What is it?
Sheets are thin, flat pieces of metal formed by an industrial process. Thicknesses vary: thin sheets are called a foil or leaf, and thicker sheets are called plates. The sheet thickness is determined by a gauge size. The thinner the sheet, the larger the gauge number.
Sheet metal is often used in automobile bodies, airplane fuselages and wings, medical tables, and roofing. Some sheet metal, with high magnetic permeability, has applications in transformers and electric machines.