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Technical Specifications
Product Overview
Metallurgical Characteristics
EN 51CrV4 is a low-alloy spring steel with chromium and vanadium additions that provide enhanced hardenability, fine grain structure, and superior fatigue resistance. The vanadium content promotes carbide formation, contributing to increased strength and wear resistance while maintaining excellent spring properties.
Heat Treatment Process
MetalZenith employs controlled atmosphere furnaces for optimal heat treatment. Austenitizing at 850-880°C followed by oil quenching and tempering at 420-480°C achieves the desired balance of strength, toughness, and spring characteristics. Precise temperature control ensures uniform properties throughout the cross-section.
Manufacturing Process
Our production begins with electric arc furnace melting using premium raw materials, followed by ladle refining and continuous casting. Hot rolling is performed using computer-controlled mills to achieve precise dimensions and surface quality. Cold drawing operations provide enhanced surface finish and dimensional accuracy for critical applications.
Quality Standards & Testing
All EN 51CrV4 products undergo comprehensive testing including chemical analysis per EN 10204, mechanical property verification, ultrasonic testing for internal soundness, and dimensional inspection. Fatigue testing validates spring performance characteristics. MetalZenith maintains full traceability from raw materials to finished products, ensuring compliance with international standards and customer specifications.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.47 - 0.55 |
| Silicon (Si) | 0.15 - 0.40 |
| Manganese (Mn) | 0.70 - 1.10 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.025 |
| Chromium (Cr) | 0.90 - 1.20 |
| Vanadium (V) | 0.10 - 0.25 |
| Nickel (Ni) | ≤ 0.40 |
| Copper (Cu) | ≤ 0.30 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (Rm) | 1200 - 1400 MPa |
| Yield Strength (Rp0.2) | ≥ 1080 MPa |
| Elongation (A5) | ≥ 8% |
| Reduction of Area (Z) | ≥ 35% |
| Hardness (HRC) | 38 - 44 |
| Impact Energy (KV) | ≥ 25 J |
| Fatigue Limit | 550 - 650 MPa |
| Young's Modulus | 210 GPa |
| Poisson's Ratio | 0.27 - 0.30 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1420 - 1460°C |
| Thermal Conductivity (20°C) | 42 W/m·K |
| Thermal Expansion Coefficient (20-100°C) | 12.5×10-6/K |
| Specific Heat Capacity | 460 J/kg·K |
| Electrical Resistivity (20°C) | 0.25 µΩ·m |
| Magnetic Permeability | Ferromagnetic |
| Curie Temperature | 770°C |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Round bars, flat bars, wire, strips, plates |
| Round Bar Diameter | 6 - 300 mm |
| Flat Bar Dimensions | 10-200 mm × 3-80 mm |
| Wire Diameter | 0.5 - 20 mm |
| Length | Up to 12 meters or cut to length |
| Standards | EN 10089, DIN 17221, ASTM A689 |
| Surface Finish | Black, peeled, ground, polished |
| Tolerance | h9, h10, h11 or custom |
| Heat Treatment Condition | Annealed, quenched & tempered |
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Our Advantages in Processing EN 51CrV4
Advanced Heat Treatment Technology
MetalZenith utilizes precision-controlled quenching and tempering processes with automated temperature monitoring systems, ensuring consistent microstructure and optimal spring properties throughout the entire cross-section of EN 51CrV4 products.
Comprehensive Quality Testing
Our state-of-the-art testing laboratory performs complete chemical analysis, mechanical property verification, fatigue testing, and microstructural examination using advanced equipment including optical emission spectrometers and universal testing machines.
Custom Processing & Global Supply
MetalZenith offers extensive customization capabilities including precision cutting, surface treatments, and special packaging. Our global distribution network ensures reliable delivery worldwide with comprehensive technical support and engineering consultation services.
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