What Are The Ingredients Of Non Oriented Silicon Steel?

The silicon, aluminum and manganese content in steel is controlled within a certain range according to regulations, and the content of carbon, sulfur, nitrogen and oxygen is as low as possible. Depending on the grade, the content requirements for these elements are also different. Aluminum increases the strength and hardness of electrical steels and reduces ductility. However, the effect of aluminum on reducing ductility is not as pronounced as silicon, and the effect is similar to silicon. Therefore, with the increase of the grade, the silicon content increases to about 3% without changing, and the aluminum content can be gradually increased to 1%. The general grade aluminum content is 0.3%~0.6%. As the grade increases, the carbon, sulfur and manganese content is further reduced. The high grade impurity content is: S<0.002%, C<0.003%, N2<0.002%, O2<0.002%, annealing does not need to be decarburized, preventing the formation of internal oxide layer and internal nitriding layer. In addition, Ti<0.005% and Zr<0.002% are required to prevent the formation of fine TiN, ZrN and TiC, which hinder grain growth.