Aluminium billets

Not all extruded profiles are required to be circular in shape! Whether it is a seamless or porthole hollow-profile, at ALUnna, we have a multitude of possibilities. Simple profiles, such as a solid profile or an angle profile, are also available. On some profiles we may have the possibility to further improve the dimensional tolerances by adding a subsequent drawing step to achieve final dimensions. In addition to round tube, shaped, square or rectangular tubes in both medium strength and high-strength alloys can be produced.

Aluminiumwerk Unna AG one of the world’s leading manufacturers of aluminium alloy tube. We produce a variety of specialist aluminium alloy products. Our core focus is the production of aluminium alloy tube and tubular profiles. These can be offered as seamless extruded or porthole extruded products. The extruded products can also be cold drawn making it possible to offer a comprehensive range of final dimensions.

With the unique extrusion process, ALUnna has the capability to produce continuous lengths of extruded profiles. Unlike the conventional extrusion process, the continuous extrusion process does not use billets. Instead, raw material is fed into the process from a coil. This process is especially useful for the production of small extrusion profiles used as spacer bars in alloys EN AW-1050A / 1350A or EN AW-3103/3003. If necessary, there is an option to apply a draw pass to the spacer bar profile using an in-line Schumag continuous drawing machine in order to achieve the final dimension and the most demanding of tolerances.

In the aluminium industry, the porthole extrusion process is the standard method for the production of extruded tubes and profiles. The process is limited to a number of aluminium alloys. However, most of the commercially available medium strength aluminium alloys such as EN AW-6060 or EN AW-6082 can be extruded by porthole extrusion.