If you want to buy sheet aluminium with good quality and low price, here you can find your reliable supplier. When it comes to aluminium sheet, the first thing we should think of is the cold rolling process. The rolling process below the recrystallization temperature of metals and alloys is called cold rolling. During cold rolling, although the temperature of the rolled piece can be increased due to the heat of metal deformation and frictional heat, it has a certain recovery effect, but the main role in the cold rolling process is cold work hardening (work hardening).
Compared with hot rolling, the main feature of buy sheet aluminium cold rolling is that thinner aluminium sheet and strips can be obtained. The thickness of the hot-rolled slab is usually 6-8mm. The minimum thickness is 2.5mm-3.0mm. Due to the large temperature drop of the rolled piece during the hot rolling process, it is difficult to make the hot rolling continue rolling to a thinner thickness, while cold rolling can easily make the rolled piece continue to become thinner. Generally, cold rolling mills can roll aluminium sheet to 0.5-4.5mm, and more advanced cold rolling mills can roll out ultra-thin or thick aluminium foils with a thickness of 0.1mm-0.2mm. Compared with hot rolling, the main characteristics of cold rolling are that cold rolling can produce products with precise dimensions, uniform thickness, good flatness and surface gloss, good product structure and high surface quality.
So many customers buy sheet aluminium cold rolled, because cold rolling mills have higher precision than hot rolling mills, the comprehensive automatic control level of cold rolling mills is higher. For example, more advanced cold rolling mills are equipped with automatic control devices for thickness and shape. In addition, cold rolling can roll high-quality and mirror finished aluminum sheet by using rolls with higher finish.