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Technical Specifications
Product Overview
Metallurgical Characteristics
S355J2H exhibits a fine-grained ferritic-pearlitic microstructure achieved through controlled rolling and normalization processes. The optimized chemical composition with controlled carbon content and balanced manganese levels provides excellent strength-toughness combination while maintaining superior weldability for structural applications.
Heat Treatment Process
MetalZenith employs controlled rolling at temperatures between 850-950°C followed by air cooling or normalization at 890-930°C. This thermomechanical processing ensures grain refinement, uniform mechanical properties, and optimal microstructural development for enhanced structural performance.
Manufacturing Excellence
Our advanced production facilities utilize electric arc furnace steelmaking with secondary refining, continuous casting, and precision hot rolling. Real-time process monitoring and automated quality control systems ensure consistent chemical composition and mechanical properties throughout production.
Specialized Quality Testing
MetalZenith conducts comprehensive testing including welding procedure qualification, bend testing for formability assessment, rotating beam fatigue testing, and accelerated atmospheric corrosion testing. Our quality assurance program includes ultrasonic testing, magnetic particle inspection, and dimensional verification to ensure structural integrity.
Application Engineering
For building construction, S355J2H provides optimal strength-to-weight ratios and excellent welding characteristics. In bridge engineering, the steel's impact toughness and fatigue resistance ensure long-term structural reliability. For machinery manufacturing, the material's formability and machinability enable complex component fabrication. In vehicle construction, the steel's crashworthiness and weight efficiency contribute to safety and performance optimization.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.20 |
| Manganese (Mn) | 1.00 - 1.60 |
| Silicon (Si) | ≤ 0.55 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.025 |
| Nitrogen (N) | ≤ 0.012 |
| Copper (Cu) | ≤ 0.55 |
| Chromium (Cr) | ≤ 0.30 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 355 |
| Tensile Strength (MPa) | 470 - 630 |
| Elongation (%) | ≥ 20 |
| Impact Energy at -20°C (J) | ≥ 27 |
| Hardness (HB) | 140 - 190 |
| Fatigue Strength (MPa) | 160 - 180 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.85 |
| Melting Point (°C) | 1450 - 1520 |
| Thermal Conductivity (W/m·K) | 50.2 |
| Thermal Expansion (×10??/K) | 12.0 |
| Elastic Modulus (GPa) | 210 |
| Poisson's Ratio | 0.30 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Plates, Sheets, Beams, Channels, Angles, Bars |
| Thickness Range | 3 - 80mm |
| Width Range | 1000 - 3200mm |
| Length Range | 6000 - 15000mm |
| Standards Compliance | EN 10025-2, ASTM A572, JIS G3106 |
| Heat Treatment Condition | Normalized or Hot Rolled |
| Surface Finish | Hot Rolled, Pickled, Shot Blasted |
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Our Advantages in Processing S355J2H Steel
Advanced Thermomechanical Processing
MetalZenith utilizes controlled rolling technology with precise temperature control and optimized cooling rates to achieve fine-grain microstructure in S355J2H steel. Our advanced processing ensures uniform mechanical properties, enhanced strength-to-weight ratio, and superior weldability throughout the material cross-section.
Comprehensive Structural Testing
Our S355J2H steel undergoes extensive testing including welding performance evaluation, bend testing for formability, fatigue strength analysis, and atmospheric corrosion resistance testing. MetalZenith's quality assurance program ensures optimal performance in structural applications with guaranteed impact toughness at sub-zero temperatures.
Custom Fabrication Services
MetalZenith provides comprehensive custom processing services including precision cutting, forming, welding preparation, and heat treatment optimization. Our technical support team works closely with structural engineers to deliver S355J2H steel products tailored to specific construction and engineering requirements.
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