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Technical Specifications
Product Overview
Metallurgical Characteristics
O2 tool steel exhibits a martensitic microstructure after oil quenching with fine, uniformly distributed carbides primarily consisting of iron carbides (Fe3C). The high carbon content provides excellent wear resistance, while the controlled alloy additions of manganese, chromium, and tungsten enhance hardenability and dimensional stability during heat treatment.
Heat Treatment Process
MetalZenith employs controlled atmosphere furnaces for optimal heat treatment. Hardening is performed at 790-815°C followed by oil quenching to achieve maximum hardness. Tempering at 150-200°C provides the optimal balance of hardness and toughness for cutting tool applications. Stress relieving at 650-680°C is recommended for complex geometries.
Manufacturing Process
Our O2 tool steel production begins with vacuum induction melting to ensure chemical homogeneity and minimal inclusion content. Controlled forging operations with precise temperature monitoring optimize grain structure and carbide distribution. Final processing includes precision machining and surface finishing to meet exact dimensional requirements.
Specialized Quality Testing
MetalZenith conducts comprehensive testing including Rockwell hardness distribution mapping across cross-sections, X-ray diffraction analysis for retained austenite content (typically <5%), metallographic evaluation of carbide size and distribution, and rotating beam fatigue testing to validate tool life performance under cyclic loading conditions.
Application-Specific Considerations
For cutting tool applications, O2 provides excellent machinability in the annealed condition and superior edge retention after hardening. In precision gauge manufacturing, the steel's dimensional stability and fine grain structure ensure accurate measurements. For automotive stamping dies, the balanced toughness and wear resistance deliver consistent forming performance and extended die life.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.85 - 0.95 |
| Manganese (Mn) | 1.00 - 1.40 |
| Silicon (Si) | 0.20 - 0.50 |
| Chromium (Cr) | 0.25 - 0.50 |
| Tungsten (W) | 0.40 - 0.60 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.025 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Hardness (HRC) | 60 - 64 |
| Compressive Strength (MPa) | 2800 - 3200 |
| Impact Toughness (J) | 15 - 25 |
| Wear Resistance Index | Good (7/10) |
| Hardenability (mm) | 25 - 50 |
| Fatigue Strength (MPa) | 800 - 1000 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.85 |
| Melting Point (°C) | 1460 - 1500 |
| Thermal Conductivity (W/m·K) | 42.7 |
| Thermal Expansion (×10??/K) | 11.9 |
| Elastic Modulus (GPa) | 210 |
| Poisson's Ratio | 0.27 - 0.30 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Round Bars, Flat Bars, Plates, Tool Blanks |
| Diameter Range | 6 - 300mm |
| Thickness Range | 3 - 150mm |
| Length Range | 500 - 6000mm |
| Standards Compliance | ASTM A681, DIN 1.2510, JIS SKS3 |
| Surface Condition | Annealed, Precision Ground, Machined |
| Tolerance Grade | h9 to h11 (Standard), h6 to h8 (Precision) |
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Our Advantages in Processing O2 Tool Steel
Precision Vacuum Melting Technology
MetalZenith utilizes advanced vacuum induction melting followed by electroslag remelting to achieve exceptional chemical homogeneity and minimal inclusion content. Our controlled forging process with precise temperature monitoring ensures optimal grain structure and carbide distribution for superior tool performance.
Comprehensive Tool Steel Testing
Our specialized testing protocols include Rockwell hardness distribution mapping, retained austenite content analysis using X-ray diffraction, carbide distribution evaluation through metallographic analysis, and rotating beam fatigue testing to ensure optimal tool life and performance reliability.
Custom Heat Treatment Services
MetalZenith offers tailored heat treatment solutions including precise hardening, tempering, and stress relieving services. Our experienced metallurgists provide technical consultation for optimal processing parameters to meet specific application requirements and performance criteria.
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