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Help CenterSilicon Steel & Grain Oriented Silicon Steel，50W470、35W300、50W250，30Q130、27Q100、30Q120G
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Product Description of Silicon Steel
1. Product Overview
Silicon steel, also known as electrical steel or silicon steel sheet, is a low-carbon silicon alloy steel with a silicon content of 0.5%–4.5% and carbon content below 0.08%.It features high magnetic permeability, low coercivity, low core loss, and high electrical resistivity, serving as the core magnetic material for transformers, motors, generators, electrical instruments and other electromagnetic equipment.
2. Material & Chemical Composition
Main components: Fe (matrix), Si (1.0%–4.5%, key alloying element)
Impurity control: Extremely low contents of C (
Classification by silicon content
Low-silicon steel (0.5%–2.8%): Medium magnetic permeability, high core loss, good mechanical properties, easy stamping, for motors and small electrical appliances
Medium-silicon steel (1.5%–3.0%): High magnetic permeability, low core loss, moderate hardness, for small and medium-sized transformers and welding machines
High-silicon steel (3.0%–4.5%) Ultra-high magnetic permeability, ultra-low core loss, high hardness and brittleness, for large power transformers and high-voltage generators
3. Product Classification
3.1 Cold-Rolled Non-Oriented Silicon Steel (NO / W Type)
Grain structure: Random distribution, isotropic
Silicon content: 0.5%–3.0%
Core loss P1.5/50: 2.0–8.0 W/kg
Magnetic induction B50: 1.5–1.75 T
Applications: Motors, generators, new energy vehicle drive motors, household appliance compressors, small and medium transformers
3.2 Cold-Rolled Oriented Silicon Steel (GO / Q Type)
Grain structure: Highly oriented along rolling direction, strong anisotropy
Silicon content: 3.0%–4.5%
Core loss P1.7/50: 0.8–1.5 W/kg
Magnetic induction B8: 1.7–1.95 T
Subcategories: Conventional Grain Oriented (CGO), High Magnetic Induction Oriented (HiB)
Applications: Large power transformers, instrument transformers, reactors, new energy boost transformers
4. GB Grade Interpretation
4.1 Non-Oriented Silicon Steel (W/DW)
50W470: Thickness 0.50mm, core loss ≤4.70 W/kg
35W300: Thickness 0.35mm, core loss ≤3.00 W/kg
4.2 Oriented Silicon Steel (Q/DQ)
30Q130: Thickness 0.30mm, core loss ≤1.30 W/kg
27Q100: Thickness 0.27mm, core loss ≤1.00 W/kg
5. Regular Specifications
Thickness: 0.10, 0.15, 0.20, 0.23, 0.27, 0.30, 0.35, 0.50 mm
Surface coating: Inorganic insulating coating (C2, C3), semi-organic coating (M11), self-bonding coating
Delivery condition: Cold-rolled and annealed, coils / sheets, customizable cutting size
6. Typical Grades & Applications
Non-oriented (for motors):50W470: General motors, water pumps, fans35W300: High-efficiency motors, industrial motors50W250: New energy vehicle drive motors
Oriented (for transformers):30Q130: Distribution transformers27Q110: High-efficiency transformers30Q120G: Large power transformers
7. Product Advantages
Low core loss, greatly reducing energy consumption and temperature rise
High magnetic permeability, improving magnetic transmission efficiency
Excellent stamping performance, high lamination factor
Insulating coating, high interlayer resistance, suppressing eddy current
8. Delivery & Service
Specifications: Thickness 0.10–0.50mm, width 100–1250mm, slitting and cutting available
Lead time: 5–7 days for stock products, 15–25 days for customized sizes
Quality standard: Conforms to GB/T 2521, with material certificates and test reports
Packaging: Waterproof and moisture-proof, export-standard fumigated wooden pallets and steel frames
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