Ultra Thin Silicon Steel
High Permeability Electrical Steel Strip for Transformer, Motor & Inductance Core Manufacturing
Product Overview
Ultra thin silicon steel manufactured by Wuxi Zhongxin Special Steel represents a premium-grade soft magnetic alloy specifically engineered for advanced high-frequency electromagnetic applications where conventional electrical steel reaches its operational and efficiency limits.
Through precision cold rolling, controlled decarburization, and advanced continuous annealing technology, our ultra-thin electrical steel achieves exceptional magnetic performance. It significantly reduces eddy current losses across elevated operating frequencies ranging from 400 Hz to 20 kHz (and up to 50 kHz for specialized grades).
As global demand intensifies for higher power density, improved energy efficiency, and miniaturization of electromagnetic components, this thin gauge silicon steel has emerged as an indispensable core material across the modern electrical industry.
We supply high permeability silicon steel that serves as the foundational material for:
- High-frequency transformers & Switching Mode Power Supplies (SMPS)
- Precision servo motors & Electric Vehicle (EV) traction motors
- Aerospace 400 Hz power supplies & generators
- Uninterruptible Power Systems (UPS) & inductors
- Renewable energy conversion equipment
Available in both non-oriented (NGOES) and grain-oriented (GOES) variants, our thin-gauge magnetic materials meet the demanding requirements of OEM transformer manufacturers, motor core stamping plants, and electromagnetic component suppliers worldwide. With a strong commitment to consistent quality, technical support, and global logistics capability, Wuxi Zhongxin Special Steel is your trusted B2B partner for reliable bulk wholesale supply.
Key Features & Advantages
Ultra-Low Iron Loss: Substantially reduces thermal generation at medium and high frequencies, improving overall energy efficiency and extending equipment lifespan.
High Magnetic Permeability: Ensures superior magnetic flux density, enhanced inductor performance, and improved transformer regulation characteristics.
Excellent Surface Insulation: Specialized inorganic or semi-organic coatings minimize inter-laminar eddy currents and provide outstanding heat resistance during welding and annealing.
Superior Flatness & Dimensional Accuracy: Facilitates precision stamping, lamination stacking, and core assembly with minimal scrap rate.
Stable Magnetic Properties: Consistent batch-to-batch performance with minimal magnetic aging effect under long-term operation.
Exceptional Stamping Workability: Optimized for high-speed progressive die operations, reducing tool wear and improving production yield.
High Mechanical Strength: Maintains structural integrity in high-speed rotating applications such as EV traction motors.
Outstanding Anti-Corrosion Performance: Advanced surface coating provides extended shelf life and protects against humidity-related oxidation during international transit.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Name | Ultra Thin Silicon Steel Strip / Sheet |
| Manufacturer | Wuxi Zhongxin Special Steel |
| Thickness Range | 0.05 mm, 0.08 mm, 0.10 mm, 0.15 mm, 0.18 mm，0.20mm |
| Width Range | 5 mm – 1200 mm (custom slitting available) |
| Length | Coil or cut-to-length sheets |
| Surface Coating | Inorganic / Semi-organic insulation coating |
| Silicon Content | 3.0% – 6.5% (Si-Fe alloy) |
| Density | 7.55 – 7.65 g/cm³ |
| Resistivity | 45 – 82 μΩ·cm |
| Saturation Induction (Bs) | 1.80 – 2.03 T |
| Operating Frequency | 400 Hz – 20 kHz |
| Edge Condition | Mill edge / Slit edge |
| Delivery Condition | Fully annealed, insulation-coated |
| Surface Quality | Free from cracks, scratches, rust, and inclusions |
Standard Grades
Non-Oriented Ultra Thin Silicon Steel
Non-oriented ultra-thin electrical steel exhibits isotropic magnetic properties in all rolling directions, making it the optimal choice for rotating electrical machines where magnetic flux changes direction continuously. It is widely applied in high-frequency motors, EV traction motors, servo systems, and high-speed generators.
| Grade | Thickness (mm) | Iron Loss P (W/kg) | Application |
|---|---|---|---|
| 10JNEX900 / GT-NO-100 | 0.10 | ≤ 9.0 (1.0T/400Hz) | High-frequency motors, servo drives |
| 15JNEX / GT-NO-150 | 0.15 | ≤ 13.0 (1.0T/400Hz) | EV traction motors, industrial automation |
| 18JNEH / GT-NO-180 | 0.18 | ≤ 14.5 (1.0T/400Hz) | High-speed industrial motors |
| 20JNEH / GT-NO-200 | 0.20 | ≤ 15.5 (1.0T/400Hz) | High-speed motors, aerospace generators |
Grain Oriented Ultra Thin Silicon Steel
Grain-oriented ultra thin silicon steel offers anisotropic magnetic properties achieved through carefully controlled secondary recrystallization and Goss texture optimization, delivering superior permeability and minimum iron loss along the rolling direction. This material is exceptionally well-suited for stationary magnetic flux applications such as high-frequency transformers, reactors, and precision inductors.
| Parameter | Specification |
|---|---|
| Product Name | Ultra Thin Silicon Steel Strip / Sheet |
| Manufacturer | Wuxi Zhongxin Special Steel |
| Thickness Range | 0.05 mm, 0.08 mm, 0.10 mm, 0.15 mm, 0.18 mm，0.20mm |
| Width Range | 5 mm – 1200 mm (custom slitting available) |
| Length | Coil or cut-to-length sheets |
| Surface Coating | Inorganic / Semi-organic insulation coating |
| Silicon Content | 3.0% – 6.5% (Si-Fe alloy) |
| Density | 7.55 – 7.65 g/cm³ |
| Resistivity | 45 – 82 μΩ·cm |
| Saturation Induction (Bs) | 1.80 – 2.03 T |
| Operating Frequency | 400 Hz – 20 kHz |
| Edge Condition | Mill edge / Slit edge |
| Delivery Condition | Fully annealed, insulation-coated |
| Surface Quality | Free from cracks, scratches, rust, and inclusions |
Performance Distinction Notice: Non-oriented grades provide uniform magnetic response in every direction, making them ideal for rotational flux applications like motors. Conversely, grain-oriented grades deliver maximum permeability and minimum iron loss specifically along the rolling direction, making them optimal for stationary applications like transformers and inductors. Our technical engineers can assist you in selecting the appropriate grade and thickness based on your design requirements.
Industrial Application Fields
High-Frequency Transformers: SMPS, telecom rectifiers, UPS systems, induction heating equipment.
Aerospace & Aviation Power Units: 400 Hz onboard power systems requiring lightweight, high-efficiency magnetic cores.
Precision Motors & Servo Motors: Industrial automation, robotics, CNC machine tools, semiconductor manufacturing.
New Energy Vehicle (NEV) Traction Motors: High-speed permanent magnet synchronous motors, hybrid electric drive systems.
Inductors, Chokes & Filters: Power electronics, EMI/RFI suppression, PFC modules.
Magnetic Amplifiers & Reactors: Voltage regulation systems, current limiting devices, harmonic filtering.
Renewable Energy Equipment: Solar photovoltaic inverters, wind power converters, energy storage systems.
Manufacturing & Quality Advantages
Wuxi Zhongxin Special Steel operates state-of-the-art cold rolling mills, continuous annealing lines, tension leveling equipment, and precision slitting machinery. Our quality control laboratory is equipped with Epstein frames, single-sheet testers, and Soken-type magnetic measurement systems to guarantee absolute precision.
Rigorous Testing: Each production coil undergoes multi-stage testing, including thickness tolerance verification ($\pm$0.005 mm), multi-frequency magnetic measurement, surface insulation resistance testing, and chemical spectrum analysis.
Full Traceability: Our quality management system complies fully with ISO 9001:2015, ensuring all materials are traceable from raw material to finished product.
Strategic Logistics: Located in Wuxi, Jiangsu, we enjoy convenient access to Shanghai Port, Ningbo Port, and Shanghai Pudong Airport, providing competitive logistics advantages for international shipping.
Flexible Capacity: Our integrated production supports both small-batch prototype development and large-scale bulk supply for global OEM customers.
Packing, Shipment & Trade Terms
Standard Export Packing: Moisture-proof kraft paper, edge protectors, wooden pallet base, steel strap reinforcement, anti-rust VCI film, and plastic outer cover.
Coil Weight: 100 kg to 5,000 kg per coil (customizable based on your slitting line capacity).
Clear Marking: Grade, thickness, dimensions, batch number, net weight, manufacturer (Wuxi Zhongxin Special Steel), and production date.
International Standards Compliance: JIS C 2552 / C 2553, IEC 60404-8, ASTM A876, GB/T 2521, and EN 10107.
Flexible Lead Time: 7 – 25 working days depending on order quantity and customization requirements.
Complete Documentation: Commercial Invoice, Packing List, Bill of Lading, Certificate of Origin (Form A, FORM E, CO), Mill Test Certificate (MTC), and MSDS
FAQ