Metal-rolling mills; cold

hs code 845522 covers metal-rolling mills used for cold-working of metals. This industry plays a crucial role in the manufacturing sector, as it transforms raw metal materials into semi-finished or finished products that are essential for a wide range of industries, including construction, automotive, and machinery. The metal-rolling mills industry is a key component of the broader metal fabrication and processing sector, contributing significantly to the overall economic output.

The primary production technique used in the metal-rolling mills industry is cold rolling. This process involves passing metal, such as steel or aluminum, through a series of rollers under high pressure to reduce the thickness and improve the surface finish of the material. The metal is fed into the rolling mill, where it is compressed and elongated, resulting in a thinner, more uniform product. This process can be repeated multiple times to achieve the desired thickness and properties.

The main inputs required for the metal-rolling mills industry include raw metal materials, such as 720810 hot-rolled steel coils, 760110 aluminum ingots, and 722511 stainless steel bars. Additionally, the industry relies on specialized machinery, such as rolling mills, annealing furnaces, and cutting equipment, as well as energy sources like electricity and natural gas to power the production process.

The primary outputs of the metal-rolling mills industry are 720810 hot-rolled steel coils, 720839 other flat-rolled products of iron or non-alloy steel, and 760410 aluminum bars, rods and profiles. These semi-finished metal products are then consumed by a variety of downstream industries, such as 731100 structures and parts of structures, 870321 motor vehicles for the transport of persons, and 842199 parts of machinery.