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Aluminum coil price and manufacturing process

July 6, 2020

Aluminum coil price depends on specification of the coil, delivery rate and your purchase time, each of which can be elaborated on by a lengthy article. To make it easier, we assume that you are asking about FOB price for aluminium coil rolls.

The price of aluminium coil first relates to alloy of the coil, including 1xxx series (1050, 1060, 1070, 1100, 1200, 1235), 2xxx series (2024, 2a04, 2104), 3xxx series (3003, 3004, 3005, 3104, 3105), 5xxx series (5005, 5052, 5083, 5754, 5457), 6xxx series (6061, 6082, 6063) and 7xxx series (7075, 7005, 7050, 7a04, 7a09) etc. If you want mill finish aluminum coil rolls, 1xxx grades are the cheapest, 3xxx and 5xxx grades more expensive, and 2xxx, 6xxx and 7xxx the dearest. Each of the two gaps might be hundreds of dollars. Surface treatment influences aluminium coil price a lot, too. Regular surface treatment methods include mill finish, color coating, polishing, embossing and anodizing. The latter four is carried out based on the mill finish process, and they entail extra costs, thus relative aluminum coil roll products are more expensive than mill finish ones of the same grades.

aluminium coil manufacturing process

Aluminium coil manufacturing process affects price of a coil, too. The manufacturing process of aluminium coil consists of aluminum ingot melting and rolling. Rolling is a pressure processing method of passing the metal billet through a pair of rotating rolls (various shapes), due to the compression of the rolls, the cross-section of the material is reduced, and the length of an aluminium sheet and coil is increased. Rolled parts are pulled between the rotating rollers by friction, and are compressed to undergo plastic deformation. Through rolling, the aluminum roll has a certain size, shape and performance. The rolling process for aluminium coil manufacturing falls on two types: hot rolling and cold rolling. Hot rolling is relative to cold rolling, which is rolling below the recrystallization temperature, and hot rolling is rolling above the recrystallization temperature. Hot rolling can improve the processing performance of metals and alloys, that is, the coarse grains in the cast state will be broken, significant cracks will heal, reduce or eliminate casting defects, transform the as-cast structure into a deformed structure, and improve the processing performance of the alloy. A hot rolled aluminum plate coil has high plasticity and low deformation resistance. As for price, a hot rolled aluminium coil is a lot more higher than cold rolled rolls.

In addition to grades, surface treatment and aluminium coil manufacturing process, thickness of a coil influences price, too. Aluminium rolls thinner than 0.2mm, also known as aluminium foil jumbo rolls, are more expensive than those above 0.2mm thick, for they go through more rolling process to obtain such a small thickness.

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