Wuxi Zhongxin Special Steel, located in Wuxi City, Jiangsu Province, is a service-oriented enterprise specializing in precision slitting, processing, and distribution of non-oriented silicon steel strip (cold rolled non-oriented electrical steel strip). We provide high-quality non-oriented silicon steel materials to the domestic and international motor, electrical appliance, and power equipment manufacturing industries. We offer high-precision, high-performance, and cost-effective non-oriented silicon steel strip solutions for automotive motors, household appliances, industrial motors, transformers, new energy vehicle drive motors, and other fields.
Non-Oriented Silicon Steel Strip Product Series
Non-oriented silicon steel strip, fully named cold rolled non-oriented electrical steel strip, is a silicon-iron soft magnetic alloy with extremely low carbon content, typically containing 0.5%–4.5% silicon. Its grains are randomly oriented, providing uniform electromagnetic properties in all directions. It is the core material for manufacturing various motor, generator, and transformer cores. The product is usually supplied in coil form and, after precision slitting, is used for core laminations of motor stators and rotors.
Standard Non-Oriented Silicon Steel Strip
Produced from hot-rolled non-oriented silicon steel coils through cold rolling, annealing, and insulation coating treatment. The surface is smooth and clean, offering good processability and stable electromagnetic properties. Widely used in various motor cores, small transformers, chokes, relays, electromagnetic switches, and other applications.
- Iron Loss Grade: P1.5/50 ranges from 3.0 to 13.0 W/kg depending on grade
- Magnetic Flux Density: B50 ≥ 1.62–1.72 T
- Lamination Factor: ≥ 95%–97%
- Surface Coating: Multiple insulation coating options available (see coating description)
High-Grade Non-Oriented Silicon Steel Strip
High-grade products with thicknesses of 0.20 mm, 0.27 mm, 0.30 mm, 0.35 mm, etc., featuring lower iron loss and higher magnetic flux density. Suitable for high-efficiency motors and inverter compressors with strict energy efficiency requirements. Among these, the 0.35 mm high-grade product is widely used in new energy vehicle drive motors, high-efficiency industrial motors, and magnetic core materials for air conditioner and refrigerator compressors in the home appliance industry.
- High-Grade Iron Loss: P1.5/50 ≤ 3.0–4.7 W/kg
- High-Grade Magnetic Flux Density: B50 ≥ 1.62–1.66 T
- Lamination Factor: ≥ 95%–97%
Custom-Processed Non-Oriented Silicon Steel Strip
Precision slitting of standard-width non-oriented silicon steel master coils according to customer dimensional requirements. Width range covers 7 mm to 1250 mm, thickness range covers 0.15 mm to 1.0 mm. Slitting width tolerance is controlled within ±0.10 mm, with strict burr height control to ensure smooth high-speed stamping and lamination processes.
- Slitting Precision: Width tolerance ±0.05–0.10 mm
- Burr Control: ≤ 0.03 mm
- Edge Quality: Smooth, no edge wave, no sticking
Raw Material — Non-Oriented Silicon Steel Strip
| Parameter | Details |
| Substrate Type | Cold rolled non-oriented electrical steel |
| Common Grades | Low grades: 50W1300, 50W1000, 50W800, etc.; Medium grades: 50W600, 50W540, 50W470, etc.; High grades: 35W440, 35W300, 35W270, etc. |
| Standard Thickness | 0.15 mm, 0.20 mm, 0.27 mm, 0.30 mm, 0.35 mm, 0.50 mm, 0.65 mm |
| Nominal Width | 950 mm – 1250 mm (master coil) |
| Guaranteed Iron Loss (P1.5/50) | Low grade ≤ 6.0–13.0 W/kg, medium grade ≤ 4.7–6.0 W/kg, high grade ≤ 2.5–4.7 W/kg |
| Magnetic Flux Density (B50) | ≥ 1.62 T (some high grades can reach above 1.72 T) |
| Lamination Factor | ≥ 95%–97% |
| Theoretical Density | 7.60–7.80 kg/dm³ (varies with silicon content) |
| Surface Coating | Inorganic coating D, semi-organic thin coating A, semi-organic thick coating H, chromium-free coating K, self-bonding coating Z |
Insulation Coating Types for Non-Oriented Silicon Steel Strip
The insulation coating applied to the surface of non-oriented silicon steel strip is a critical factor determining product performance. It not only provides interlayer insulation but also affects stamping workability and heat resistance. Wuxi Zhongxin Special Steel offers multiple coating options to meet different application requirements:
- Inorganic Coating D: Good heat resistance and weldability, suitable for motor cores requiring high-temperature heat treatment or welding processes.
- Semi-Organic Thin Coating A: Improves stampability, reduces punch wear, while maintaining good weldability. The most widely used general-purpose coating.
- Semi-Organic Thick Coating H: Excellent stampability and high interlayer resistance, suitable for large motors requiring high insulation performance.
- Chromium-Free Coating K: Contains no hexavalent chromium, environmentally friendly with good weldability, compliant with RoHS and other environmental regulations.
- Self-Bonding Coating Z: Provides good post-bonding performance, high core fixing strength, suitable for high-precision lamination and automated assembly.
Advantages and Applications of Non-Oriented Silicon Steel Strip
Non-oriented silicon steel strip is a high-performance metal material specifically designed for power equipment core manufacturing. Through precision rolling and insulation coating treatment, it outperforms ordinary cold-rolled steel strips in electromagnetic properties, processing accuracy, and surface quality.
Core Advantages
- Low Iron Loss, High Magnetic Flux Density: Optimized chemical composition and rolling/annealing processes result in extremely low energy loss in alternating magnetic fields, along with high magnetic flux density, significantly improving motor efficiency and power density.
- High Lamination Factor: High surface flatness and strict thickness tolerance ensure tight, gapless core stacking, effectively reducing magnetic circuit losses and enhancing overall motor performance.
- Excellent Stamping Workability: The surface insulation coating provides good lubrication, and combined with the high-quality cold-rolled substrate, effectively reduces die wear during high-speed stamping, extends punch life, and increases stamping yield.
- High-Precision Slitting: Wuxi Zhongxin Special Steel is equipped with precision slitting lines, achieving width tolerance within ±0.10 mm and burr height ≤ 0.03 mm, meeting the stringent dimensional accuracy requirements of high-speed automated lamination lines.
- Diverse Insulation Coatings: Offering inorganic, semi-organic, chromium-free, self-bonding, and other insulation coating options. Customers can flexibly choose based on heat resistance requirements, stamping processes, and environmental standards.
- Stable Magnetic Property Batch Consistency: Supplied materials come from large domestic steel mills with stable, batch-produced non-oriented silicon steel master coils. Each batch is accompanied by a quality inspection certificate for iron loss and magnetic flux density values, ensuring reliability and traceability of product performance.
- Flexible Customization Services: Based on specific application requirements, Wuxi Zhongxin Special Steel provides customized slitting and distribution solutions for different grades, thicknesses, widths, and coating types, saving customers the equipment and labor costs of in-house slitting.
Application Areas
New Energy Vehicle Motors: For stator and rotor core manufacturing of drive motors in new energy vehicles.
- Industrial Motors: For stator and rotor cores of various industrial electric motors, pump motors, fan motors, compressor motors, etc.
- Household Appliances: For core components in air conditioner compressor motors, refrigerator compressor motors, washing machine motors, vacuum cleaner motors, fan motors, and other home appliance products.
- Small and Medium Transformers & Reactors: For core manufacturing of small and medium power transformers, welding transformers, chokes, reactors, instrument transformers, etc.
- Relays & Electromagnetic Switches: For cores and armature components of various relays, electromagnetic switches, solenoid valves, contactors, etc.
- Generators: For stator and rotor cores of small gasoline generators, diesel generators, wind turbines, and large hydroelectric generator sets.
- Power Tools: For stator and rotor cores of high-speed motors in power tools such as drills, saws, angle grinders, etc., requiring good mechanical strength and stamping performance.
- Office Equipment & Precision Instruments: For micro-motor cores in copiers, printers, scanners, and other office equipment, as well as micro-electromagnetic components in various precision instruments.
Non-Oriented Silicon Steel Strip Factory
Wuxi Zhongxin Special Steel Co., Ltd. is located in Wuxi City, Jiangsu Province. The company not only supplies high-quality non-oriented silicon steel strip but also offers one-stop services including precision slitting, custom width processing, and precision packaging, meeting the procurement needs of various motor and power equipment manufacturers.
Factory Capabilities
- Monthly Processing Capacity: Over 3,000 tons of non-oriented silicon steel master coils
- Standard Lead Time: 5–30 working days (depending on specifications and order quantity)
- Common Specifications in Stock: Mainstream grades and standard widths kept in inventory
- Processing Services: Precision slitting, width customization, re-coiling, precision packaging
- Sample Support: Samples available for trial and validation upon customer request
Quality Inspection & Traceability
- All incoming master coils are accompanied by the original mill’s Material Test Certificate (MTC)
- Full process quality control during slitting, with inspection records retained for each batch
- Products are traceable to the original master coil batch number, ensuring closed-loop quality management
Typical Grades
| Grade | Thickness | Typical Application |
| 35W270 / 35W300 / 35W440 | 0.35 mm | New energy vehicle drive motors, high-efficiency industrial motors, high-frequency transformers |
| 50W470 / 50W540 / 50W600 | 0.50 mm | Small and medium motors, compressor motors, welding transformers, relays |
| 50W800 / 50W1000 / 50W1300 | 0.50 mm | General-purpose motors, home appliance motors, power tool motors, chokes |
Non-Oriented Silicon Steel Strip Pricing
The price of non-oriented silicon steel strip varies significantly depending on factors such as substrate grade, thickness specification, iron loss class, coating type, slitting precision, and purchase quantity. Low-grade products offer a clear cost-performance advantage and are suitable for general-purpose motor applications with moderate efficiency requirements. Medium and high-grade products are more expensive due to their complex manufacturing processes and higher performance requirements. Prices for premium grades can reach 2 to 3 times that of ordinary rebar.
For a detailed quotation based on your specific requirements, please contact us with your specifications (grade, thickness, width, coating type, order quantity, etc.). We will provide professional technical support and competitive pricing! Your trusted partner for non-oriented silicon steel strip processing and distribution!