Part spectrum
Description
The Audi A6 clearly show the trend toward higher and higher material strength and toward a growing diversity of materials. Hang-on parts such as the front fender and hood are aluminum and stainless (H 400) is used for some complicated structural parts.Structural parts
Structural parts are, with very few exceptions, constructed in steel. Since the problems of joining technology and elctrical inuslation (corrosion/insulation rating) seem to be solved, there is increased use of some aluminum and stainless parts for reasons of both weight and strength properties.
The weight advantages of complete aluminum structures have been significantly marginalized by the introduction of new high-strength steels. The high cost for material and the extensive processing of aluminum can only be justified economically in the luxury car sector (Audi A8/Jaguar XJ).
Hang-on parts/outer skin
In the case of the outer skin - unlike structural parts - the vehicle design and vehicle weight are the relevant considerations for the choice of materials. Thus, for the outer skin - in contrast to structural parts of the passenger compartment - wide use is made of easily formable steels and, increasingly, aluminum and plastics.
The improved process reliability and the development of high-strength and easily formed materials will lead to improved strength characteristics in the outer skin.
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