Definition and classification of electrical steel

Electrical steel refers to a very low carbon ferrosilicon alloy with a silicon nitrogen content of 0.5% to 4.5%. Due to different structures and uses, it is divided into non-oriented electrical steel and oriented electrical steel. Electrical steel is mainly used as the iron core of various motors, generators, compressors, electric motors and transformers. It is an indispensable raw material product in the electric power, home appliances and other industries.
The classification of electrical steel plates is roughly hot-rolled electrical steel plates. In recent years, relevant departments have forced the elimination of electrical steel plates. The most important use of cold-rolled oriented electrical steel sheets is in transformer manufacturing. High magnetic induction cold-rolled oriented electrical steel sheets are mainly used to manufacture various electromagnetic components such as transformers and chokes in the telecommunications and instrumentation industries. The most important use of cold-rolled non-oriented electrical steel sheets is in motor manufacturing. The chemical composition of cold-rolled non-oriented electrical steel sheets consists of ferrosilicon alloys with extremely low carbon content. In deformed and annealed steel plates, the grains are randomly oriented. Also called low silicon wafers, alloys have a silicon content of 1.5% to 3.0%, or a combined silicon and aluminum content of 1.8% to 4.0%. This product is usually a cold-rolled sheet or strip with a nominal thickness of 0.35 and 0.5mm. The silicon content of the low-silicon wafer is less than 2.8%. It has a certain mechanical strength and is mainly used in the manufacture of motors and generators.
The grade of cold-rolled electrical steel consists of English letters plus numbers. The letters indicate orientation or non-orientation. The first number indicates the thickness of the steel (number/100), and the following number indicates the iron loss (number/100). For example, the grades of oriented steel are 30Q120, 30Q130, 30Q140, etc., and the grades of non-oriented steel are 50W470, 50W600, etc.

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