High-Efficiency Silicon Steel: Precision Engineered for Electromagnetic Applications.
Silicon Steel Overview: Ferrosilicon Alloys for Optimal Magnetic Performance
Silicon steel, a low-carbon iron-silicon alloy (0.5–4.5% Si), is the cornerstone of energy-efficient transformers, motors, and inductors. Our cold-rolled non-grain oriented (CRNGO) and grain-oriented (CRGO) variants deliver core losses as low as 1.2 W/kg at 1.5T/50Hz, with B50 magnetic induction up to 1.82 Tesla.
Key Features:
- Low Iron Loss: Reduces hysteresis by 40% vs. conventional steel
- High Permeability: Accelerates magnetic flux alignment (μmax: 1,500–2,000)
- Surface Precision: Ra ≤0.8μm roughness for minimized air gaps
Technical Specifications & Compliance
Grades & Standards
| Type | Grade | Core Loss (W/kg @1.5T/50Hz) | Thickness | Standard |
|---|---|---|---|---|
| CRNGO | 50W800 | ≤5.8 | 0.50mm | ASTM A683 |
| CRNGO | 50W600 | ≤4.2 | 0.35mm | IEC 60404-8 |
| CRGO | 30Q130 | ≤1.3 | 0.30mm | JIS C 2553 |
Material Properties:
- Silicon Content: 2.9–3.5% (CRNGO), 2.8–3.2% (CRGO)
- Carbon Content: ≤0.005% post-decarburization
- Coating: C5 or C6 insulation (3–6 μm, ≥20 Ω·cm² resistance)
Applications Across Industries
- Energy Distribution:
- Power Transformers: 50W600 CRNGO for 98.5% efficiency
- Solar Inverters: 0.23mm CRGO with 1.2 W/kg loss @1.7T
- E-Mobility:
- EV Motors: 0.35mm CRNGO reduces eddy current losses by 25%
- Consumer Electronics:
- High-Frequency Inductors: 0.10mm ultra-thin CRGO for 100–500 kHz operation
Manufacturing & Quality Assurance
- Hot Rolling: Slabs heated to 1,100°C and rolled to 2.3mm.
- Cold Rolling: Final gauge achieved via 85% reduction (CRNGO) or 93% (CRGO).
- Annealing: Decarburization at 820°C in H₂/N₂ atmosphere.
- Testing:
- Epstein Frame: Core loss verified per IEC 60404-2
- Coating Adhesion: Cross-cut test (ISO 2409 Grade 0)
Competitive Advantages
- MOQ Flexibility: 1-ton trial orders accepted
- Custom Slitting: Widths 40–1,200mm (±0.1mm tolerance)
- Fast Turnaround: Samples in 2 days, bulk orders in 3–10 days
Certifications & Logistics
- Standards: ASTM A876, IEC 60404-8, GB/T 2521
- Packaging: VCI-coated, moisture-proof wrapping
- Ports: Tianjin, Shanghai, Ningbo (FOB/CIF terms)
- Payment: LC, TT, Western Union
Packing And Delivery
