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Technical Specifications
Product Overview
Metallurgical Characteristics
SA 455 is a high-strength low-alloy (HSLA) structural steel with a fine-grained ferritic-pearlitic microstructure. The controlled addition of microalloying elements such as vanadium and columbium promotes grain refinement and precipitation strengthening, resulting in superior mechanical properties while maintaining excellent weldability and formability.
Heat Treatment Process
MetalZenith employs controlled rolling followed by normalization at 900-950°C with controlled cooling rates to achieve optimal microstructural development. Our precise temperature control and cooling protocols ensure consistent mechanical properties and dimensional stability throughout the material cross-section.
Manufacturing Process
Our SA 455 steel production utilizes advanced electric arc furnace technology with secondary refining processes including ladle metallurgy and vacuum degassing. The controlled rolling process with optimized reduction schedules ensures superior surface quality and mechanical property uniformity.
Structural Quality Testing
MetalZenith conducts comprehensive testing specific to structural applications including welding performance evaluation per AWS D1.1, forming capability assessment through bend testing, fatigue strength testing under cyclic loading, and atmospheric corrosion resistance testing to ensure long-term durability in outdoor structural applications.
Application Engineering Considerations
For building construction applications, SA 455 provides excellent strength-to-weight ratios enabling lighter structural designs. In bridge engineering, the superior fatigue resistance ensures long service life under dynamic loading. For machinery manufacturing, the combination of high strength and good machinability facilitates efficient fabrication. In vehicle manufacturing, the excellent forming characteristics enable complex component geometries while maintaining structural integrity.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.23 |
| Manganese (Mn) | 1.35 - 1.65 |
| Silicon (Si) | 0.15 - 0.40 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
| Vanadium (V) | 0.02 - 0.15 |
| Columbium (Cb) | 0.005 - 0.05 |
| Nitrogen (N) | ≤ 0.015 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 455 |
| Tensile Strength (MPa) | 570 - 725 |
| Elongation (%) | ≥ 18 |
| Impact Energy at 0°C (J) | ≥ 27 |
| Hardness (HB) | 170 - 230 |
| Fatigue Strength (MPa) | ≥ 200 |
🔬 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) | 11.8 |
| Elastic Modulus (GPa) | 200 |
| Poisson's Ratio | 0.27 - 0.30 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Plates, Sheets, Beams, Channels, Angles, Bars |
| Thickness Range | 5 - 200mm |
| Width Range | 1000 - 3500mm |
| Length Range | 6000 - 15000mm |
| Standards Compliance | ASTM A572 Grade 65, ASTM A588, AWS D1.1 |
| Heat Treatment Condition | Normalized or As-Rolled |
| Surface Finish | Mill Scale, Pickled, Shot Blasted |
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Our Advantages in Processing SA 455 Steel
Advanced Thermomechanical Processing
MetalZenith employs controlled rolling and precise normalization processes with real-time temperature monitoring to achieve optimal grain structure and enhanced mechanical properties. Our advanced processing ensures consistent strength and toughness throughout the material thickness, specifically optimized for structural applications.
Comprehensive Structural Testing
Our SA 455 steel undergoes rigorous testing including welding performance evaluation, forming capability assessment, fatigue strength testing, and atmospheric corrosion resistance analysis. These specialized tests ensure superior performance in demanding structural applications.
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 customers to ensure optimal material performance for specific structural applications.
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