Axle crossmember

Axle crossmember - RobuSal®800 and SZBS800

Salzgitter Flachstahl’s air-hardening steel grade RobuSal®800 was especially developed for the automotive industry. This grade meets customer demands for lighter construction, better operational strength and excellent crash behavior. 

Given its remarkable characteristics, RobuSal®800 meets the latest requirements for automotive materials with regard to safety and lightweight construction potential.

RobuSal®800

RobuSal®800 meets customer demands for lighter construction, better operational strength and excellent crash behavior.

Foto von einem Integralträger aus RobuSal800

With its SZBS800 and SZBS600 grades, Salzgitter Flachstahl has developed two innovative bainitic hot-rolled steels which belong to the group of complex-phase steels. These materials are predestined for use in dynamically stressed components.

Bainitic steels

Bainitic steels are predestined for use in dynamically stressed components.


Application: Axle crossmember (potential analysis)

Lightweight construction with RobuSal®800 and SZBS800 as Tailor Welded Blank using the example of the axle crossmember (potential analysis).

Idea: use tailor welded blanks with highest-strength steels in the example

  • RobuSal®800 (sheet thickness: 2.3 mm) in the weld seam area due to excellent vibration resistance properties in the welded state
  • SZBS800 (sheet thickness 2.0 mm) in the middle area due to minimal edge cracking sensitivity in highly stressed zones 

Result:

  • Weight savings of 18 percent
  • Proof of manufacturability
  • Continuous vibration test of the rear axle support successfully completed

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