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Technical Specifications
Product Overview
Metallurgical Characteristics
Grade 50 is a high-strength low-alloy (HSLA) structural steel with a fine-grained ferritic-pearlitic microstructure enhanced by microalloying elements. The controlled addition of vanadium, niobium, and copper provides precipitation strengthening and grain refinement, resulting in superior strength-to-weight ratios and excellent atmospheric corrosion resistance 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 mechanical properties. Our thermomechanical controlled processing (TMCP) ensures fine grain structure and uniform strength distribution. Normalizing at 900-950°C may be applied for enhanced toughness in thick sections.
Manufacturing Excellence
Our state-of-the-art production facility utilizes advanced electric arc furnace technology with precise chemical composition control and continuous casting processes. Real-time monitoring systems ensure consistent quality, while our rolling mill technology provides superior surface finish and dimensional accuracy critical for structural applications.
Specialized Quality Testing
MetalZenith conducts comprehensive testing protocols including AWS D1.1 weldability testing, ASTM A370 bend testing for formability assessment, fatigue testing per ASTM D7791, and atmospheric corrosion testing following ASTM G101. Our quality assurance includes ultrasonic testing, magnetic particle inspection, and complete chemical analysis with certified mill test certificates.
Structural Engineering Applications
Grade 50 steel is specifically engineered for high-performance structural applications requiring superior strength and reliability. In building construction, it enables lighter framework designs with increased load capacity. For bridge engineering, its excellent fatigue resistance and weldability make it ideal for long-span structures. In machinery manufacturing and vehicle construction, the combination of high strength and formability allows for complex geometries while maintaining structural integrity under dynamic loading conditions.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.23 |
| Manganese (Mn) | 1.35 max |
| Silicon (Si) | 0.40 max |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
| Copper (Cu) | 0.20 - 0.40 |
| Vanadium (V) | 0.01 - 0.15 |
| Niobium (Nb) | 0.005 - 0.05 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 345 |
| Tensile Strength (MPa) | 450 - 620 |
| Elongation (%) | ≥ 21 |
| Impact Energy at 0°C (J) | ≥ 27 |
| Hardness (HB) | 140 - 190 |
| Fatigue Strength (MPa) | 160 - 180 |
🔬 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) | 11.7 |
| 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 | 3 - 200mm |
| Width Range | 1000 - 3500mm |
| Length Range | 6000 - 15000mm |
| Standards Compliance | ASTM A572 Grade 50, AISC, AWS D1.1 |
| Heat Treatment Condition | Hot Rolled, Normalized, or TMCP |
| Surface Finish | Mill Scale, Pickled, Shot Blasted |
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Our Advantages in Processing Grade 50 Steel
Advanced Controlled Rolling Technology
MetalZenith utilizes precision-controlled rolling with optimized temperature profiles and reduction schedules to achieve superior grain structure and mechanical properties. Our advanced processing technology ensures consistent strength characteristics and enhanced formability throughout the material thickness.
Comprehensive Structural Testing
Our Grade 50 steel undergoes extensive testing including Charpy V-notch impact testing, bend testing for formability assessment, fatigue strength evaluation, and atmospheric corrosion resistance testing. We also perform comprehensive weldability testing to ensure optimal performance in fabricated structures.
Custom Fabrication Services
MetalZenith provides complete custom processing services including precision cutting, forming, welding preparation, and heat treatment modifications. Our technical support team works closely with structural engineers to optimize material specifications for specific construction and manufacturing requirements.
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