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Help CenterSilicon Steel，Standard Width: 1000mm, 1200mm, 1250mm; Custom Slitting Width Available
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Silicon Steel，Grade: 50W470, 50W600, 50W800, 30Q120, 30Q130,NegotiableMOQ: 5 Metric Tons -
Silicon Steel， Grade: 50W470, 50W600, 50W800, 30Q120, 30Q130,NegotiableMOQ: 5 Metric Tons
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1. Product Overview
Silicon steel, also named electrical steel, is a special soft magnetic alloy steel with silicon content of 0.5%-4.5% and ultra-low carbon content ≤0.08%. It is a core raw material for electrical equipment, featured with low core loss, high magnetic permeability and high magnetic induction intensity.
It can effectively reduce eddy current loss and hysteresis loss under alternating magnetic field, lower equipment heating and improve electric energy conversion efficiency. Cold rolled silicon steel is the mainstream product in current market, replacing outdated hot rolled silicon steel gradually, with smooth surface, high dimensional accuracy and uniform insulating coating.
2. Product Classification
2.1 Classified by Grain Structure & Application
Non-oriented Silicon Steel
With randomly arranged internal grains, it presents uniform magnetic performance in all directions. It is suitable for rotating alternating magnetic field equipment, mainly used for motor and generator iron cores.
• Common thickness: 0.35mm, 0.5mm
• Advantages: Excellent stamping performance, suitable for high-speed automatic stamping, cost-effective
• Application scenario: All kinds of rotating motors
Grain-oriented Silicon Steel (Including Conventional & Hi-B High Magnetic Induction Type)
Internal grains are arranged neatly along the rolling direction, owning excellent unidirectional magnetic conductivity along rolling direction. It is specially applied for static voltage transformation equipment.
• Conventional grain-oriented silicon steel: For distribution transformers, mutual inductors and reactors
• Hi-B high magnetic induction silicon steel: Lower core loss and stronger magnetic induction, used for national grid high-voltage transformers, energy-saving dry-type transformers and large power transformation equipment
• Common thickness: 0.23mm, 0.27mm, 0.30mm
2.2 Classified by Surface Insulating Coating
1. Type A Ordinary Organic Coating: Strong adhesion, standard insulation performance, low cost, for medium and small motors & transformers
2. Type B High-temperature Resistant Coating: High temperature resistance, corrosion resistance and high stacking factor, suitable for new energy motors and high-temperature working conditions
3. Non-coating Silicon Steel: Without surface insulation layer, for deep processing factories with self-spraying insulation paint
2.3 Classified by Production Process
Cold rolled non-oriented silicon steel, cold rolled grain-oriented silicon steel, hot rolled silicon steel (phased out, only for old equipment maintenance)
3. Main Steel Grades
Non-oriented Silicon Steel
• High-efficiency low loss grade: 35WW300, 35WW350 (New energy vehicle motors, high-efficiency energy-saving motors)
• Medium loss general grade: 50WW470, 50WW600 (Industrial fans, water pumps, air compressor motors)
• Economical grade: 50WW800, 50WW1300 (Household motors, small micro motors)
Grain-oriented Silicon Steel
• Conventional oriented grade: 30Q120, 30Q130
• Hi-B high magnetic induction oriented grade: 27Q110, 23Q090
4. Technical Specifications
1. Standard Thickness: 0.23mm, 0.27mm, 0.30mm, 0.35mm, 0.50mm
2. Standard Width: 1000mm, 1200mm, 1250mm; custom slitting width available
3. Product Forms: Steel coil, cut-to-size sheet, slitted strip, stamping iron core lamination
4. Core Performance Indicators
• Core loss (P): The lower the value, the lower power consumption and less heat generation
• Magnetic induction intensity (B): The higher the value, the smaller iron core volume under same power
• Stacking factor: ≥95%, ensuring tight stacking and reducing magnetic gap loss
5. Executive Standard: GB/T 2521-2021, IEC International Electrical Standard
6. Dimensional Tolerance: Thickness tolerance ±0.02mm, flat surface without warping, scratch and oxide scale
5. Product Advantages
1. Ultra-low core loss, remarkable energy-saving effect, meeting global carbon neutrality requirements
2. Stable magnetic performance, high excitation efficiency, reducing overall volume and weight of electrical equipment
3. Good stamping performance, smooth steel surface with tiny burrs, compatible with high-speed automatic stamping production line
4. Uniform surface insulation coating, effectively isolating eddy current between stacked steel sheets
5. High dimensional accuracy, precise size after cutting and slitting, suitable for precision iron core processing
6. Stable magnetic aging performance, no magnetic attenuation during long-term operation
6. Application Scope
Non-oriented Silicon Steel (For Motors)
Household appliance motors: Fan, air conditioner, refrigerator and washing machine motors
Industrial motors: Water pump, fan, air compressor and reducer motors
New energy industry: New energy vehicle drive motors, wind power generators, charging pile motors
Mini electrical equipment: Solenoid valves, micro motors, power tool iron cores
Grain-oriented Silicon Steel (For Transformers)
Power grid equipment: High-voltage main transformers, distribution transformers, dry-type transformers, box substations
Electrical components: Current transformers, voltage transformers, reactors, filter inductors
Industrial power equipment: Large industrial transformers, rail transit power transformation equipment, energy storage power supply equipment
7. Deep Processing & Packing
Deep Processing Service
Coil cutting, flatting, longitudinal slitting, fixed-size shearing, iron core stamping, deburring and film laminating
Packing Standard
Double-layer moisture-proof and rust-proof packaging for steel coils, with outer steel guard plate; waterproof paper + plastic film wrapped inside. Cut steel sheets are packed with moisture-proof wooden cases to avoid scratch and moisture rust during sea and land transportation.
Attached Documents
Mill test certificate, magnetic performance test report, core loss inspection data sheet, supporting third-party re-inspection.
8. Purchase Tips
1. Non-oriented silicon steel for rotating motors, grain-oriented silicon steel for static transformers, cannot be mixed used
2. Choose grades with lower core loss for high-efficiency energy-saving electrical equipment
3. Select silicon steel with complete surface coating for high-speed stamping production
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