Electrical steel industry analysis

GNEE Oriented Electrical Steel

According to different production processes, electrical steel is divided into two types: hot-rolled electrical steel and cold-rolled electrical steel. Cold-rolled sheets have uniform thickness, good surface quality, and high magnetic properties than hot-rolled sheets. Therefore, hot-rolled sheets are facing being replaced. The trend of phasing out cold-rolled sheets.
Cold-rolled electrical steel can be divided into oriented electrical steel and non-oriented electrical steel according to the internal grain orientation. The grains of grain-oriented electrical steel are basically unidirectional and have high silicon content. They are mainly used in transformer manufacturing. Non-oriented electrical steel has chaotic grain distribution and low silicon content. It is mainly used in motor manufacturing. The properties of grain-oriented electrical steel will be identified by magnetic measurements after production. If the magnetic induction is less than 1.88T, it is a universal oriented electrical steel (CGO). If the magnetic induction is greater than 1.88T, it is a high magnetic induction oriented electrical steel (HiB).

Cold Rolled Electrical Steel

The performance of grain-oriented electrical steel can be defined by indicators such as iron loss and magnetic induction, and is usually distinguished by grade. The lower the loss value of oriented electrical steel, the higher the magnetic induction and the better the performance, which can reduce the power loss of the transformer. In addition, under the same capacity, the volume and weight of the transformer core made of oriented electrical steel are reduced, and electrical steel plates, electromagnetic wires and insulation materials can be saved.
At present, my country has become the world's largest producer and consumer of electrical steel, but the proportion of grain-oriented electrical steel is still very small. In 2021, my country's total electrical steel output will reach 13.1828 million tons, of which 1.809 million tons are oriented electrical steel and 11.3819 million tons are non-oriented electrical steel.