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Technical Specifications
Product Overview
Metallurgical Characteristics
Knife Steel exhibits a martensitic microstructure with fine, uniformly distributed chromium carbides that provide exceptional wear resistance and edge retention. The high carbon content combined with chromium and molybdenum creates a matrix of tempered martensite with secondary carbide precipitation, optimizing the balance between hardness and toughness essential for cutting applications.
Heat Treatment Process
MetalZenith employs controlled atmosphere hardening at 1030-1065°C followed by immediate quenching in oil or air. Tempering is performed at 150-200°C to achieve target hardness while maintaining corrosion resistance. Our proprietary sub-zero treatment at -80°C ensures complete austenite transformation and dimensional stability.
Manufacturing Process
MetalZenith utilizes vacuum induction melting followed by electroslag remelting to achieve exceptional cleanliness and homogeneity. Hot working is performed with precise temperature control to optimize carbide distribution, followed by controlled cooling and stress relief annealing before final heat treatment.
Specialized Quality Testing
Our comprehensive testing protocol includes pitting potential measurement (ASTM G61), intergranular corrosion testing (ASTM A262 Practice A), stress corrosion cracking evaluation in 3.5% NaCl solution, and passivation film thickness analysis using X-ray photoelectron spectroscopy. Edge retention testing and microstructural analysis ensure consistent cutting performance.
Application-Specific Considerations
For medical instruments, our steel meets biocompatibility requirements with superior corrosion resistance in body fluids. Food industry applications benefit from FDA compliance and resistance to organic acids. Chemical equipment applications leverage excellent resistance to mild acids and oxidizing environments. Marine applications utilize the steel's resistance to chloride-induced corrosion, while architectural applications benefit from long-term aesthetic stability and minimal maintenance requirements.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.95 - 1.20 |
| Chromium (Cr) | 17.0 - 18.0 |
| Molybdenum (Mo) | 0.75 - 1.20 |
| Vanadium (V) | 0.07 - 0.12 |
| Silicon (Si) | ≤ 1.00 |
| Manganese (Mn) | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 1900 |
| Tensile Strength (MPa) | 2000 - 2200 |
| Elongation (%) | ≥ 8 |
| Hardness (HRC) | 58 - 62 |
| Corrosion Resistance | Excellent in mild acids |
| Impact Energy (J) | ≥ 15 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.70 |
| Melting Point (°C) | 1480 - 1530 |
| Thermal Conductivity (W/m·K) | 24.2 |
| Thermal Expansion (×10??/K) | 10.4 |
| Electrical Resistivity (μΩ·cm) | 60 |
| Elastic Modulus (GPa) | 200 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Bars, Sheets, Strips, Wire, Forgings |
| Thickness Range | 0.5 - 50mm |
| Width Range | 10 - 1500mm |
| Length Range | 500 - 6000mm |
| Standards Compliance | ASTM A681, AISI 440C, DIN 1.4125 |
| Heat Treatment Condition | Hardened & Tempered |
| Surface Finish | Bright Annealed, Polished, Ground |
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Our Advantages in Processing Knife Steel
Precision Vacuum Melting Technology
MetalZenith utilizes advanced vacuum induction melting with controlled atmosphere processing to achieve exceptional steel purity and uniform carbide distribution. Our precision heat treatment cycles with computer-controlled quenching and tempering ensure optimal hardness and toughness balance for superior cutting performance.
Comprehensive Corrosion Testing
MetalZenith conducts extensive corrosion testing including pitting potential measurement (>300mV vs SCE), ASTM A262 intergranular corrosion testing, stress corrosion cracking evaluation in chloride environments, and passivation film thickness analysis using XPS technology to ensure maximum corrosion resistance in service.
Custom Processing & Technical Support
MetalZenith offers comprehensive custom processing services including precision machining, specialized heat treatment cycles, surface finishing, and edge geometry optimization. Our metallurgical engineers provide technical support for application-specific requirements and performance optimization.
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