Premium Cold-Rolled Non-Oriented Silicon Steel: Optimized for High-Efficiency Electromagnetic Devices.
Non-Oriented Electrical Steel (NOES): Key Properties & Applications
Engineered for motors, generators, and EV drivetrains, our cold-rolled non-oriented silicon steel delivers isotropic magnetic properties (uniform flux density in all directions) with silicon content 2.5–3.5%. Available in grades 50W1300 to 50W600, it achieves core losses as low as 4.2 W/kg @1.5T/50Hz while maintaining B50 induction ≥1.67 Tesla.
Standards Compliance:
- DIN EN 10106 (EU)
- GB/T 2521 (China)
- JIS C 2552 (Japan)
- ASTM A677 (USA)
Technical Specifications & Magnetic Performance
Core Loss (P1.5/50) & Induction (B50)
| Grade | Max. Core Loss (W/kg) | Min. Induction (T) | Typical Thickness |
|---|---|---|---|
| 50W1300 | ≤7.5 | ≥1.74 | 0.50mm/0.65mm |
| 50W800 | ≤5.8 | ≥1.70 | 0.50mm |
| 50W600 | ≤4.2 | ≥1.67 | 0.35mm/0.50mm |
Surface Treatment:
- C5 Coating: 3–5 μm inorganic layer (surface resistance >20 Ω·cm²)
- Stress Relief Annealing: 800–850°C in H₂/N₂ atmosphere
Mechanical & Dimensional Tolerances
| Parameter | Tolerance | Testing Standard |
|---|---|---|
| Thickness (0.50mm) | ±0.02mm | ISO 9444 |
| Flatness | ≤3mm/m | ASTM A1037 |
| Hardness (HV) | 150–190 | ISO 6507 |
| Density | 7.65 g/cm³ | Archimedes method |
Width Options:
- Standard: 1000mm/1100mm/1200mm
- Custom: 40mm–1200mm (slit-to-width service available)
Manufacturing Process & Quality Control
- Hot Rolling: Slabs reduced to 2.3mm thickness at 1,100°C.
- Cold Rolling: Final gauge achieved via 85% reduction.
- Decarburization: Annealed at 820°C to lower carbon to ≤0.005%.
- Coating: Tension-coated with MgO-based insulation.
Quality Assurance:
- Epstein Frame Testing: IEC 60404-2 for core loss verification
- Coating Adhesion: Cross-cut test per ISO 2409
Applications by Industry
- E-Mobility:
- EV Traction Motors: 0.35mm 50W600 steel for 98% efficiency (WLTP cycle)
- Industrial Machinery:
- 15kW–5MW Generators: 0.50mm 50W800 steel with 1.70T induction
- Renewable Energy:
- Wind Turbine Converters: 0.65mm 50W1300 grade
Competitive Advantages
| Feature | Benefit |
|---|---|
| Ultra-Thin Options | 0.20mm custom gauges reduce eddy losses |
| Custom Slitting | ±0.1mm width tolerance for stator cores |
| MOQ Flexibility | 2-ton trial orders accepted |
Packing And Delivery
