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Help CenterSilicon Steel & Silicon Steel Coil，IEC 60404、ASTM A677/A876、JIS C2552、EN 10106、EN 10107
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Silicon Steel，Grade: 50W470, 50W600, 50W800, 30Q120, 30Q130,NegotiableMOQ: 5 Metric Tons
1. Product Overview
Silicon Steel, also named Electrical Steel or Lamination Steel, is special soft magnetic alloy steel containing 1.0%~4.5% silicon element. It features high magnetic permeability, ultra-low core loss and high resistivity, which greatly reduces energy loss during electromagnetic conversion. It is the core raw material for transformer, motor, generator and new energy electronic control equipment, known as the "heart material" of power facilities.We supply two main categories: Cold Rolled Non-Oriented Silicon Steel (CRNGO) and Cold Rolled Grain-Oriented Silicon Steel (CRGO / Hi-B High Permeability GOES), together with ultra-thin high-frequency silicon steel strips. Our products comply with GB, IEC, ASTM, JIS international standards. We have stock coils, slitted strips and cut-to-size sheets available for shipment from Tianjin Port within 5-7 working days, with official English Mill Test Certificate (MTC) provided per batch.
2. Executive Standards
Domestic GB Standards
Cold rolled non-oriented electrical steel: GB/T 2521-2021
Cold rolled grain-oriented electrical steel: GB/T 2520-2021
Hot rolled silicon steel: GB/T 5212
International Standards
IEC 60404, ASTM A677/A876, JIS C2552, EN 10106, EN 10107RoHS & REACH environmental test reports can be supplied for European & American export.
3. Classification & Material Grades
3.1 Cold Rolled Non-Oriented Silicon Steel (CRNGO for Motors, Magnetic Isotropy)
Silicon content: 0.5%~3.0%, grains distributed randomly with uniform magnetic performance in all directions, perfect for rotating magnetic field equipment and easy stamping
Low grade for household micro motors: 50W800, 50W600, 50W470
Medium grade for industrial fans & compressors: 50W350, 50W310, 50W270
High grade for new energy drive motors & wind power generators: 50W180, 35W230, 35W200
Ultra-thin high-frequency NO steel: 0.20/0.25/0.30mm for variable frequency & high-frequency motors
3.2 Cold Rolled Grain-Oriented Silicon Steel (CRGO for Transformers, Superior Magnetic Performance Along Rolling Direction)
Silicon content ≥3.0%, grains aligned along rolling direction with ultra-low core loss, suitable for static alternating magnetic field transformers
Conventional CGO: 30Q130, 27Q120, 23Q110
Hi-B High Permeability GO (Energy-saving transformer priority): 30QH120, 27QH110, 23QH095
Laser Domain Refined Hi-B: Further lower core loss for EHV & large-capacity power transformers
Ultra-thin GO strips (0.15/0.18/0.20mm): Pulse transformers, welding machines, high-frequency inductors
3.3 Hot Rolled Silicon Steel (Economical Type)
0.5mm thickness, low silicon 1.0%-2.5% for small motors & low-power transformers, limited stock available.
4. Specification Parameters
4.1 Thickness
CRNGO: Standard 0.35mm, 0.50mm; Custom 0.20/0.25/0.65mm
CRGO: Standard 0.23mm, 0.27mm, 0.30mm; Ultra-thin 0.15/0.18mm for high frequency
4.2 Width
Master coil standard width: 750–1270mm; Slitted narrow strips 50–1200mm available, slit edge / mill edge optional
4.3 Coil Parameters
Standard inner diameter: 508mm; Single coil weight 3–10 tons, heavy coils customizable; Wrapped with inner paper & steel strapping
4.4 Surface Insulation Coating (Standard for Export)
T2 inorganic coating: High lamination factor, withstand stress-relief annealing up to 820℃, universal type
Chrome-free W coating: Compliant with EU REACH, eco-friendly, preferred for EU & USA shipments
H high-temperature coating: For high-temperature processing & high-frequency working conditionsCoating features strong adhesion, high interlaminar resistance, no peeling during stamping, anti-rust & insulation integrated
4.5 Dimensional Tolerance
Thickness tolerance ±0.01~0.03mm; Width tolerance 0~+5mm; Excellent flatness, stacking factor ≥97%
5. Core Product Advantages
Stable magnetic performance: Raw material from mainstream steel mills, core loss & magnetic induction tested per coil, full traceable heat number with complete MTC
Superior machinability: CRNGO with high elongation, no crack during high-speed stamping; CRGO clean shear with minimal burr
Eco & heat-resistant coating: Multiple coating options for annealing, welding & long ocean anti-rust storage
One-stop full-size supply: Master coils, slitted strips, cut-to-size sheets & semi-finished laser-cut iron cores available
Energy efficiency: High-grade silicon steel reduces no-load energy consumption of motors & transformers by 10%~30%
Seaworthy export packaging: Waterproof film + anti-rust paper + wooden pallet reinforcement, suitable for 20GP/40GP ocean containers
Fast delivery: Standard grades in stock for dispatch within 3 days; ultra-thin & special coating customized goods shipped from Tianjin Port in 5-7 days
6. Main Application Fields
CRNGO Non-Oriented Silicon Steel
New energy: EV drive motors, wind power generators, PV inverter inductors
Industrial equipment: Air compressors, water pumps, fans, servo motors, construction machinery motors
Home appliances: Air-condition compressors, refrigerator motors, fans, washing machines, small transformers
General electromagnetic parts: Relays, solenoid valves, ballasts, mini generators
CRGO Grain-Oriented Silicon Steel
Power grid: Distribution transformers, large industrial dry/oil-immersed transformers
New energy storage: Energy storage converters, EV charging pile high-frequency transformers
Special equipment: Welding machines, pulse power supplies, current transformers, reactors, magnetic switches
7. Delivery Condition
Fully processed annealed state (standard supply): Final annealing finished at factory, ready for stamping & stacking directly
Slitting service: Custom narrow strips with deburring
Cut-to-size sheet: Automatic cross-cut for square, stepped & miter iron cores
Custom coating: Chrome-free eco coating & high-temperature coating on request
8. Quality Control & Inspection
Dimension inspection: Full test on thickness, width, coil weight, flatness & burr
Magnetic performance test: Epstein frame test for core loss P1.5/50 & magnetic induction B50 with actual test data
Coating inspection: Interlaminar resistance, adhesion, heat resistance & salt spray anti-rust test
Mechanical property test: Elongation, hardness & stamping formability verification
Online surface flaw detection; English MTC issued per batch, third-party re-inspection acceptable
9. Packaging & Ocean Shipment
Coil packing: Inner VCI anti-rust film + moisture-proof kraft paper, fixed by steel strapping, solid wooden pallet at bottom to avoid damp & collision during sea transit
Slitted strips & sheets: Bundled with steel straps, separated by wooden frames, bilingual labels marked with grade, thickness, width, weight & heat number
Loading Port: Stock goods loaded within 3 days, customized products containerized in 5-7 days
Optional rain cover upgrade for long-term marine transportation
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