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Technical Specifications
Product Overview
Metallurgical Characteristics
S2 tool steel exhibits a tempered martensitic microstructure with fine, uniformly distributed carbides. The silicon content enhances shock resistance while molybdenum and tungsten additions provide secondary hardening effects and improved hot hardness. The controlled carbon content ensures optimal balance between hardness and toughness for impact applications.
Heat Treatment Process
MetalZenith employs controlled atmosphere hardening at 870-900°C followed by oil or air quenching, depending on section size. Tempering is performed at 150-650°C based on desired hardness levels. Our specialized heat treatment cycles include stress relieving at 650°C and selective hardening for complex geometries.
Manufacturing Process
Our S2 production begins with vacuum induction melting followed by electroslag remelting for maximum cleanliness. Controlled forging operations with precise temperature monitoring ensure optimal grain flow and eliminate internal defects. Final machining and grinding operations maintain tight dimensional tolerances.
Specialized Quality Testing
MetalZenith conducts comprehensive Rockwell hardness distribution mapping across tool sections, X-ray diffraction analysis for retained austenite content (typically <5%), metallographic examination for carbide size and distribution uniformity, and rotating beam fatigue testing at 10? cycles to ensure reliability in shock-loading applications.
Application-Specific Considerations
For cutting tool applications, S2 provides excellent edge retention and impact resistance. In die and mold manufacturing, the material offers superior toughness for complex geometries. Bearing applications benefit from the uniform hardness and fine carbide structure. Precision machinery components utilize S2's dimensional stability and wear resistance. Automotive applications leverage the material's fatigue resistance and consistent performance under cyclic loading conditions.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.40 - 0.45 |
| Manganese (Mn) | 0.30 - 0.50 |
| Silicon (Si) | 0.90 - 1.20 |
| Chromium (Cr) | 0.15 - 0.30 |
| Molybdenum (Mo) | 0.40 - 0.60 |
| Phosphorus (P) | ≤ 0.025 |
| Sulfur (S) | ≤ 0.025 |
| Tungsten (W) | 0.40 - 0.60 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Hardness (HRC) | 57 - 62 |
| Compressive Strength (MPa) | ≥ 2800 |
| Impact Toughness (J) | 15 - 25 |
| Wear Resistance Index | 8.5 - 9.2 |
| Hardenability (mm) | 25 - 40 |
| Tensile Strength (MPa) | 1900 - 2100 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.85 |
| Melting Point (°C) | 1480 - 1520 |
| 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, Forgings, Custom Shapes |
| Diameter Range | 6 - 300mm |
| Thickness Range | 3 - 150mm |
| Length Range | 500 - 6000mm |
| Standards Compliance | ASTM A681, AISI S2, DIN 1.2542 |
| Heat Treatment Condition | Annealed, Hardened & Tempered, or As-Forged |
| Surface Finish | Hot Rolled, Cold Drawn, Machined, or Ground |
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Our Advantages in Processing S2 Tool Steel
Advanced Vacuum Melting Technology
MetalZenith utilizes vacuum induction melting followed by electroslag remelting to achieve exceptional cleanliness and homogeneity in S2 tool steel. Our controlled forging process with precise temperature monitoring ensures optimal grain structure and eliminates internal defects, resulting in superior toughness and reliability.
Comprehensive Quality Testing Protocol
Our specialized testing program includes Rockwell hardness distribution mapping, retained austenite content analysis using X-ray diffraction, carbide distribution evaluation through metallographic examination, and rotating beam fatigue testing to guarantee consistent performance in shock-loading applications.
Custom Heat Treatment Solutions
MetalZenith offers tailored heat treatment services including selective hardening, stress relieving, and specialized tempering cycles. Our metallurgical engineers provide comprehensive technical support to optimize S2 tool steel properties for specific applications, ensuring maximum tool life and performance.
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