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Technical Specifications
Product Overview
Metallurgical Characteristics
St14 tool steel features a martensitic microstructure with uniformly distributed carbides after proper heat treatment. The controlled addition of chromium, tungsten, and vanadium creates a fine carbide network that provides exceptional wear resistance while maintaining adequate toughness. The steel exhibits excellent hardenability and dimensional stability during heat treatment processes.
Heat Treatment Process
MetalZenith employs controlled atmosphere hardening at 820-850°C followed by oil or air quenching, depending on section size. Tempering is performed at 150-200°C for maximum hardness or 400-500°C for improved toughness. Sub-zero treatment at -80°C may be applied to reduce retained austenite content and enhance dimensional stability.
Manufacturing Process
Our St14 production utilizes vacuum induction melting followed by electroslag remelting to ensure exceptional cleanliness. Controlled forging operations with precise temperature monitoring optimize grain flow and carbide distribution. Advanced annealing processes prepare the material for subsequent machining and heat treatment operations.
Specialized Quality Testing
MetalZenith conducts comprehensive Rockwell hardness distribution mapping across tool sections, retained austenite content analysis using X-ray diffraction, carbide size and distribution evaluation through metallographic analysis, and rotating beam fatigue strength testing at various stress levels to ensure optimal performance in cyclic loading applications.
Application-Specific Considerations
For cutting tool applications, St14 provides excellent edge retention and thermal stability. In die and mold manufacturing, the steel offers superior surface finish capability and dimensional accuracy. Bearing applications benefit from the material's high contact fatigue resistance and low inclusion content. Precision mechanical components utilize the steel's excellent machinability in the annealed condition and superior wear resistance after hardening. Automotive applications leverage the material's consistent quality and reliable performance under demanding service conditions.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.95 - 1.05 |
| Chromium (Cr) | 1.30 - 1.60 |
| Tungsten (W) | 1.20 - 1.50 |
| Vanadium (V) | 0.15 - 0.30 |
| Manganese (Mn) | 0.20 - 0.40 |
| Silicon (Si) | 0.20 - 0.40 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Hardness (HRC) | 60 - 64 |
| Compressive Strength (MPa) | ≥ 2800 |
| Impact Toughness (J) | 15 - 25 |
| Wear Resistance Index | 8.5 - 9.2 |
| Hardenability (mm) | 25 - 40 |
| Fatigue Strength (MPa) | ≥ 850 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.80 |
| Melting Point (°C) | 1420 - 1460 |
| Thermal Conductivity (W/m·K) | 24.5 |
| Thermal Expansion (×10??/K) | 11.8 |
| Elastic Modulus (GPa) | 210 |
| Poisson's Ratio | 0.27 - 0.30 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Rounds, Flats, Squares, Tool Blanks, Custom Forgings |
| Diameter Range | 10 - 500mm |
| Thickness Range | 5 - 200mm |
| Length Range | 100 - 6000mm |
| Standards Compliance | ASTM A681, ISO 4957, DIN 1.2210 |
| Heat Treatment Condition | Annealed, Hardened & Tempered, or As-Forged |
| Surface Finish | Black, Turned, Ground, or Polished |
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Our Advantages in Processing St14 Tool Steel
Advanced Vacuum Melting Technology
MetalZenith utilizes vacuum induction melting and electroslag remelting processes with precise temperature control to achieve exceptional cleanliness and uniform carbide distribution. Our advanced melting technology eliminates inclusions and ensures consistent mechanical properties throughout the material cross-section.
Comprehensive Tool Steel Testing
MetalZenith conducts specialized testing protocols including Rockwell hardness distribution mapping, retained austenite content analysis, carbide size and distribution evaluation, and rotating beam fatigue strength testing. Our advanced metallurgical laboratory ensures optimal microstructure for demanding tool applications.
Custom Heat Treatment Services
MetalZenith offers specialized heat treatment services including vacuum hardening, sub-zero treatment, and precision tempering with computer-controlled atmosphere furnaces. Our metallurgical experts provide customized processing parameters to optimize performance for specific tooling applications.
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