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Technical Specifications
Product Overview
Metallurgical Characteristics
S275JR exhibits a ferritic-pearlitic microstructure typical of low-carbon structural steels. The controlled carbon content and manganese addition provide optimal balance between strength and ductility, while maintaining excellent weldability. The fine grain structure achieved through controlled rolling enhances both strength and toughness properties essential for structural applications.
Heat Treatment Process
MetalZenith employs controlled hot rolling at temperatures between 1050-1200°C followed by controlled cooling to achieve optimal mechanical properties. For enhanced performance, normalization at 880-920°C may be applied to refine grain structure and improve impact toughness, particularly for thicker sections used in critical structural applications.
Manufacturing Process Excellence
Our advanced manufacturing process includes continuous casting, controlled rolling with precise temperature monitoring, and accelerated cooling techniques. MetalZenith's state-of-the-art rolling mills ensure consistent thickness tolerance and superior surface quality, while our quality control systems monitor chemical composition and mechanical properties throughout production.
Specialized Quality Testing
Comprehensive testing protocols include welding performance evaluation using standard procedures, bend testing for formability assessment, rotating beam fatigue testing for cyclic loading applications, and accelerated atmospheric corrosion testing. These specialized tests ensure S275JR steel meets the demanding requirements of structural engineering applications.
Application Engineering Considerations
For building construction, S275JR provides excellent strength-to-weight ratio and weldability for framework assembly. In bridge engineering, the material's fatigue resistance and atmospheric corrosion properties are optimized through proper design considerations. Mechanical manufacturing benefits from the steel's machinability and forming characteristics, while vehicle construction applications leverage its impact resistance and joining capabilities.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.21 |
| Manganese (Mn) | ≤ 1.50 |
| 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) | 275 |
| Tensile Strength (MPa) | 410 - 560 |
| Elongation (%) | ≥ 20 |
| Impact Energy at 20°C (J) | ≥ 27 |
| Hardness (HB) | 120 - 170 |
| Fatigue Strength (MPa) | 180 - 220 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.85 |
| Melting Point (°C) | 1510 - 1540 |
| 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 - 12000mm |
| Standards Compliance | EN 10025-2, ASTM A36, JIS G3101 |
| Delivery Condition | Hot Rolled, Normalized |
| Surface Finish | Mill Scale, Shot Blasted, Pickled |
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Our Advantages in Processing S275JR
Controlled Hot Rolling Technology
MetalZenith utilizes advanced controlled hot rolling with precise temperature monitoring and cooling rates to achieve optimal grain structure in S275JR steel. Our sophisticated rolling process ensures consistent mechanical properties, excellent surface finish, and enhanced formability throughout the material cross-section.
Comprehensive Structural Testing
Our quality assurance program includes specialized testing for structural applications: welding performance evaluation, bend testing for formability, fatigue strength assessment, and atmospheric corrosion resistance testing. These comprehensive tests ensure S275JR steel meets demanding structural engineering requirements.
Custom Fabrication Services
MetalZenith provides complete custom processing services including cutting, forming, welding preparation, and surface treatment. Our technical support team works closely with structural engineers to optimize material specifications and processing parameters for specific construction and engineering applications.
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