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Technical Specifications
Product Overview
Metallurgical Characteristics
EN S420 is a low-alloy, high-strength structural steel featuring a fine-grained ferrite-pearlite microstructure achieved through controlled rolling processes. The steel's enhanced strength is derived from solid solution strengthening, grain refinement, and precipitation hardening mechanisms. MetalZenith's advanced thermomechanical controlled processing (TMCP) ensures optimal grain size distribution and mechanical property uniformity.
Heat Treatment & Processing
EN S420 is typically supplied in the hot-rolled condition with optional normalizing treatment for enhanced mechanical properties. MetalZenith employs precise temperature control during rolling (finishing temperature 800-900°C) followed by accelerated cooling to achieve the desired microstructure. Stress relief annealing at 580-650°C may be applied for dimensional stability in critical applications.
Manufacturing Process Excellence
MetalZenith's integrated production process begins with electric arc furnace steelmaking, followed by ladle refining for precise chemistry control. Continuous casting ensures homogeneous structure, while our state-of-the-art rolling mills with computerized process control deliver consistent mechanical properties. Advanced cooling systems enable controlled transformation kinetics for optimal strength-toughness balance.
Quality Standards & Testing
All EN S420 products undergo comprehensive testing including chemical analysis by optical emission spectroscopy, mechanical property verification through tensile and impact testing, and ultrasonic inspection for internal soundness. MetalZenith maintains full traceability from raw materials to finished products, ensuring compliance with EN 10025-2 and customer-specific requirements.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.20 |
| Manganese (Mn) | ≤ 1.70 |
| Silicon (Si) | ≤ 0.55 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
| Nitrogen (N) | ≤ 0.012 |
| Chromium (Cr) | ≤ 0.30 |
| Nickel (Ni) | ≤ 0.50 |
| Molybdenum (Mo) | ≤ 0.10 |
| Copper (Cu) | ≤ 0.55 |
| Aluminum (Al) | ≥ 0.020 |
| Vanadium (V) | ≤ 0.20 |
| Niobium (Nb) | ≤ 0.05 |
| Titanium (Ti) | ≤ 0.05 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (ReH) | 420-560 MPa |
| Tensile Strength (Rm) | 520-680 MPa |
| Elongation (A5) | ≥ 19% |
| Impact Energy (KV) at 20°C | ≥ 27 J |
| Impact Energy (KV) at 0°C | ≥ 40 J |
| Impact Energy (KV) at -20°C | ≥ 27 J |
| Hardness (HB) | 150-220 |
| Young's Modulus | 210 GPa |
| Shear Modulus | 81 GPa |
| Poisson's Ratio | 0.30 |
| Fatigue Limit (10^7 cycles) | 230-280 MPa |
| Reduction of Area | ≥ 50% |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1510°C |
| Thermal Conductivity (20°C) | 54 W/m·K |
| Thermal Expansion Coefficient (20-100°C) | 12×10-6/K |
| Thermal Expansion Coefficient (20-200°C) | 13×10-6/K |
| Thermal Expansion Coefficient (20-400°C) | 14×10-6/K |
| Specific Heat Capacity | 500 J/kg·K |
| Electrical Resistivity (20°C) | 0.16 µΩ·m |
| Magnetic Permeability | Ferromagnetic |
| Curie Temperature | 770°C |
| Thermal Diffusivity (20°C) | 13.8 mm²/s |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Plates, Sheets, Bars, Beams, Channels, Angles, Tubes, Pipes |
| Plate Thickness Range | 3-400 mm |
| Sheet Thickness Range | 0.5-3 mm |
| Bar Diameter Range | 10-300 mm |
| Maximum Plate Dimensions | 3000×12000 mm |
| Standards Compliance | EN 10025-2, ASTM A572, JIS G3106 |
| Surface Finish | Hot Rolled, Normalized, Shot Blasted, Pickled |
| Dimensional Tolerance | ±0.1-0.5 mm (depending on dimensions) |
| Flatness Tolerance | ≤ 5 mm/m |
| Edge Condition | Mill Edge, Sheared, Flame Cut, Machined |
| Heat Treatment Options | As Rolled, Normalized, Stress Relieved |
| Testing Certificates | EN 10204 3.1, 3.2 Mill Test Certificates |
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Our Advantages in Processing EN S420
Advanced Thermomechanical Processing
MetalZenith employs cutting-edge controlled rolling and accelerated cooling technology to optimize grain refinement and achieve superior mechanical properties in EN S420 steel, ensuring consistent strength and toughness across all product dimensions.
Comprehensive Quality Control System
Our integrated quality management system includes real-time chemical composition monitoring, automated mechanical testing, and advanced non-destructive testing capabilities, guaranteeing every batch of EN S420 meets or exceeds international standards.
Flexible Customization & Global Supply
MetalZenith offers extensive customization options for EN S420 steel including specific dimensions, surface treatments, and mechanical property requirements, supported by our global logistics network for reliable worldwide delivery.
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