Aluminum sheet is a flat-section steel with a large ratio of width to thickness. The so-called plate usually refers to the product that is cut into fixed lengths. According to different thicknesses, aluminum plates can be roughly divided into three categories: medium and thick plates, thin plates and foils. It is generally believed that plates with a thickness of 0.2 mm to 4.0 mm belong to a class of thin plates; those with a thickness of more than 4.0 mm are classified as medium-thick plates; and those with a thickness of less than 0.2 mm are generally counted as foils, and 2 mm aluminum plates are also common. sheet.
Sheets with a thickness of 0.2 to 4 mm are supplied in single sheets. The production methods are mainly divided into two categories: hot rolling and cold rolling. Modern hot tandem mills produce strips with a minimum thickness of 1.2mm. Hot rolling in stack rolling can produce stack sheets with a minimum thickness of 0.28mm. Sheets produced by modern cold rolling mills are thinner (under 0.2mm) and have tighter dimensional tolerances.