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Technical Specifications
Product Overview
Metallurgical Characteristics
Grade 80 is a quenched and tempered high-strength low-alloy steel with a predominantly tempered martensitic microstructure. The controlled addition of chromium, molybdenum, and boron provides enhanced hardenability and strength while maintaining excellent toughness. The fine-grained microstructure achieved through controlled processing ensures superior mechanical properties and consistent performance across varying section thicknesses.
Heat Treatment Process
MetalZenith employs precise quenching from 900-950°C followed by tempering at 580-650°C with controlled cooling rates to achieve optimal strength-toughness balance. Our advanced heat treatment facilities ensure uniform heating and cooling throughout the material cross-section, eliminating residual stresses and achieving consistent mechanical properties.
Manufacturing Process Excellence
Our Grade 80 production utilizes electric arc furnace melting with secondary refining, continuous casting, and controlled rolling processes. MetalZenith's advanced quality control systems monitor chemical composition, temperature profiles, and mechanical properties throughout production to ensure consistent quality and performance.
Specialized Quality Testing
Grade 80 undergoes comprehensive testing including welding procedure qualification tests, bend testing for formability assessment, rotating beam fatigue testing, and accelerated atmospheric corrosion testing. Our testing protocols ensure superior performance in structural applications with full documentation and certification compliance.
Structural Engineering Applications
Grade 80's exceptional strength-to-weight ratio makes it ideal for building construction where reduced structural weight is critical, bridge engineering requiring high load capacity, machinery manufacturing demanding durability, vehicle construction needing crash resistance, and general engineering applications requiring reliable performance under dynamic loading conditions.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.15 - 0.21 |
| Manganese (Mn) | 0.80 - 1.50 |
| Silicon (Si) | 0.15 - 0.50 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.035 |
| Chromium (Cr) | 0.40 - 0.65 |
| Molybdenum (Mo) | 0.15 - 0.25 |
| Boron (B) | 0.0005 - 0.006 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 550 |
| Tensile Strength (MPa) | 620 - 760 |
| Elongation (%) | ≥ 18 |
| Impact Energy at -40°C (J) | ≥ 34 |
| Hardness (HB) | 180 - 230 |
| Fatigue Strength (MPa) | 275 - 310 |
🔬 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) | 200 |
| Poisson's Ratio | 0.27 - 0.30 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Plates, Beams, Channels, Angles, Bars, Forgings |
| Thickness Range | 8 - 150mm |
| Width Range | 1200 - 3500mm |
| Length Range | 6000 - 15000mm |
| Standards Compliance | ASTM A514, ASTM A709 Grade 80, AWS D1.1 |
| Heat Treatment Condition | Quenched and Tempered |
| Surface Finish | Hot Rolled, Shot Blasted, Pickled |
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Our Advantages in Processing Grade 80 Steel
Advanced Thermomechanical Processing
MetalZenith utilizes controlled rolling followed by precise quenching and tempering processes with real-time temperature monitoring to achieve optimal microstructure and superior mechanical properties. Our advanced processing ensures consistent strength and toughness throughout the material cross-section for reliable structural performance.
Comprehensive Structural Testing
Our Grade 80 steel undergoes extensive testing including welding performance evaluation, forming capability assessment, fatigue strength testing, and atmospheric corrosion resistance analysis. MetalZenith's quality assurance program ensures exceptional performance in demanding structural applications with full compliance to industry standards.
Custom Engineering Solutions
MetalZenith provides comprehensive custom processing services including precision cutting, forming, heat treatment, and surface preparation. Our technical support team works closely with structural engineers to optimize material specifications and processing parameters for specific construction and manufacturing requirements.
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