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Technical Specifications
Product Overview
Metallurgical Characteristics
EN31 steel exhibits a martensitic microstructure after hardening, with uniformly distributed chromium carbides that provide exceptional wear resistance and dimensional stability. The high carbon content enables deep hardening capability, while chromium addition enhances hardenability and corrosion resistance. MetalZenith's controlled carbide morphology ensures optimal balance between hardness and toughness for structural applications.
Heat Treatment Process
MetalZenith employs precise heat treatment cycles including spheroidizing annealing at 750-780°C for improved machinability, followed by hardening at 820-860°C with controlled quenching in oil or salt baths. Tempering at 150-200°C achieves optimal hardness retention while relieving internal stresses. Our computer-controlled furnaces ensure uniform heating and precise temperature control throughout the process.
Manufacturing Excellence
Our advanced manufacturing process incorporates vacuum degassing to minimize hydrogen content and inclusion formation. Controlled forging and rolling operations optimize grain flow and eliminate internal defects. MetalZenith's quality systems include 100% ultrasonic testing and magnetic particle inspection to ensure structural integrity for critical applications.
Specialized Quality Testing
EN31 steel undergoes comprehensive testing including rotating beam fatigue testing to evaluate endurance limits, dimensional stability analysis under thermal cycling, and specialized bearing life testing. Our laboratories conduct thorough hardenability studies, residual stress measurements, and microstructural analysis to ensure consistent performance in demanding structural environments.
Engineering Applications
For mechanical manufacturing applications, EN31 provides exceptional wear resistance in high-load bearing systems and precision machinery components. In vehicle manufacturing, its superior fatigue strength makes it ideal for drivetrain components and suspension elements. The steel's dimensional stability and hardness retention ensure reliable performance in general engineering applications requiring long service life and minimal maintenance.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.95 - 1.10 |
| Chromium (Cr) | 1.30 - 1.60 |
| Manganese (Mn) | 0.25 - 0.45 |
| Silicon (Si) | 0.15 - 0.35 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.025 |
| Nickel (Ni) | ≤ 0.30 |
| Copper (Cu) | ≤ 0.25 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 1900 |
| Tensile Strength (MPa) | 2100 - 2400 |
| Elongation (%) | ≥ 8 |
| Impact Energy at 20°C (J) | ≥ 15 |
| Hardness (HRC) | 60 - 67 |
| Fatigue Strength (MPa) | ≥ 900 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.81 |
| Melting Point (°C) | 1420 - 1460 |
| Thermal Conductivity (W/m·K) | 42.7 |
| Thermal Expansion (×10??/K) | 12.3 |
| Elastic Modulus (GPa) | 210 |
| Poisson's Ratio | 0.27 - 0.30 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Bars, Rods, Tubes, Forgings, Precision Ground Stock |
| Diameter Range | 10 - 300mm |
| Length Range | 1000 - 6000mm |
| Surface Finish | Hot Rolled, Cold Drawn, Ground, Polished |
| Standards Compliance | ASTM A295, ISO 683-17, EN 10084, JIS G4805 |
| Heat Treatment Condition | Annealed, Hardened & Tempered, Spheroidized |
| Tolerance Class | h9, h11 (Cold Drawn), ±0.5mm (Hot Rolled) |
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Our Advantages in Processing EN31 Steel (52100)
Advanced Vacuum Melting Technology
MetalZenith utilizes vacuum induction melting and electroslag remelting processes to achieve ultra-clean steel with minimal inclusions. Our controlled atmosphere processing ensures optimal carbide distribution and enhanced fatigue life, critical for high-performance structural applications requiring exceptional reliability.
Comprehensive Performance Testing
Our EN31 steel undergoes extensive testing including Charpy impact testing, rotating beam fatigue analysis, and specialized bearing life evaluation. We conduct thorough assessments of hardenability, dimensional stability, and residual stress patterns to ensure optimal performance in demanding structural environments.
Precision Heat Treatment Services
MetalZenith offers customized heat treatment solutions including through-hardening, case hardening, and precision tempering with computer-controlled furnaces. Our metallurgical expertise ensures optimal microstructure development and mechanical property optimization for specific structural applications.
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