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Technical Specifications
Product Overview
Metallurgical Characteristics
Electrical steel features a specialized microstructure with optimized silicon content that increases electrical resistivity and reduces eddy current losses. The grain-oriented grades exhibit highly aligned {110}<001> texture through secondary recrystallization, while non-grain-oriented grades maintain uniform magnetic properties in all directions. The controlled silicon content enhances magnetic permeability while minimizing magnetostriction effects.
Heat Treatment Process
MetalZenith employs controlled decarburization annealing at 820-850°C followed by high-temperature secondary recrystallization annealing at 1150-1200°C for grain-oriented grades. Non-grain-oriented grades undergo stress relief annealing at 750-800°C with controlled cooling rates to optimize magnetic domain structure and minimize internal stresses.
Advanced Manufacturing Process
MetalZenith utilizes precision cold rolling with multiple reduction passes, followed by controlled atmosphere annealing and magnetic domain refinement through laser scribing or mechanical scribing. Our advanced coating application ensures optimal insulation properties and surface quality for lamination stacking.
Specialized Quality Testing
Comprehensive magnetic testing includes Epstein frame measurements for core loss determination, single sheet tester analysis for AC magnetic properties, magnetic aging tests at elevated temperatures, and frequency response characterization from 50Hz to 10kHz. Magnetostriction measurements ensure dimensional stability in operating conditions.
Application Engineering Considerations
For transformer cores, grain-oriented grades provide directional magnetic properties with minimal core losses in the rolling direction. Motor applications utilize non-grain-oriented grades for uniform radial and tangential magnetic properties. Relay and inductor applications benefit from high permeability and low coercivity characteristics, while magnetic shielding applications leverage high saturation induction and controlled permeability.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Silicon (Si) | 2.9 - 3.5 |
| Carbon (C) | ≤ 0.005 |
| Manganese (Mn) | 0.05 - 0.15 |
| Phosphorus (P) | ≤ 0.020 |
| Sulfur (S) | ≤ 0.008 |
| Aluminum (Al) | 0.020 - 0.050 |
| Nitrogen (N) | ≤ 0.008 |
| Iron (Fe) | Balance |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (MPa) | 360 - 440 |
| Yield Strength (MPa) | ≥ 300 |
| Elongation (%) | ≥ 7 |
| Hardness (HV) | 140 - 180 |
| Impact Toughness (J) | ≥ 15 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.65 |
| Electrical Resistivity (μΩ·cm) | 45 - 55 |
| Magnetic Permeability (μr) | 1800 - 2200 |
| Saturation Magnetic Induction (T) | 2.0 - 2.1 |
| Coercivity (A/m) | ≤ 80 |
| Core Loss at 1.5T, 50Hz (W/kg) | ≤ 1.3 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Sheets, Strips, Laminations, Coils |
| Thickness Range | 0.18 - 0.65mm |
| Width Range | 600 - 1200mm |
| Grain Orientation | Grain-Oriented (GO) & Non-Grain-Oriented (NGO) |
| Standards Compliance | ASTM A677, IEC 60404, JIS C2552 |
| Surface Treatment | Insulation Coating, Stress Relief Annealed |
| Stacking Factor | ≥ 0.95 |
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Our Advantages in Processing Electrical Steel
Advanced Magnetic Domain Processing
MetalZenith employs precision cold rolling and controlled annealing with magnetic domain refinement techniques to achieve optimal grain orientation and superior magnetic properties. Our advanced processing ensures consistent magnetic permeability and minimized core losses throughout the material thickness.
Comprehensive Magnetic Testing
MetalZenith conducts extensive magnetic property testing including core loss measurement at multiple frequencies, magnetic aging stability tests, permeability analysis, and AC magnetic property characterization. Our rigorous testing ensures consistent electrical performance and long-term magnetic stability.
Custom Electrical Solutions
MetalZenith provides tailored electrical steel solutions with custom silicon content, grain orientation, and surface treatments. Our technical team offers comprehensive support for lamination design, stacking factor optimization, and application-specific magnetic property requirements.
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