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Cold Rolled Grain Oriented Electrical Steel, abbreviated as CRGO, also known as oriented silicon steel or transformer silicon steel, is a highly specialized soft magnetic alloy. After special processing, its grains are highly uniformly arranged in the rolling direction, thereby obtaining ultimate magnetic properties in a specific direction. It is a high-end electrical steel material with highly directional magnetic properties It is mainly used for power transformers, distribution transformers, reactors, and iron cores of large power equipment. It is one of the core materials in modern power transmission and distribution systems.

‘Orientation’ refers to: After special processing, the steel grains are arranged uniformly in height along the rolling direction. This can make the material have:

Higher magnetic permeability

Lower iron loss

Higher energy efficiency

The main components of CRGO are:

Fe (iron): matrix
Si (silicon): 2.9% -3.5%
C (carbon): extremely low
Al, Mn, S: trace control

The function of silicon element is to increase electrical resistivity, reduce eddy current losses, and enhance magnetic properties.

CRGO classification

1. Ordinary oriented silicon steel: M4, M5, M6
2. High magnetic induction (Hi-B)
3. Laser Scribed

1. Ultra low rail loss
2. High magnetic induction intensity
3. Excellent directionality
4. Surface insulation layer

Cold rolled oriented electrical steel (CRGO) is known for its unique low loss and high magnetic permeability properties. Its main applications can be roughly divided into the following three levels:

Core application areas: power transformers, distribution transformers.

Related electrical equipment: reactors, transformers, power generators, special transformers.

Emerging and high-end applications: New energy vehicle drive motors, charging station transformers, renewable energy grid connected, high-efficiency industrial motors.

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