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Technical Specifications
Product Overview
Metallurgical Characteristics
S420 is a high-strength low-alloy (HSLA) structural steel with a fine-grained ferritic-pearlitic microstructure achieved through thermomechanical controlled processing. The controlled addition of microalloying elements promotes grain refinement and precipitation strengthening, resulting in an optimal combination of strength, toughness, and weldability essential for structural applications.
Heat Treatment Process
MetalZenith employs advanced TMCP technology with controlled rolling temperatures between 850-950°C followed by accelerated cooling. This process ensures optimal austenite conditioning and controlled transformation, resulting in fine grain structure and enhanced mechanical properties without compromising weldability.
Manufacturing Excellence
Our state-of-the-art production facility utilizes computer-controlled rolling mills with precise temperature monitoring and cooling systems. The manufacturing process includes continuous casting, reheating furnaces with walking beam technology, and multi-pass rolling with controlled deformation schedules to achieve consistent quality and dimensional accuracy.
Specialized Quality Testing
MetalZenith conducts comprehensive testing specific to structural applications including welding performance evaluation using standard procedures, cold forming tests to assess bendability, rotating beam fatigue testing for cyclic loading applications, and salt spray testing for atmospheric corrosion resistance verification.
Application Engineering
For building structures, S420 provides excellent strength-to-weight ratios enabling lighter framework designs. In bridge engineering, its superior fatigue resistance ensures long-term durability under dynamic loading. For machinery manufacturing, the combination of high strength and good machinability facilitates complex component fabrication. In vehicle construction, the excellent formability allows for efficient manufacturing of chassis components while maintaining structural integrity.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.20 |
| Manganese (Mn) | 1.00 - 1.70 |
| Silicon (Si) | ≤ 0.55 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | ≤ 0.30 |
| Nickel (Ni) | ≤ 0.50 |
| Molybdenum (Mo) | ≤ 0.10 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 420 |
| Tensile Strength (MPa) | 520 - 680 |
| Elongation (%) | ≥ 19 |
| Impact Energy at -20°C (J) | ≥ 27 |
| Hardness (HB) | 140 - 210 |
| Fatigue Strength (MPa) | 210 - 250 |
🔬 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) | 12.0 |
| Elastic Modulus (GPa) | 210 |
| Poisson's Ratio | 0.30 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Plates, Sheets, Beams, Channels, Angles, Bars |
| Thickness Range | 3 - 80mm |
| Width Range | 1000 - 3200mm |
| Length Range | 6000 - 15000mm |
| Standards Compliance | EN 10025-4, ASTM A572 Grade 60, JIS G3106 |
| Heat Treatment Condition | TMCP (As Rolled) or Normalized |
| Surface Finish | Hot Rolled, Shot Blasted, Pickled |
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Our Advantages in Processing S420 Steel
Advanced Thermomechanical Processing
MetalZenith utilizes cutting-edge TMCP technology with precise temperature control and controlled cooling rates to achieve optimal microstructure refinement. Our advanced processing ensures consistent mechanical properties, enhanced toughness, and superior weldability throughout the material cross-section.
Comprehensive Structural Testing
Our rigorous quality assurance includes specialized testing for structural applications: welding performance evaluation, cold forming capability assessment, fatigue strength testing, and atmospheric corrosion resistance analysis. Each batch undergoes complete mechanical property verification to ensure structural integrity.
Custom Fabrication Solutions
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 tailored solutions for complex construction and engineering projects.
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