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Technical Specifications
Product Overview
Metallurgical Characteristics
EN 1.2379 is a ledeburitic cold work tool steel characterized by its high carbon content (1.45-1.60%) and significant chromium content (11-13%). The steel's microstructure consists of a martensitic matrix with uniformly distributed chromium carbides, providing exceptional wear resistance and dimensional stability. The addition of molybdenum and vanadium enhances hardenability and grain refinement, contributing to improved toughness and cutting performance.
Heat Treatment Process
MetalZenith's optimized heat treatment process begins with stress relieving at 650-680°C, followed by hardening at 1000-1030°C in protective atmosphere or vacuum. Quenching is performed in oil or air depending on section size. Tempering is conducted at 150-520°C to achieve desired hardness levels between 58-62 HRC. Multiple tempering cycles ensure dimensional stability and stress relief.
Manufacturing Process Excellence
Our production process utilizes electric arc furnace melting followed by ladle refining and vacuum degassing to achieve optimal cleanliness. Continuous casting or ingot casting is followed by hot forging or rolling to break down the cast structure. Subsequent annealing at 840-860°C ensures optimal machinability and stress relief. Final processing includes precision machining, surface treatment, and comprehensive quality inspection.
Quality Standards & Testing
MetalZenith adheres to stringent quality standards including ISO 9001:2015, EN 10204 3.1 certification, and customer-specific requirements. Our testing protocols encompass chemical analysis via optical emission spectroscopy, mechanical property verification through tensile and hardness testing, ultrasonic inspection for internal soundness, and dimensional verification using coordinate measuring machines. Microstructural analysis ensures proper carbide distribution and grain size control.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 1.45 - 1.60 |
| Silicon (Si) | 0.10 - 0.40 |
| Manganese (Mn) | 0.20 - 0.60 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 11.00 - 13.00 |
| Molybdenum (Mo) | 0.70 - 1.20 |
| Vanadium (V) | 0.70 - 1.20 |
| Nickel (Ni) | ≤ 0.30 |
| Copper (Cu) | ≤ 0.25 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (Annealed) | 750 - 850 MPa |
| Yield Strength (Annealed) | 450 - 550 MPa |
| Elongation (Annealed) | 12 - 18% |
| Hardness (Annealed) | 210 - 255 HB |
| Hardness (Hardened & Tempered) | 58 - 62 HRC |
| Impact Energy (Charpy V-notch) | 15 - 25 J |
| Fatigue Limit | 400 - 500 MPa |
| Modulus of Elasticity | 210 GPa |
| Poisson's Ratio | 0.27 - 0.30 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 7.70 g/cm³ |
| Melting Point | 1420 - 1460°C |
| Thermal Conductivity (20°C) | 20 W/m·K |
| Thermal Expansion Coefficient (20-100°C) | 10.4×10-6/K |
| Thermal Expansion Coefficient (20-200°C) | 11.1×10-6/K |
| Thermal Expansion Coefficient (20-400°C) | 12.4×10-6/K |
| Specific Heat Capacity | 460 J/kg·K |
| Electrical Resistivity (20°C) | 0.60 µΩ·m |
| Magnetic Permeability | Ferromagnetic |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Round bars, flat bars, plates, sheets, blocks, forged pieces |
| Round Bar Diameter | 10 - 500 mm |
| Flat Bar Thickness | 5 - 200 mm |
| Plate Thickness | 10 - 300 mm |
| Standard Length | 3000 - 6000 mm (custom lengths available) |
| Surface Finish | Hot rolled, cold drawn, turned, ground, polished |
| Dimensional Tolerance | h9 to h11 (±0.1 to ±0.5 mm) |
| International Standards | EN 10088, ASTM A681, JIS SKD11, DIN 1.2379 |
| Heat Treatment Condition | Annealed, hardened & tempered, stress relieved |
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Our Advantages in Processing EN 1.2379
Advanced Vacuum Melting Technology
MetalZenith employs cutting-edge vacuum induction melting (VIM) and electroslag remelting (ESR) processes to achieve exceptional steel purity and homogeneity. Our controlled atmosphere production eliminates inclusions and ensures consistent carbide distribution throughout the material structure.
Comprehensive Quality Control System
Our state-of-the-art testing laboratory features advanced spectroscopic analysis, mechanical testing equipment, and non-destructive inspection capabilities. Every batch undergoes rigorous chemical composition verification, hardness testing, and microstructural analysis to guarantee compliance with international standards.
Custom Processing & Global Supply
MetalZenith offers extensive customization capabilities including precision machining, heat treatment services, and custom dimensions. Our global distribution network ensures reliable delivery worldwide, supported by technical expertise and comprehensive after-sales support for optimal application performance.
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