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Technical Specifications
Product Overview
Metallurgical Characteristics
L80 structural steel features a refined ferritic-pearlitic microstructure achieved through controlled thermomechanical processing. The optimized alloy composition with chromium, nickel, and molybdenum additions provides enhanced hardenability and improved mechanical properties. The fine grain structure ensures excellent strength-toughness balance essential for structural applications.
Heat Treatment Process
MetalZenith employs controlled rolling at 1050-1150°C followed by normalization at 900-950°C with controlled cooling rates to achieve optimal microstructural development. Alternative quenching and tempering processes at 850-900°C quenching and 600-650°C tempering are available for enhanced strength requirements.
Manufacturing Process Excellence
Our advanced manufacturing process includes electric arc furnace melting with secondary refining, continuous casting, and precision hot rolling with real-time temperature control. MetalZenith's integrated quality management ensures consistent chemical composition and mechanical properties throughout production batches.
Structural Performance Testing
L80 steel undergoes comprehensive testing including welding performance evaluation per AWS standards, forming capability assessment for fabrication requirements, fatigue strength testing for cyclic loading applications, and atmospheric corrosion resistance testing for long-term durability in structural environments.
Application Engineering Considerations
For building construction, L80 provides excellent strength-to-weight ratio and seismic resistance. In bridge engineering, superior fatigue resistance ensures long service life under dynamic loading. For machinery manufacturing, high strength enables compact designs, while automotive applications benefit from crashworthiness and formability. General engineering applications leverage the balanced mechanical properties and excellent weldability for versatile structural solutions.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.26 - 0.35 |
| Manganese (Mn) | 1.25 - 1.65 |
| Silicon (Si) | 0.20 - 0.50 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 0.40 - 0.70 |
| Nickel (Ni) | 0.25 - 0.45 |
| Molybdenum (Mo) | 0.15 - 0.25 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 552 |
| Tensile Strength (MPa) | 655 - 758 |
| Elongation (%) | ≥ 18 |
| Impact Energy at 0°C (J) | ≥ 40 |
| Hardness (HB) | 200 - 235 |
| Fatigue Strength (MPa) | 280 - 320 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.85 |
| Melting Point (°C) | 1480 - 1520 |
| Thermal Conductivity (W/m·K) | 44.5 |
| Thermal Expansion (×10??/K) | 12.3 |
| Elastic Modulus (GPa) | 205 |
| Poisson's Ratio | 0.27 - 0.30 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Plates, Beams, Channels, Angles, Bars, Tubes |
| Thickness Range | 8 - 150mm |
| Width Range | 1200 - 3500mm |
| Length Range | 6000 - 15000mm |
| Standards Compliance | ASTM A572, AISC, AWS D1.1, EN 10025 |
| Heat Treatment Condition | Normalized or Quenched & Tempered |
| Surface Finish | Hot Rolled, Shot Blasted, Pickled |
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Our Advantages in Processing L80 Steel
Advanced Thermomechanical Processing
MetalZenith utilizes controlled rolling with precise temperature monitoring and optimized cooling rates to achieve superior grain refinement in L80 steel. Our advanced processing technology ensures consistent mechanical properties throughout the material cross-section, delivering enhanced strength and toughness for structural applications.
Comprehensive Structural Testing
Our L80 steel undergoes extensive testing protocols including welding performance evaluation, forming capability assessment, fatigue strength testing, and atmospheric corrosion resistance analysis. MetalZenith's quality assurance ensures optimal performance in structural applications with complete documentation and certification.
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 structural engineers to deliver L80 steel solutions tailored to specific project requirements and building codes.
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