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Technical Specifications
Product Overview
Metallurgical Characteristics
EN 25CrMo4 is a low-alloy steel with chromium and molybdenum additions that significantly enhance hardenability, strength, and toughness. The chromium content provides improved corrosion resistance and wear properties, while molybdenum contributes to high-temperature strength and prevents temper brittleness. The steel exhibits excellent through-hardening characteristics and maintains good ductility even at high strength levels.
Heat Treatment Process
MetalZenith's heat treatment process begins with austenitizing at 850-880°C, followed by oil quenching to achieve martensitic structure. Tempering is performed at 550-650°C depending on desired hardness levels. Our computer-controlled furnaces ensure uniform heating and precise temperature control throughout the process. Post-heat treatment stress relieving at 600-650°C may be applied for dimensional stability in critical applications.
Manufacturing Excellence
MetalZenith employs electric arc furnace melting followed by ladle refining and vacuum degassing to achieve superior cleanliness. Continuous casting and controlled rolling processes ensure uniform microstructure and mechanical properties. Our quality control includes spectroscopic analysis, ultrasonic testing, magnetic particle inspection, and comprehensive mechanical testing according to international standards.
Quality Standards & Certifications
All EN 25CrMo4 products are manufactured in compliance with EN 10083-3 standards and equivalent specifications including AISI 4130, JIS SCM430, and GB 25CrMo4. MetalZenith maintains ISO 9001:2015, ISO 14001:2015, and OHSAS 18001 certifications. Each shipment includes comprehensive mill test certificates with chemical analysis, mechanical properties, and traceability documentation.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.22 - 0.29 |
| Silicon (Si) | 0.15 - 0.40 |
| Manganese (Mn) | 0.60 - 0.90 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.025 |
| Chromium (Cr) | 0.90 - 1.20 |
| Molybdenum (Mo) | 0.15 - 0.30 |
| Nickel (Ni) | ≤ 0.30 |
| Copper (Cu) | ≤ 0.30 |
| Aluminum (Al) | ≥ 0.020 |
⚙️ Mechanical Properties
| Property | Value | Condition |
|---|---|---|
| Tensile Strength | 900 - 1100 MPa | Quenched & Tempered |
| Yield Strength (0.2% offset) | ≥ 700 MPa | Quenched & Tempered |
| Elongation (A5) | ≥ 14% | Quenched & Tempered |
| Reduction of Area | ≥ 50% | Quenched & Tempered |
| Hardness (HB) | 269 - 331 | Quenched & Tempered |
| Impact Energy (KV) | ≥ 40 J | At 20°C |
| Fatigue Limit | 450 - 500 MPa | 107 cycles |
| Young's Modulus | 210 GPa | Room Temperature |
🔬 Physical Properties
| Property | Value | Temperature |
|---|---|---|
| Density | 7.85 g/cm³ | 20°C |
| Melting Point | 1480 - 1520°C | - |
| Thermal Conductivity | 42 W/m·K | 20°C |
| Thermal Expansion Coefficient | 12.1×10-6/K | 20-100°C |
| Specific Heat Capacity | 460 J/kg·K | 20°C |
| Electrical Resistivity | 0.22 µΩ·m | 20°C |
| Magnetic Permeability | Ferromagnetic | Room Temperature |
| Curie Temperature | 770°C | - |
📏 Product Specifications
| Specification | Available Options | Standards |
|---|---|---|
| Product Forms | Round bars, flat bars, plates, sheets, tubes, forgings | EN 10083-3 |
| Round Bar Diameter | 10 - 300 mm | EN 10060 |
| Flat Bar Dimensions | 10-100 mm thick × 20-300 mm wide | EN 10058 |
| Plate Thickness | 8 - 150 mm | EN 10083-3 |
| Surface Finish | Hot rolled, cold drawn, peeled, ground, machined | EN 10221 |
| Dimensional Tolerance | h9 to h11 (cold drawn), ±0.5mm (hot rolled) | ISO 286 |
| Length | 3000 - 12000 mm (standard), custom lengths available | Customer specification |
| Heat Treatment Condition | Annealed, normalized, quenched & tempered | EN 10083-3 |
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Our Advantages in Processing EN 25CrMo4
Advanced Vacuum Melting Technology
MetalZenith employs state-of-the-art vacuum induction melting and electroslag remelting processes to produce EN 25CrMo4 with exceptional purity and homogeneity. Our controlled atmosphere production eliminates inclusions and ensures superior mechanical properties and fatigue resistance.
Comprehensive Heat Treatment Expertise
Our precision-controlled heat treatment facilities feature computer-monitored quenching and tempering processes with ±5°C temperature accuracy. This ensures consistent microstructure optimization and mechanical property achievement across all EN 25CrMo4 products.
Custom Processing & Global Supply
MetalZenith offers extensive customization capabilities including precision machining, surface treatments, and non-standard dimensions. Our global distribution network ensures reliable delivery worldwide with comprehensive technical support and material certification documentation.
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