Grain-Oriented Silicon Steel Coils: Precision Core Material for High-Efficiency Transformers.
Low-Loss Grain-Oriented Steel (GOES) for Energy-Saving Applications.
Optimized for power transformers and high-frequency inductors, our grain-oriented silicon steel coils feature ≤0.85 W/kg core loss @1.7T/50Hz and B800 induction ≥1.82T. Available in thicknesses from 0.18mm to 0.65mm, these coils minimize no-load losses by up to 30% in grid and renewable energy systems.
Key Features:
- Ultra-Thin Options: 0.18mm (high-frequency) to 0.65mm (heavy-duty)
- Global Certifications: ASTM A876, JIS C 2552, EN 10107, GB/T 2521
- Custom Sizes: Widths 700–1,500mm (±0.1mm tolerance), lengths as required
Technical Specifications & Grading Standards
Core Performance by Grade
| Grade | Thickness | Core Loss (W/kg) | Permeability (B800) | Equivalent Standards |
|---|---|---|---|---|
| 35W230 | 0.35mm | ≤2.30 @1.5T/50Hz | ≥1.62T | ASTM A677M, JIS 35A230, EN M235-35A |
| 50W290 | 0.50mm | ≤2.90 @1.5T/50Hz | ≥1.72T | GB/T 50A290, JIS 47F165, EN M290-50A |
| 65W1300 | 0.65mm | ≤13.0 @1.5T/50Hz | ≥1.88T | IEC 60404-8, JIS 65A1300 |
Material Properties:
- Silicon Content: 3.0–3.3%
- Insulation Coating: C5 (Cr-free, ≥20 Ω·cm² surface resistance)
- Flatness: ≤1.5mm/m deviation (ASTM A1037)
Applications & Industry Compliance
- Power Transformers:
- 50W470 Grade: Reduces no-load losses by 25% in 500kVA–1,000MVA units
- EV Charging Stations:
- 0.20mm Ultra-Thin Coils: ≤0.95 W/kg loss @10kHz for compact inductors
- Industrial Motors:
- 35W300 Grade: 97% stacking factor for high-torque applications
Certifications:
- ISO 9001: Quality management
- CE/RoHS: Eco-friendly compliance
- MTC/BV: Third-party validated
Manufacturing & Quality Assurance
- Cold Rolling: Precision reduction to ±0.005mm thickness tolerance.
- Decarburization Annealing: 820°C in H₂/N₂ atmosphere (carbon ≤0.003%).
- Laser Scribing: Domain refinement for 15–20% lower hysteresis loss.
- Testing:
- Epstein Frame: Core loss validated per IEC 60404-2
- Coating Adhesion: Cross-cut test (Grade 0 per ISO 2409)
Competitive Advantages
| Parameter | Our GOES Coils | Industry Average |
|---|---|---|
| Core Loss | 0.85–13.0 W/kg | 1.20–15.0 W/kg |
| Lead Time | 7–15 days | 25–30 days |
| Width Range | 700–1,500mm (±0.1mm) | Limited to 1,250mm |
Why Choose Us?
- 5,000-Ton Stock: Ready-to-ship coils in TISCO, Baosteel, and POSCO grades
- 30% Advance Payment: Flexible terms for bulk orders
- Custom Packaging: Waterproof wrapping + wooden pallets
Product Show
Supplier of various types of carbon steel
Luo Kaiwei Steel Company is a comprehensive steel supplier that produces a variety of carbon steel plates, carbon steel pipes, galvanized steel, carbon steel coils, and steel profiles.
