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Technical Specifications
Product Overview
Metallurgical Characteristics
HSLA 550 features a fine-grained ferritic microstructure with controlled precipitation of microalloying elements including niobium, titanium, and vanadium. The thermomechanical processing creates uniform grain refinement and optimized carbide distribution, resulting in exceptional strength-to-weight ratio and superior formability compared to conventional carbon steels.
Heat Treatment Process
MetalZenith employs controlled rolling at temperatures between 850-950°C followed by accelerated cooling to achieve optimal microstructural development. The precise temperature control during deformation and cooling ensures maximum precipitation strengthening while maintaining excellent ductility and toughness properties.
Manufacturing Process Excellence
Our advanced production process incorporates continuous casting, controlled rolling mills with precise temperature monitoring, and accelerated cooling systems. MetalZenith's integrated quality control ensures consistent mechanical properties, surface quality, and dimensional accuracy throughout the entire production cycle.
Specialized Quality Testing
MetalZenith conducts comprehensive testing protocols specific to high-strength applications including formability testing (Erichsen cupping, bend testing), weldability assessment (HAZ hardness, crack susceptibility), hydrogen-induced cracking resistance evaluation, and delayed fracture testing under stress conditions. These specialized tests ensure optimal performance in demanding applications.
Application-Specific Technical Considerations
For automotive applications, HSLA 550 provides excellent crash energy absorption and weight reduction capabilities. In construction and bridge engineering, the steel offers superior fatigue resistance and seismic performance. For lifting equipment and pressure vessels, the material delivers exceptional strength reliability and resistance to cyclic loading, making it ideal for safety-critical applications.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.12 |
| Manganese (Mn) | 1.20 - 1.60 |
| Silicon (Si) | 0.15 - 0.50 |
| Phosphorus (P) | ≤ 0.020 |
| Sulfur (S) | ≤ 0.010 |
| Aluminum (Al) | 0.020 - 0.060 |
| Niobium (Nb) | 0.015 - 0.050 |
| Titanium (Ti) | 0.010 - 0.040 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 550 |
| Tensile Strength (MPa) | 620 - 780 |
| Elongation (%) | ≥ 16 |
| Impact Energy at -20°C (J) | ≥ 35 |
| Fatigue Strength (MPa) | 280 - 320 |
| Hardness (HB) | 180 - 220 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.85 |
| Melting Point (°C) | 1510 - 1540 |
| Thermal Conductivity (W/m·K) | 48.2 |
| Thermal Expansion (×10??/K) | 11.8 |
| Elastic Modulus (GPa) | 210 |
| Poisson's Ratio | 0.27 - 0.30 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Hot Rolled Sheets, Cold Rolled Sheets, Plates, Coils |
| Thickness Range | 1.2 - 25mm |
| Width Range | 1000 - 2100mm |
| Length Range | 2000 - 12000mm |
| Standards Compliance | ASTM A1011, SAE J2340, EN 10149-2 |
| Surface Condition | Hot Rolled, Pickled & Oiled, Cold Rolled |
| Edge Condition | Mill Edge, Slit Edge, Trimmed Edge |
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Our Advantages in Processing HSLA 550 Steel
Advanced Thermomechanical Processing
MetalZenith employs cutting-edge TMCP technology with precise temperature control and optimized cooling rates to achieve fine-grain microstructure and enhanced precipitation strengthening. Our controlled rolling process ensures uniform mechanical properties and superior strength-to-weight performance throughout the material thickness.
Comprehensive Performance Testing
MetalZenith conducts extensive testing protocols including formability analysis, weldability assessment, hydrogen-induced cracking resistance evaluation, and delayed fracture testing. Our advanced testing ensures optimal performance in demanding applications requiring high strength and superior processing characteristics.
Custom Processing Solutions
MetalZenith offers tailored processing services including precision cutting, forming, heat treatment optimization, and surface preparation. Our technical team provides comprehensive support for application-specific requirements, ensuring optimal performance in automotive, construction, and heavy equipment applications.
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