20 Years Experience | 1000+ Brand Partners | Full Customization
We have 20 years of industry experience, have partnered with over 1,000 brands, and support any customization needs.
Technical Specifications
Product Overview
Metallurgical Characteristics
EN 42CrMo4 is a low-alloy steel with excellent hardenability due to its chromium and molybdenum content. The chromium enhances hardenability and provides moderate corrosion resistance, while molybdenum improves high-temperature strength and reduces temper brittleness. The steel exhibits a fine-grained martensitic structure after quenching, which transforms to tempered martensite after tempering, providing an optimal combination of strength and toughness.
Heat Treatment Process
MetalZenith's heat treatment process begins with normalization at 850-900°C followed by air cooling. Hardening is performed at 820-860°C with oil or water quenching depending on section size. Tempering is conducted at 550-680°C to achieve the desired mechanical properties. Our computer-controlled furnaces ensure uniform heating and precise temperature control throughout the process.
Manufacturing Process
Our manufacturing process utilizes electric arc furnace melting followed by ladle refining and vacuum degassing to achieve superior steel cleanliness. Continuous casting produces high-quality billets with minimal segregation. Hot rolling is performed with controlled rolling parameters to achieve fine grain structure and optimal mechanical properties. Cold finishing operations include peeling, grinding, and precision machining to meet exact dimensional requirements.
Quality Standards & Testing
All EN 42CrMo4 products comply with EN 10083-3 standards and equivalent international specifications including ASTM A29, JIS G4053, and GB/T 3077. Comprehensive testing includes chemical analysis by optical emission spectroscopy, mechanical testing per EN ISO 6892-1, Charpy impact testing per EN ISO 148-1, and ultrasonic inspection per EN 10228-3. Microstructural examination and hardness testing ensure consistent quality throughout production batches.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.38 - 0.45 |
| Silicon (Si) | 0.15 - 0.40 |
| Manganese (Mn) | 0.60 - 0.90 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.035 |
| 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 (Rm) | 1000 - 1200 MPa | Quenched & Tempered |
| Yield Strength (Rp0.2) | ≥ 800 MPa | Quenched & Tempered |
| Elongation (A5) | ≥ 12% | Quenched & Tempered |
| Reduction of Area (Z) | ≥ 45% | Quenched & Tempered |
| Hardness (HB) | 302 - 363 HB | Quenched & Tempered |
| Impact Energy (KV) | ≥ 35 J | At 20°C |
| Fatigue Limit | 450 - 550 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 | 42.6 W/m·K | 20°C |
| Thermal Expansion Coefficient | 12.2×10-6/K | 20-100°C |
| Specific Heat Capacity | 460 J/kg·K | 20°C |
| Electrical Resistivity | 0.25 µΩ·m | 20°C |
| Magnetic Permeability | Ferromagnetic | Room Temperature |
| Poisson's Ratio | 0.27 - 0.30 | Room Temperature |
📏 Product Specifications
| Specification | Available Options | Standards |
|---|---|---|
| Product Forms | Round bars, flat bars, plates, sheets, tubes, forgings | EN 10083-3 |
| Round Bar Diameter | 10 - 500 mm | EN 10060 |
| Flat Bar Dimensions | 10-200 mm thickness, up to 1000 mm width | EN 10058 |
| Plate Thickness | 8 - 300 mm | EN 10083-3 |
| Surface Finish | Hot rolled, cold drawn, peeled, ground, machined | Various |
| Length | Up to 12 meters (standard), custom lengths available | Customer specification |
| Tolerance | h9, h10, h11 for diameter; ±0.5mm for thickness | EN 10277 |
| Heat Treatment | Annealed, normalized, quenched & tempered | EN 10083-3 |
Let Us Create Success for Your Project
Professional Team, Premium Products, Complete Service - Your Project Success is Our Mission
Our Advantages in Processing EN 42CrMo4
Advanced Vacuum Degassing Technology
MetalZenith employs state-of-the-art vacuum degassing and ladle refining processes to achieve ultra-low sulfur and phosphorus content in EN 42CrMo4, resulting in superior cleanliness, improved fatigue resistance, and enhanced mechanical properties throughout the material cross-section.
Comprehensive Heat Treatment Capabilities
Our advanced heat treatment facilities feature computer-controlled furnaces with precise temperature uniformity (±5°C) and automated quenching systems. This ensures consistent hardness distribution, optimal microstructure, and repeatable mechanical properties for every batch of EN 42CrMo4 produced.
Global Supply Chain & Custom Solutions
MetalZenith offers flexible customization options including non-standard dimensions, special heat treatment conditions, and application-specific chemical compositions. Our global logistics network ensures timely delivery worldwide, supported by comprehensive technical documentation and material traceability certificates.
YOUR TRUSTED STEEL
MANUFACTURING PARTNER
Quick Inquiry
Industries We Serve
Professional steel solutions across major industries
Qualifications & Certifications
