Spacer bars

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.

The purchase of Aluminium alloy billet is an option available to our customers from our on-site Cast house. The billets are cast by conventional direct chill semi-continuous casting using float-dip tube technology. The subsequent homogenisation takes place in one of our two homogenising ovens. We are able to offer short lead times for machined billet in smaller quantities than would otherwise be available. With the wide range of alloys and dimensions we can offer, we will surely find a solution for you.

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.

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.