Grain Oriented Silicon Steel Coil

Grain Oriented Silicon Steel Coil represents a premium cold-rolled electrical steel product. Manufacturers process this material to develop a specific grain structure oriented in the rolling direction.

Product Parameters

Thickness ：0.23mm to 0.35mm for standard grades . （We also supply ultra-thin 0.18mm and 0.20mm options for high-efficiency applications .）

Width ： 900mm to 1200mm, with slitting available for custom sizes .

Coil inner diameter measures 508mm or 610mm . Coil weight ranges from 2 to 6 tons per unit .

Manufacturing process ：cold rolling followed by high-temperature annealing.

Standards ： GB, AISI, ASTM, DIN, BS, and JIS specifications .

We pack coils for secure sea shipment with waterproof wrapping. Steel strapping secures the package on wooden pallets .

Surface treatment includes a semi-organic insulating coating. This coating provides inter-laminar resistance for core applications . It withstands stress-relief annealing temperatures. The coating appears uniform gray with excellent adhesion properties.

Oriented Silicon Steel vs. Non-Oriented Silicon Steel

Microstructure:
Oriented silicon steel features a controlled grain structure where crystals align in the rolling direction. Non-oriented silicon steel has a random grain distribution, providing uniform magnetic properties in all directions.

Magnetic Properties:
Oriented silicon steel offers high permeability and low core loss along the rolling direction, with magnetic flux density reaching up to 1.88T. Non-oriented silicon steel is isotropic, offering moderate permeability with relatively higher core loss around 1.65T.

Primary Applications:
Oriented silicon steel is ideal for static equipment such as transformer cores and large generators. Non-oriented silicon steel suits rotating equipment including motors, small generators, and compressors.

Silicon Content:
Oriented silicon steel contains higher silicon levels, typically above 3.0%. Non-oriented silicon steel features a wider silicon range from 0.5% to 3.0% depending on the grade.

Common Thicknesses:
Oriented silicon steel is produced in thinner gauges ranging from 0.23mm to 0.35mm. Non-oriented silicon steel comes in slightly thicker dimensions from 0.35mm to 0.65mm.

Product Applications

Grain Oriented Silicon Steel Coil serves as the core material for power transformers. It works effectively in distribution transformers and large generator step-up units . The material suits reactors, mutual inductors, and magnetic amplifiers .

We supply this steel for ultra-high voltage transmission projects. Applications include UHV transformers and three-dimensional wound-core designs . The material supports energy-efficient transformers meeting stringent standards .

Additional uses include specialty transformers for railways and renewable energy systems. The product enables compact core designs with reduced physical dimensions. This grain oriented silicon steel remains essential for modern electrical infrastructure.