Board is a standard sized flat rectangular building material board used in the construction industry as a component for walls, ceilings, or floors. It also refers to metal plates that are forged, rolled, or cast.
Divided into thin plate, medium plate, thick plate, extra thick plate, and usually made into standard sized flat rectangular building material plates.
Plate products have a flat appearance, a large width to thickness ratio, and a large surface area per unit volume. This characteristic of appearance brings about their usage features: (1) large surface area, strong ability to accommodate and cover, and are widely used in chemical, container, construction, metal products, metal structures, and other fields; (2) It can be cut, bent, stamped, welded, and made into various product components at will, and is flexible and convenient to use. It occupies an important position in departments such as automotive, aviation, shipbuilding, and tractor manufacturing; (3) Structural components such as steel sections, steel pipes, large I-beams, and channel steels that can be bent and welded into various complex cross-sections.

Production characteristics
(1) The sheet is rolled out by flat rollers, so changing the product specifications is relatively simple and easy, the adjustment operation is convenient, and it is easy to achieve computer control and automated production.
(2) The shape of the sheet is simple, it can be produced in rolls, and it is widely used in the national economy, so it should and can achieve high-speed continuous rolling production.
(3) Due to the large aspect ratio and surface area, the rolling pressure in production is very high, reaching tens of millions of newtons. Therefore, the rolling mill equipment is complex and huge, and the control of product width, thickness, dimensional accuracy, plate shape, and surface quality has become very difficult and complex.