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Technical Specifications
Product Overview
Metallurgical Characteristics
S355JR exhibits a predominantly ferritic-pearlitic microstructure with fine grain size achieved through controlled rolling processes. The balanced carbon and manganese content provides optimal strength while maintaining excellent weldability and formability. The microstructure ensures uniform mechanical properties and predictable behavior under structural loading conditions.
Heat Treatment Process
MetalZenith employs controlled hot rolling at temperatures between 1050-1200°C followed by controlled cooling to achieve optimal mechanical properties. Normalization at 880-920°C may be applied for enhanced uniformity and stress relief, ensuring dimensional stability and improved machinability for structural applications.
Manufacturing Excellence
Our advanced production process incorporates continuous casting, controlled rolling with precise temperature monitoring, and accelerated cooling techniques. This ensures consistent chemical composition, refined grain structure, and superior surface quality. Real-time process control systems maintain tight tolerances and optimal mechanical properties throughout production.
Structural Performance Testing
MetalZenith conducts comprehensive testing including welding performance evaluation using standard procedures, bend testing for formability assessment, fatigue strength testing under cyclic loading, and atmospheric corrosion resistance testing. Impact testing at various temperatures ensures reliable performance in diverse environmental conditions typical of structural applications.
Application Engineering
For building construction, S355JR provides excellent strength-to-weight ratio and seismic resistance. In bridge engineering, its fatigue resistance and weldability enable complex joint designs. For machinery manufacturing, the material offers superior machinability and dimensional stability. In vehicle construction, it provides crash resistance and weight optimization. General engineering applications benefit from its versatility and reliable mechanical properties across temperature ranges.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.24 |
| Manganese (Mn) | ≤ 1.60 |
| Silicon (Si) | ≤ 0.55 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.045 |
| Nitrogen (N) | ≤ 0.012 |
| Copper (Cu) | ≤ 0.55 |
⚙️ 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 - 150mm |
| Width Range | 1000 - 3200mm |
| Length Range | 6000 - 12000mm |
| Standards Compliance | EN 10025-2, ASTM A572, JIS G3106 |
| Heat Treatment Condition | Hot Rolled, Normalized |
| Surface Finish | Mill Scale, Shot Blasted, Pickled |
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Our Advantages in Processing S355JR
Advanced Controlled Rolling Technology
MetalZenith employs precision controlled rolling with optimized temperature profiles and reduction schedules to achieve superior grain structure and enhanced mechanical properties. Our advanced processing ensures consistent strength and toughness throughout the material cross-section, critical for structural integrity.
Comprehensive Structural Testing
Our S355JR undergoes rigorous testing including welding performance evaluation, bend testing for formability, fatigue strength analysis, and atmospheric corrosion resistance testing. This comprehensive quality assurance ensures optimal performance in demanding structural applications.
Custom Fabrication Services
MetalZenith provides complete custom processing services including cutting, forming, welding preparation, and heat treatment modifications. Our technical team offers engineering support for structural design optimization and material selection guidance for specific applications.
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