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Technical Specifications
Product Overview
Metallurgical Characteristics
L6 tool steel is a low-alloy oil hardening steel characterized by its unique combination of nickel and chromium additions, which provide exceptional toughness and impact resistance. The steel exhibits a fine-grained martensitic structure when properly heat treated, with carbide distribution optimized for maximum toughness. MetalZenith's advanced vacuum melting process ensures minimal segregation and uniform carbide distribution throughout the material.
Heat Treatment Process
The recommended heat treatment cycle begins with annealing at 760-790°C followed by slow cooling to achieve maximum machinability. Hardening is performed by austenitizing at 845-870°C, followed by oil quenching to achieve full hardness. Tempering at 150-650°C allows for precise hardness adjustment while maintaining optimal toughness levels. MetalZenith provides detailed heat treatment specifications and can perform custom heat treatment services.
Manufacturing Process Excellence
MetalZenith employs electric arc furnace melting with ladle refining and vacuum degassing to achieve superior cleanliness levels. Our continuous casting process ensures uniform chemical composition and microstructure. Hot rolling and forging operations are performed under controlled conditions to optimize grain flow and mechanical properties. Advanced non-destructive testing including ultrasonic inspection ensures internal soundness.
Quality Standards and Certifications
All L6 steel products manufactured by MetalZenith comply with international standards including ASTM A681, SAE J437, and equivalent EN specifications. Our quality management system is certified to ISO 9001:2015, ensuring consistent product quality and traceability. Comprehensive testing protocols include chemical analysis by optical emission spectroscopy, mechanical testing per ASTM standards, and microstructural examination to verify grain size and carbide distribution.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.65 - 0.75 |
| Manganese (Mn) | 0.10 - 0.50 |
| Silicon (Si) | 0.10 - 0.30 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 0.60 - 1.20 |
| Nickel (Ni) | 1.25 - 2.00 |
| Molybdenum (Mo) | 0.15 - 0.50 |
| Vanadium (V) | 0.15 - 0.30 |
| Copper (Cu) | ≤ 0.25 |
⚙️ Mechanical Properties
| Property | Value | Condition |
|---|---|---|
| Tensile Strength | 1380 - 1725 MPa | Hardened & Tempered |
| Yield Strength | 1240 - 1550 MPa | Hardened & Tempered |
| Elongation | 8 - 12% | Hardened & Tempered |
| Reduction of Area | 35 - 45% | Hardened & Tempered |
| Hardness (HRC) | 40 - 50 | Hardened & Tempered |
| Impact Energy (Charpy V) | 40 - 80 J | Room Temperature |
| Fatigue Limit | 620 - 780 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 | 12.5×10-6/K | 20-100°C |
| Specific Heat Capacity | 460 J/kg·K | 20°C |
| Electrical Resistivity | 0.18 µΩ·m | 20°C |
| Magnetic Permeability | Ferromagnetic | 20°C |
| Curie Temperature | 760°C | - |
📏 Product Specifications
| Specification | Available Options | Standards |
|---|---|---|
| Product Forms | Round bars, flat bars, plates, sheets, forged blocks | ASTM A681, SAE J437 |
| Round Bar Diameter | 6mm - 300mm | ±0.1mm tolerance |
| Flat Bar Dimensions | 10×20mm - 100×500mm | ±0.2mm tolerance |
| Plate Thickness | 5mm - 200mm | ±0.3mm tolerance |
| Surface Finish | Hot rolled, cold drawn, ground, polished | Ra 0.8 - 6.3 µm |
| Heat Treatment Condition | Annealed, normalized, hardened & tempered | Customer specified |
| Length | Up to 12 meters | Custom cutting available |
| Quality Standards | ISO 9001:2015, ASTM, EN, JIS | Full traceability |
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Our Advantages in Processing L6
Advanced Vacuum Degassing Technology
MetalZenith employs state-of-the-art vacuum degassing and ladle refining processes to achieve ultra-low inclusion levels and superior cleanliness in L6 steel production, resulting in enhanced toughness and fatigue resistance.
Precision Heat Treatment Control
Our computer-controlled heat treatment facilities with multi-zone temperature monitoring ensure optimal austenitizing and quenching parameters, delivering consistent hardness and microstructural uniformity across all L6 steel products.
Comprehensive Customization Services
MetalZenith offers extensive customization options including precision machining, surface treatments, and specialized heat treatment cycles tailored to specific application requirements, supported by our global supply chain network.
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