Oriented silicon steel, also known as cold-rolled transformer steel, is an important ferrosilicon alloy used in transformer (core) manufacturing industry. The most widely used oriented silicon steel is supplied in the form of a coil, and its surface is coated with an insulating layer to generate tensile stress in the base steel strip, thus further reducing the iron loss value.

The low silicon wafer contains less than 2.8 silicon and has a certain mechanical strength. It is mainly used to manufacture motors, commonly known as motor silicon steel sheets.