Metal-rolling mills; rolls thereof

HS code 845530 covers the classification of metal-rolling mills and their associated rolls. These specialized machines play a crucial role in the metalworking industry, enabling the production of a wide range of metal products, from sheets and plates to bars and profiles. Metal-rolling mills are essential for transforming raw metal materials into the forms required by various downstream industries, making them a vital component of the broader manufacturing ecosystem.

The primary production technique for metal-rolling mills involves the use of two or more cylindrical rolls that rotate in opposite directions, creating a gap through which the metal is fed. As the metal passes through the rolls, it is subjected to compressive forces that reshape and reduce the thickness of the material. This process can be repeated multiple times, with adjustments made to the roll gap and speed, to achieve the desired thickness and shape of the final product.

The main inputs required for the production of metal-rolling mills include high-quality steel for the rolls, as well as various mechanical and electrical components, such as motors, gearboxes, and control systems. Additionally, the industry relies on specialized engineering and design expertise to develop and manufacture these complex machines, which must be able to withstand the significant forces and stresses involved in the metal-rolling process.

The primary outputs of the metal-rolling mill industry are the rolls themselves, which are then used in various metalworking facilities to process raw metal materials. The finished metal products, such as sheets, plates, bars, and profiles, are then consumed by a wide range of downstream industries, including 721000 Iron and steel, 722000 Manufacture of tubes, pipes, hollow profiles and related fittings, of steel, and 731000 Manufacture of metal structures and parts of structures.