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Technical Specifications
Product Overview
Metallurgical Characteristics
EN 18NiCrMo14-6 is a low-carbon, high-alloy case hardening steel with excellent hardenability due to its nickel, chromium, and molybdenum content. The steel exhibits a fine-grained ferritic-pearlitic microstructure in the annealed condition, transforming to martensite in the case and tempered martensite in the core after proper heat treatment. The controlled carbon content ensures optimal case-to-core hardness gradient while maintaining core toughness.
Heat Treatment Process
Case hardening involves carburizing at 900-950°C for 4-12 hours depending on required case depth, followed by direct quenching or reheat quenching from 820-850°C in oil or polymer. Tempering is performed at 150-200°C to achieve optimal surface hardness of 58-62 HRC. Core properties are developed through quenching from 850°C and tempering at 550-650°C to achieve 30-40 HRC core hardness with excellent toughness.
Manufacturing Process
MetalZenith produces EN 18NiCrMo14-6 through electric arc furnace melting followed by ladle refining and vacuum degassing to achieve superior cleanliness. The steel is cast into ingots or continuously cast billets, then hot forged or rolled to final dimensions. Controlled cooling and intermediate annealing ensure optimal microstructure and machinability. Advanced quality control includes spectroscopic analysis, mechanical testing, and ultrasonic inspection.
Quality Standards and Compliance
All EN 18NiCrMo14-6 products comply with EN 10084, DIN 17210, and equivalent international standards. MetalZenith maintains comprehensive quality management systems certified to ISO 9001:2015, AS9100D, and IATF 16949. Each batch undergoes rigorous testing including chemical composition verification, mechanical property testing, microstructural examination, and dimensional inspection with full traceability documentation provided.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.15 - 0.21 |
| Silicon (Si) | ≤ 0.40 |
| Manganese (Mn) | 0.50 - 0.90 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.035 |
| Chromium (Cr) | 1.40 - 1.80 |
| Nickel (Ni) | 3.00 - 3.50 |
| Molybdenum (Mo) | 0.30 - 0.50 |
| Aluminum (Al) | 0.020 - 0.050 |
| Copper (Cu) | ≤ 0.30 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (Rm) | 1000 - 1200 MPa |
| Yield Strength (Rp0.2) | ≥ 800 MPa |
| Elongation (A5) | ≥ 12% |
| Reduction of Area (Z) | ≥ 55% |
| Hardness (Annealed) | ≤ 241 HB |
| Surface Hardness (Case Hardened) | 58 - 62 HRC |
| Core Hardness | 30 - 40 HRC |
| Impact Energy (KV) | ≥ 40 J |
| Fatigue Limit | 450 - 550 MPa |
| Young's Modulus | 210 GPa |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 7.85 g/cm³ |
| Melting Point | 1480 - 1520°C |
| Thermal Conductivity (20°C) | 42 W/m·K |
| Thermal Expansion Coefficient (20-100°C) | 11.5×10-6/K |
| Specific Heat Capacity | 460 J/kg·K |
| Electrical Resistivity (20°C) | 0.25 µΩ·m |
| Magnetic Permeability | Ferromagnetic |
| Curie Temperature | 750°C |
| Poisson's Ratio | 0.27 - 0.30 |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Round bars, square bars, flat bars, plates, forgings, rings |
| Round Bar Diameter | 10 - 500 mm |
| Plate Thickness | 8 - 200 mm |
| Length | Up to 12 meters (custom lengths available) |
| Standards | EN 10084, DIN 17210, ASTM A534, JIS SCM |
| Surface Finish | Hot rolled, cold drawn, peeled, ground, machined |
| Dimensional Tolerance | h9, h10, h11 (ISO 286) |
| Heat Treatment Condition | Annealed, normalized, quenched and tempered |
| Testing | Chemical analysis, mechanical testing, ultrasonic testing |
| Certification | Mill test certificate, EN 10204 3.1/3.2 |
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Our Advantages in Processing EN 18NiCrMo14-6
Advanced Vacuum Degassing Technology
MetalZenith employs state-of-the-art vacuum degassing and ladle refining processes to achieve ultra-low inclusion content and superior cleanliness levels in EN 18NiCrMo14-6, resulting in enhanced fatigue life and improved mechanical properties for critical applications.
Precision Heat Treatment Control
Our computer-controlled heat treatment facilities with precise atmosphere control ensure optimal case depth and core hardness consistency. Advanced quenching and tempering processes guarantee uniform microstructure and predictable mechanical properties throughout the entire product range.
Comprehensive Customization Capabilities
MetalZenith offers extensive customization options including specific chemical compositions, custom heat treatment cycles, precision machining, and specialized surface treatments. Our engineering team provides technical support for application-specific requirements and rapid prototyping services.
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