |
| Impact Energy at -40°C (J) | ≥ 34 |
| Hardness (HB) | 230 - 280 |
| Fatigue Strength (MPa) | ≥ 310 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.85 |
| Melting Point (°C) | 1480 - 1520 |
| Thermal Conductivity (W/m·K) | 42.7 |
| Thermal Expansion (×10??/K) | 12.3 |
| Elastic Modulus (GPa) | 210 |
| Poisson's Ratio | 0.27 - 0.30 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Plates, Beams, Channels, Angles, Bars, Custom Sections |
| Thickness Range | 8 - 150mm |
| Width Range | 1200 - 4200mm |
| Length Range | 6000 - 20000mm |
| Standards Compliance | ASTM A514, ASTM A709, AWS D1.1, EN 10025 |
| Heat Treatment Condition | Quenched and Tempered |
| Surface Finish | Hot Rolled, Shot Blasted, Pickled |
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Our Advantages in Processing Fatigue Proof Steel
Advanced Thermomechanical Processing
MetalZenith employs controlled rolling with precise temperature monitoring and optimized cooling rates to achieve superior grain structure and enhanced fatigue resistance. Our advanced processing ensures consistent mechanical properties and exceptional crack propagation resistance throughout the material thickness.
Comprehensive Fatigue Testing & Quality Control
MetalZenith conducts extensive fatigue testing including high-cycle fatigue analysis, welding performance evaluation, forming capability assessment, and atmospheric corrosion resistance testing. Our rigorous quality control ensures optimal performance in structural applications subjected to cyclic loading.
Custom Structural Solutions & Technical Support
MetalZenith provides tailored processing solutions including custom heat treatment, precision cutting, and specialized forming services. Our technical team offers comprehensive support for structural design optimization and application-specific material selection to meet unique project requirements.
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