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Product Description

Produced from low-carbon steel with silicon content (0.5%–4.5%) added to reduce core loss and improve magnetic permeability. Features low hysteresis loss, high magnetic flux density, excellent lamination properties, and uniform insulating coating. Available in two main types: grain-oriented (GO) for transformers and non-grain-oriented (NGO) for motors and generators. Grades: NGO (50W600, 50W800, 50W1300, 35W440, 65W1600) and GO (23Q080, 27Q100, 30Q120, 35Q135). Thickness range: 0.18mm – 0.65mm. Surface insulation coatings: C2 (semi-organic), C3 (organic), C4 (inorganic), C5 (highly insulating). Excellent punchability, low core loss, and good dimensional accuracy. Available in coils or cut sheets. Custom widths and core loss grades available upon request.

Parameter

Product Name	Electrical Steel Sheet / Silicon Steel
Type	Grain-Oriented (GO) / Non-Grain-Oriented (NGO)
Grades (NGO)	50W600, 50W800, 50W1300, 35W440, 35W550, 65W1600
Grades (GO)	23Q080, 27Q100, 30Q120, 35Q135, 30P120
Thickness	NGO: 0.35mm, 0.50mm, 0.65mm; GO: 0.23mm, 0.27mm, 0.30mm, 0.35mm
Width	600mm – 1250mm (slit or full width)
Silicon Content	0.5% – 4.5% (depending on grade)
Core Loss (W/kg) @1.5T, 50Hz	NGO 50W800: ≤4.0; GO 30Q120: ≤1.12
Magnetic Flux Density (T)	NGO (B50): ≥1.70; GO (B8): ≥1.88
Insulation Coating Type	C2 (semi-organic), C3 (organic), C4 (inorganic), C5 (highly insulating)
Lamination Factor	≥96% (for NGO), ≥97% (for GO)
Tensile Strength (MPa)	NGO: 320–450; GO: 340–380
Density (kg/dm³)	7.60 – 7.75 (depending on Si content)
Standard Compliance	IEC 60404-8, ASTM A677/A876 (NGO), ASTM A876 (GO), JIS C2552, GB/T 2521
Surface Appearance	Smooth, uniform insulating coating on both sides
Edge Condition	Slit edge or mill edge
Coil Weight	Custom, typically 3 – 10 tons per coil

Application description:

Widely used in power transformers, distribution transformers, electric motors (AC/DC), generators, inductors, and ballasts. Grain-oriented (GO) silicon steel is ideal for transformer cores where low core loss and high permeability are critical. Non-grain-oriented (NGO) silicon steel is suitable for rotating machinery such as motor and generator cores. Excellent magnetic properties and lamination efficiency ensure energy-saving performance in electrical equipment.

Production description

Steel is melted with 0.5–4.5% silicon and continuously cast into slabs. After hot rolling and pickling, the strip is cold rolled to precise thickness. For grain-oriented (GO) grades, secondary recrystallization annealing creates oriented grain structure. Non-grain-oriented (NGO) grades undergo final annealing without this step. An insulating coating (C2–C5) is then applied. Finished coils are inspected for core loss and permeability.

Shipping Packaging

Silicon steel coils/sheets are VCI-wrapped, packed on ISPM-15 pallets, steel-strapped, edge-protected, and labeled with grade, thickness, and heat number for export.

Why Choose Us?

1.Factory Strength – Direct mill with integrated melting, rolling, and annealing lines, ensuring stable magnetic properties and consistent core loss values.

2.Quality Assurance – Strict control of silicon content, core loss (P1.5/50), magnetic flux density (B50/B8); compliant with IEC, ASTM, JIS, and GB standards.

3.Certifications & Reports – Mill test certificates (MTC) provided with each shipment; third-party testing (SGS, BV) available for core loss and coating adhesion.

4.Customization & Service – Wide grade range (GO: 23Q080–35Q135; NGO: 35W440–65W1600); support for slit widths, custom coil weights, and C2–C5 coatings.

5.Export Packaging – VCI paper + moisture protection + ISPM-15 pallets; full documentation and on-time delivery worldwide.

FAQ

1. How should silicon steel be stored before use?
Store in a dry, clean warehouse with temperature 15–35°C and humidity below 70%. Avoid contact with water, oil, or corrosive gases. The insulating coating is sensitive to mechanical damage, so handle with care and keep original packaging until use.

2. Can silicon steel be cut or punched without damaging the insulation coating?
Yes, but use sharp, well-maintained dies and punches. Burrs or excessive wear can damage the edge coating and increase core loss. For high-volume punching, proper tool clearance and lubrication are recommended.

3. What is the difference between C5 and C2 insulation coatings?
C2 is a semi-organic coating for general motor applications, offering good weldability. C5 is a highly insulating, organic-rich coating for high-frequency or high-voltage applications, providing superior interlaminar resistance. Choose based on your equipment's electrical requirements.

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HONORS AND QUALIFICATIONS

The company has sufficient inventory and complete varieties and specifications. Special materials and specifications are produced according to customer requirements and exported to Asia, the Middle East, Europe and other countries and regions. We have our own quality management systems: ISO9001, ISO14000, OHSAS18001 standards.

Electromagnetic Compatibility and Low Voltage Directive Certification

ABS Classification Society Certification Certificate

Quality Management System Certification Certificate 2

IATF 16949 Quality Management System Certification Certificate

API Q1 Quality System Certification Certificate

CCS Classification Society Certification Certificate

CUSTOMER VISIT

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We understand that our customers value quality and after-sales service most. We consistently adhere to high standards and strict requirements, striving to become your preferred partner.

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Silicon Steel Sheet