Silicon Steel Sheet Iron Coil

Our Silicon Steel Sheets & Coils are high-quality iron-silicon alloys (0.5–4.5% Si) optimized for energy efficiency and superior magnetic performance. We offer both Cold-Rolled Non-Grain Oriented (CRNGO) and Grain-Oriented (CRGO) variants used in transformers, motors, inductors, and a wide range of electrical applications 

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Product Introduction

Our Silicon Steel Sheets & Coils are high-quality iron-silicon alloys (0.5–4.5% Si) optimized for energy efficiency and superior magnetic performance. We offer both Cold-Rolled Non-Grain Oriented (CRNGO) and Grain-Oriented (CRGO) variants used in transformers, motors, inductors, and a wide range of electrical applications 


Technical Specifications & Grades

Type Grade Core Loss (W/kg @1.5 T, 50 Hz) Thickness
CRNGO 50W800 ≤5.8 ~0.50 mm
CRNGO 50W600 ≤4.2 ~0.35 mm
CRGO 30Q130 ≤1.3 ~0.30 mm
  • Silicon Content: 2.9–3.5% (CRNGO), 2.8–3.2% (CRGO)

  • Extremely Low Carbon after decarburization (≤0.005%)

  • Insulations: C5 or C6 coatings (3–6 µm, ≥20 Ω·cm²) to reduce eddy currents 


 Key Advantages

  • Low Iron Loss: Core losses as low as 1.2 W/kg at 1.5 T; CRNGO offers 40% less hysteresis vs. traditional steel 

  • High Magnetic Permeability: μₘₐₓ of 1,500–2,000, enabling fast magnetic flux alignment

  • Smooth Surface Finish: Ra ≤0.8 µm, minimizing air gaps and boosting magnetic efficiency

  • Wide Standards Compliance: Meets ASTM A683, IEC 60404-8, JIS C 2553 requirements


Key Applications

  • Energy Distribution: Transformer cores (30Q130, 50W600, 50W800) with >98% efficiency

  • E‑Mobility: CRNGO steels (0.35 mm) cut eddy current losses by ~25% in EV motors

  • High-Frequency Electronics: Thin CRGO laminations for inductors running at 100–500 kHz

  • Motors & Generators: CRNGO grades deliver consistent performance in rotating machinery


Manufacturing & Quality Assurance

  • Production Process: High-temperature hot rolling → precision cold rolling (85–93% reduction) → decarburization annealing (~820°C in H₂/N₂)

  • Testing Standards: Core loss (Epstein frame, IEC 60404-2), coating adhesion (ISO 2409 Grade 0), tight dimensional tolerances


Why Choose Our Silicon Steel?

  1. Energy Efficient – Low losses and high permeability enhance system performance

  2. Versatile Range – Choose from CRNGO and CRGO grades based on your application

  3. Custom Sizes – Coils up to 1,250 mm wide, lengths to order; thickness from 0.10–0.50 mm

  4. Quality Inspections – Each batch verified for core loss, coating adhesion, and magnetic durability

  5. Global Ready – Certifications and specifications tailored to international markets


📞 Engage with Us for Expert Solutions

Tell us your application—transformer, motor, or inductor—and we’ll match you with:

  • The best grade and lamination thickness

  • Technical datasheets and magnetic performance profiles

  • Custom samples and factory quotes

  • Fast global shipping options

👉 Contact us today to boost efficiency and precision with our premium silicon steel solutions.

Luo Kaiwei Steel Company is a multi-ISO certified steel manufacturer specializing in carbon steel plates, pipes and galvanized coils since 2010. Competitive prices and ASTM/JIS compliant. Get instant quotes for bulk orders and global shipping support.

Tel: +86 15635685959

E-mail: [email protected]  

WhatsApp: +86 18912200505

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