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Technical Specifications
Product Overview
Metallurgical Characteristics
N80 is a quenched and tempered alloy structural steel with a predominantly tempered martensitic microstructure. The controlled addition of chromium, nickel, and molybdenum provides enhanced hardenability and improved mechanical properties. The fine-grained structure achieved through controlled processing ensures excellent strength-toughness balance essential for structural applications.
Heat Treatment Process
MetalZenith employs controlled austenitizing at 870-900°C followed by water quenching and tempering at 580-650°C. This precise heat treatment cycle ensures optimal mechanical properties and dimensional stability. Our advanced furnace control systems maintain uniform temperature distribution for consistent material properties throughout the cross-section.
Manufacturing Process
Our N80 steel production utilizes electric arc furnace melting with secondary refining processes including ladle furnace treatment and vacuum degassing. The controlled rolling process followed by accelerated cooling ensures fine grain structure and optimal mechanical properties. Advanced quality control systems monitor composition and properties throughout production.
Structural Quality Testing
MetalZenith conducts comprehensive testing specific to structural applications including weldability testing per AWS standards, forming performance evaluation, fatigue strength testing under cyclic loading, and atmospheric corrosion resistance assessment. Ultrasonic testing ensures internal soundness critical for structural integrity.
Application Engineering
For building construction, N80 provides excellent strength-to-weight ratio enabling efficient structural designs. In bridge engineering, superior fatigue resistance ensures long service life under dynamic loading. For machinery manufacturing, excellent machinability and weldability facilitate complex fabrication. In vehicle manufacturing, high strength enables weight reduction while maintaining safety standards. General engineering applications benefit from consistent mechanical properties and reliable performance.
🧪 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) | 0.40 - 0.70 |
| Molybdenum (Mo) | 0.15 - 0.25 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 552 |
| Tensile Strength (MPa) | 689 - 827 |
| Elongation (%) | ≥ 18 |
| Impact Energy at 0°C (J) | ≥ 40 |
| Hardness (HRC) | 22 - 28 |
| Fatigue Strength (MPa) | 310 - 350 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.85 |
| Melting Point (°C) | 1480 - 1520 |
| Thermal Conductivity (W/m·K) | 42.7 |
| Thermal Expansion (×10??/K) | 12.3 |
| Elastic Modulus (GPa) | 207 |
| 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 A514, ASTM A517, EN 10025 |
| Heat Treatment Condition | Quenched and Tempered |
| Surface Finish | Hot Rolled, Pickled, Shot Blasted |
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Our Advantages in Processing N80 Steel
Advanced Structural Processing Technology
MetalZenith utilizes controlled rolling and precise normalization processes with advanced temperature control to achieve optimal grain structure and enhanced mechanical properties. Our specialized processing ensures consistent strength and toughness throughout the material cross-section, critical for structural integrity.
Comprehensive Structural Testing
Our N80 steel undergoes extensive testing including weldability assessment, forming performance evaluation, fatigue strength testing, and atmospheric corrosion resistance analysis. This comprehensive testing ensures reliable performance in demanding structural applications and long-term durability.
Custom Structural Solutions
MetalZenith provides tailored structural steel solutions with custom dimensions, heat treatment specifications, and mechanical property optimization. Our technical team offers comprehensive support for structural design requirements and application-specific processing.
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