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Help CenterSilicon Steel & Electrical Steel，50WW800、50WW600、50WW470、35WW300、30WW230、30Q120、30Q130、27Q110、23Q090、M270、M300
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1. Product Overview
Silicon steel, also named electrical steel or silicon steel lamination, is special soft magnetic alloy steel with silicon element added, carbon content below 0.08% and silicon content from 1.0% to 4.5%. It features low core loss, high magnetic permeability, low coercivity and high resistivity, which is the core raw material for iron cores of motors, transformers, generators and new energy electronic control equipment.
We supply two main types: cold rolled non-oriented silicon steel and cold rolled grain-oriented silicon steel, available in coils, cut-to-length sheets, slit strips and stamped semi-finished laminations. Sufficient spot stock is ready, delivery cycle: 5-7 days, shipped from Tianjin Port, widely exported to Southeast Asia, Central Asia, Europe and Middle East for power, new energy, home appliance and industrial motor industries.
2. Product Classification, Process & Characteristics
2.1 Cold Rolled Non-Oriented Silicon Steel (For Motors)
Standard: GB/T 2521-2021, IEC 60404
Silicon content: 1.5%~3.0%, randomly distributed grains with balanced magnetic performance in all directions, suitable for rotating magnetic field.
Standard thickness: 0.35mm, 0.50mm; ultra-thin new energy grades: 0.20/0.27/0.30mm
Standard width: 1000mm, 1200mm, 1250mm, custom slitting width available
Surface: Uniform insulating phosphate coating for interlayer isolation and anti-peeling during stamping
Advantages: Excellent stamping performance, tiny burrs, high lamination factor and good mechanical toughness, compatible with high-speed automatic stamping lines
Main grades: 50WW800, 50WW600, 50WW470, 35WW300, 30WW230
Applications: Household appliance motors, industrial water pump & fan motors, new energy vehicle drive motors, wind power generators, power tools, servo motors and small reactors
2.2 Cold Rolled Grain-Oriented Silicon Steel (For Transformers)
Standard: GB/T 2521-2021, ASTM A876
Silicon content ≥3.0%, grains aligned along rolling direction. Core loss along rolling direction is only 1/3 of transverse direction, with ultra-high magnetic flux density and low loss.
Standard thickness: 0.23mm, 0.27mm, 0.30mm, 0.35mm
Two subcategories: Conventional Grain Oriented (CGO), High-B Flux Hi-B (laser domain refined for extra low loss)
Main grades: 30Q120, 30Q130, 27Q110, 23Q090, M270, M300
Advantages: Energy-saving, low noise, stable magnetic performance without attenuation during long-term operation, reduce transformer volume and weight
Applications: Power distribution transformers, dry-type transformers, high voltage main transformers, current/voltage transformers, inverters, charging pile reactors and intermediate frequency power supplies
2.3 Hot Rolled Silicon Steel (Economical Grade)
Thickness 0.35~0.50mm, low cost with relatively high core loss, only used for small low-voltage old transformers and simple electromagnetic components with limited spot supply.
3. Core Specification Parameters
3.1 Thickness Series
Non-oriented: 0.20, 0.27, 0.30, 0.35, 0.50mmGrain-oriented: 0.23, 0.27, 0.30, 0.35mmThickness tolerance within ±0.02mm, flat surface free of warpage, scratches and oxide scale.
3.2 Width & Delivery Forms
Steel Coils: Original width 1000/1200/1250mm, inner diameter 508mm; slittable narrow strips from 50mm to 1200mm
Cut-to-length Sheets: Custom length from 500mm to 2000mm
Semi-finished Laminations: Custom EI-type, rectangular, toroidal stamped cores
3.3 Key Electromagnetic Indicators
Core Loss: Core grading standard; lower value means less energy consumption and heat generation
Magnetic Flux Density (B): Higher value allows smaller iron core size under equal power
Lamination Factor: ≥96%, uniform and non-peeling insulating coating
Resistivity: 47~82μΩ·cm, effectively restrain eddy current loss
4. Main Grades, Performance & Matching Applications
Non-Oriented Silicon Steel
50WW800/600: Mid-low general grade for fans, water pumps, household air conditioner compressors
50WW470/35WW300: High-efficiency IE2/IE3 industrial motors, variable frequency home appliances
30WW230 / 0.20mm ultra-thin series: New energy vehicle drive motors, high-speed wind power, high-frequency servo motors
Grain-Oriented Silicon Steel
30Q130/M300: Medium & small distribution transformers, control transformers
27Q110/30Q120: Dry-type transformers, charging piles, photovoltaic inverters
23Q090 Hi-B high flux grade: Grid high voltage main transformers, large power transformers
5. Domestic & International Executive Standards
National Standard: GB/T 2521-2021International Equivalent: IEC 60404, ASTM A876, JIS G2552, EN 10106Mill test certificate and magnetic performance test report are delivered with goods; third-party SGS electromagnetic re-inspection is acceptable.
6. Core Product Advantages
Ultra-low core loss greatly reduces energy consumption of motors and transformers, meeting global energy-saving & carbon neutrality requirements;
Anti-aging stable magnetic performance, no magnetic attenuation under long-term power frequency & variable frequency operation to extend equipment service life;
Flat surface with uniform coating, no burr or coating peeling during high-speed stamping, suitable for automatic mass production;
Full specification coverage, one-stop supply of non-oriented, grain-oriented and ultra-thin new energy exclusive grades;
Strict dimensional tolerance control for slitting & cutting to improve iron core lamination efficiency;
Stable delivery with ten-thousand-ton spot inventory, goods delivered within 5-7 days and loaded into 20GP/40HQ containers at Tianjin Port;
Professional export packaging, waterproof & moisture-proof & anti-collision, free of rust during long sea transportation.
7. Industrial Application Scope
New Energy Industry: NEV drive motors, on-board inverters, wind power generators, photovoltaic inverters, energy storage charging pile reactors;
Power Grid: High voltage main transformers, distribution dry-type transformers, box substations, current/voltage transformers, power reactors;
Industrial Equipment: 3-phase high-efficiency asynchronous motors, water pumps, air compressors, reducers, servo/stepping motors, power tools;
Household Appliances: Compressor & drive motors for air conditioners, refrigerators, washing machines and fans;
Electronic Control: Switch power supplies, intermediate frequency equipment, relays, solenoid valves, small isolation transformers.
8. Packaging, Logistics & Commercial Terms
Packaging: Steel coils wrapped with inner waterproof oil paper and outer plastic film, fastened by steel strips, separated by solid wood pallets for moisture-proof; cut sheets packed on wood frames with edge protection;
Loading Port: Tianjin Port, FOB / CFR / CIF trade terms available;
Lead Time: 5-7 days for regular spot goods; 10-15 days for special ultra-thin grades & custom stamped laminations;
Payment Term: 30% TT advance payment, balance settled before shipment, L/C is not accepted;
Quality Warranty: Guaranteed material and magnetic performance. Free return & replacement for unqualified core loss, surface peeling or dimensional defects, full set of inspection documents delivered together with goods.
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