Detail
Schweißeignung
The weldability of EN AW 7075 is poor compared with other materials. The alloy tends to crack when processed with WIG- or MIG-welding and is also susceptible to hot cracks and other fusion welding problems. Because of these characteristics, mechanical joining methods such as bolting or riveting are usually preferred.
Detail
Zerspanbarkeit
EN AW 7075 offers excellent machinability. Due to its high hardness and strength, machining yields very good mechanical properties and clean surfaces. Carbide and coated tools are particularly suitable to improve surface finish and increase tool life. High cutting speeds and feeds can be used, and tool wear is low. These properties make the alloy well suited for precision machining applications in aerospace and automotive industries.
Detail
Schmiedbarkeit
EN AW 7075 has moderate forgeability. It is more difficult to forge than many other aluminium alloys. Typical forging temperatures range from 370°C to 480°C. A heat treatment, typically solution heat treatment, is required after forging.
Detail
Magnetisierbarkeit
Aluminium is non‑magnetic. The copper addition does not make the alloy magnetic.
Detail
Korrosionsbeständigkeit
This aluminium alloy has low corrosion resistance. In particular, the copper content can increase susceptibility to intergranular corrosion and stress‑corrosion cracking. The alloy is also vulnerable to seawater and general weathering. It should therefore be used where high strength is required and aggressive environments can be avoided or controlled.
