Fires. Definition and calculation of coefficient of thermal expansion
The coefficient of thermal expansion is the proportion of linear or bulk expansion of a substance at a change in temperature, usually expressed as α. Its calculation method is:

α = ΔL / Lo ΔT

Where ΔL is the value of the change in length or volume of the substance, Lo is the initial length or volume of the substance, and ΔT is the amount of temperature change.

Second, the coefficient of thermal expansion of Wuhan Iron and Steel cold rolled silicon steel sheet
Wuhan Iron and Steel cold rolled silicon steel sheet is a kind of cold rolled silicon steel sheet with high efficient magnetic conduction performance, often used in electric motors, transformers and other electrical equipment. Its coefficient of thermal expansion is 6.5×10^-6/°C, which is slightly different compared with its ordinary cold rolled steel sheet. This is because of the high content of alloying elements of silicon steel sheet, the different alloying elements for the coefficient of thermal expansion of different effects.

Third, and silicon steel sheet related applications
Silicon steel sheet is one of the main materials for electric motors, transformers and other electrical equipment. Its good magnetic permeability, low loss, low noise and other characteristics, so that the silicon steel sheet has become an important material for the modern power industry. At the same time, the thermal expansion coefficient of silicon steel sheet is also one of the important factors to be considered when manufacturing electrical equipment.

In conclusion, this paper describes the coefficient of thermal expansion of WISCO cold rolled silicon steel sheet, as well as the definition and calculation method of this coefficient, and also the applications related to silicon steel sheet. Understanding this knowledge will help to better understand and apply silicon steel sheet materials.