Aluminium rolled products Quality without compromise

Speira's aluminium rolled products are made from recycled metal and primary aluminium.  Large aluminium ingots are cast from the liquid metal, which we then process into aluminium rolled products such as sheets, strips, coils or plates.

Before and during hot rolling, the metal is heated to a temperature above the so-called recrystallization temperature. This method brings the metal to a state in which it is easy to form and therefore easy to roll. During subsequent cold rolling, the material is further processed into thin strips and becomes stronger through cold forming. Intermediate annealing at temperatures between 300 and 400 °C is sometimes necessary to precisely adjust the strength. If the end product is to be easily formable again, soft or condition annealing is carried out at precisely defined temperatures after rolling.

In our rolling mills, electrically operated rollers are mounted in stable stands. In duo stands, the lower roll is fixed, and the upper roll is adjustable. Quarto stands use additional back-up rolls to stabilize the work rolls with the high rolling forces of up to several 1000 tons. Reversing stands in hot rolling mills allow the material to be rolled both forwards and backwards. Together with the so-called finishing stands, they are part of hot rolling mills that can be several hundred meters long and enable a very high production capacity.

The result, wound onto a roll and cut to the required final width, is the semi-finished product that we supply to our customers. They in turn produce beverage cans, façade cladding, roller shutters, roofing, components and much more. If the aluminium rolled products are to be further refined, they are sent for surface treatment before delivery.

Surface processing of rolled aluminium

Processes such as grinding, brushing, polishing and anodizing are used to finish aluminium rolled products. Anodizing in particular, an electrochemical process, strengthens the natural oxide layer of the aluminium and thus creates a particularly robust surface. This not only provides greater protection, but also gives the material an attractive appearance.

When it comes to pre-painted aluminium rolled products, we have the highest level of expertise from over 30 years of experience. Coil coating in our production lines is a finishing process that we have mastered to perfection with our special expertise.