Silicon steel sheet, also known as silicon steel sheet, is a soft magnetic alloy of silicon and iron with very low carbon content, and its main properties are as follows:

Electromagnetic properties
High magnetic permeability: Silicon steel sheet has high magnetic permeability, which can conduct magnetism very well, making the magnetic field in transformers, motors and other electromagnetic equipment can be more effective through the silicon steel sheet to form a closed magnetic circuit, reducing the magnetic resistance and improving the efficiency of electromagnetic conversion. For example, in power transformers, high permeability silicon steel sheet can make the magnetic field more concentrated, reduce magnetic leakage, thus improving the transmission efficiency of the transformer.
Low iron loss: iron loss refers to the energy loss generated in the silicon steel sheet under the action of alternating magnetic field, mainly including hysteresis loss and eddy current loss. Silicon steel sheet can effectively reduce these two kinds of losses by reasonably controlling the silicon content and optimizing the production process. Low iron loss can make electromagnetic equipment in the operation of less heat, reducing the waste of energy, improve the energy efficiency of the equipment, reduce operating costs, especially in high-frequency application scenarios, the advantages of low iron loss is more obvious.
High Magnetic Inductance Strength: Silicon steel sheet can achieve high magnetic inductance strength under a certain magnetic field strength, which means that it can store and transmit more magnetic energy in a smaller volume and weight, helping to realize the miniaturization and high efficiency of electromagnetic equipment. For example, in some miniaturized electronic equipment motors, the use of silicon steel sheets with high magnetic susceptibility can generate a stronger magnetic field in a limited space and increase the output power of the motor.

Physical Properties
Higher hardness: compared with ordinary steel, silicon steel sheet has a certain degree of hardness, which makes it in the processing and use of the process can maintain a better shape and dimensional stability, is not easy to deformation, is conducive to ensuring the assembly precision and performance stability of electromagnetic equipment.
Higher brittleness: Silicon steel sheet has higher silicon content, which makes it brittle. During processing and handling, if it is subjected to excessive external impact or bending, it is prone to cracking or fracture, so it needs to be handled with care and proper protective measures.
Thinner thickness: In order to minimize eddy current loss, silicon steel sheets are usually made thinner, with common thicknesses such as 0.35mm and 0.5mm. Thinner thickness can effectively shorten the eddy current path, reduce eddy current loss, but also help to improve the frequency response characteristics of electromagnetic equipment.

Surface Characteristics
Good insulation: In order to further reduce the eddy current loss, there is usually an insulating coating on the surface of the silicon steel sheet. This coating can effectively block the current flow between neighboring silicon steel wafers, so that eddy currents can only be generated within each silicon steel wafer, thus greatly reducing eddy current losses.
High surface flatness: High-quality silicon steel wafer surface flatness is very high, which helps in the stacked pieces assembled into an iron core, so that the pieces of the close fit, reduce the air gap, reduce the magnetic resistance, improve the performance of the magnetic circuit. At the same time, the flat surface is also conducive to insulation treatment and subsequent processing operations during the production process.