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Technical Specifications
Product Overview
Metallurgical Characteristics
H11 tool steel exhibits a tempered martensitic microstructure with uniformly distributed secondary carbides of chromium, molybdenum, and vanadium. The balanced alloy composition provides excellent hot hardness retention up to 600°C while maintaining superior toughness. The fine carbide distribution ensures exceptional wear resistance and thermal fatigue resistance critical for hot work applications.
Heat Treatment Process
MetalZenith employs controlled atmosphere hardening at 1010-1040°C followed by oil or air quenching, then tempering at 540-650°C depending on desired hardness. Our vacuum heat treatment capabilities eliminate decarburization and ensure uniform hardness distribution. Multiple tempering cycles optimize the carbide precipitation and stress relief for maximum tool life.
Advanced Manufacturing Process
Our H11 production utilizes vacuum induction melting (VIM) followed by electroslag remelting (ESR) to achieve exceptional cleanliness and homogeneity. Controlled forging and rolling operations ensure optimal grain flow and carbide distribution. Advanced annealing processes provide excellent machinability while maintaining uniform hardness throughout the cross-section.
Specialized Quality Testing
MetalZenith conducts comprehensive Rockwell hardness distribution mapping across tool sections, X-ray diffraction analysis for residual austenite content (typically <2%), detailed metallographic examination of carbide size and distribution, and rotating beam fatigue testing at elevated temperatures. Thermal shock testing simulates actual service conditions to validate tool performance.
Application-Specific Technical Considerations
For cutting tool applications, H11 provides excellent hot hardness and wear resistance with optimized edge retention. In die casting and forging operations, the superior thermal shock resistance and high-temperature strength ensure extended die life. For precision automotive components, the excellent hardenability and dimensional stability during heat treatment enable tight tolerance maintenance. In bearing applications, the balanced hardness and toughness provide reliable performance under high loads and temperatures.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.33 - 0.43 |
| Chromium (Cr) | 4.75 - 5.50 |
| Molybdenum (Mo) | 1.10 - 1.75 |
| Vanadium (V) | 0.30 - 0.60 |
| Silicon (Si) | 0.80 - 1.20 |
| Manganese (Mn) | 0.20 - 0.50 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Hardness (HRC) | 38 - 45 (Hardened & Tempered) |
| Compressive Strength (MPa) | 2400 - 2800 |
| Impact Toughness (J) | 15 - 25 (Charpy V-notch) |
| Wear Resistance Index | Excellent (8.5/10) |
| Hardenability (DI) | 6.5 - 8.0 inches |
| Fatigue Strength (MPa) | 800 - 1000 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.80 |
| Melting Point (°C) | 1480 - 1520 |
| Thermal Conductivity (W/m·K) | 24.5 (at 20°C) |
| Thermal Expansion (×10??/K) | 11.9 (20-100°C) |
| Elastic Modulus (GPa) | 215 |
| Poisson's Ratio | 0.27 - 0.30 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Bars, Blocks, Plates, Forgings, Custom Shapes |
| Diameter Range | 10 - 500mm |
| Thickness Range | 5 - 300mm |
| Length Range | 500 - 6000mm |
| Standards Compliance | ASTM A681, DIN 1.2343, JIS SKD6 |
| Heat Treatment Condition | Annealed, Hardened & Tempered, or As-Forged |
| Surface Finish | Hot Rolled, Machined, Ground, or Polished |
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Our Advantages in Processing H11 Tool Steel
Advanced Vacuum Melting Technology
MetalZenith utilizes state-of-the-art vacuum induction melting (VIM) and electroslag remelting (ESR) processes to achieve exceptional steel cleanliness and homogeneity. Our controlled atmosphere processing eliminates inclusions and ensures uniform carbide distribution, resulting in superior tool performance and extended service life.
Comprehensive Tool Steel Testing
Our specialized testing protocols include Rockwell hardness distribution mapping, residual austenite content analysis using X-ray diffraction, carbide distribution evaluation through metallographic analysis, and rotating beam fatigue strength testing. These advanced quality measures ensure consistent performance in critical tooling applications.
Custom Heat Treatment Solutions
MetalZenith offers tailored heat treatment services including vacuum hardening, precise tempering cycles, and cryogenic treatment options. Our metallurgical experts provide comprehensive technical support for optimizing tool performance in specific applications, from die casting to precision machining operations.
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