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S-in motion® Rear Chassis for BEVs

A catalogue of smart steel solutions

ArcelorMittal’s advanced steel solutions are ideally suited for the BEV chassis requirements. Their performance in terms of formability, durability and fatigue is unmatched. ArcelorMittal has a range of advanced high strength steels (AHSS) on offer that are suited for various forming technologies: tube forming, also called High Frequency Induction (HFI), cold stamping and progressive die stamping. These optimized steel S-in motion® solutions enable important mass savings for the rear chassis, as shown in our 2.5-tonnes SUV study – with an “Integral link” and a “Five links” solution.

 

ArcelorMittal’s optimized lightweight steel solutions are matching the various multi-link chassis requirements based on a 2.5-tonnes SUV vehicle:

  • Kinematic and Compliance

    (Adams)

  • Static stiffness

    (Abaqus)

  • Modal

    (Abaqus)

  • Buckling

    (Abaqus)

  • Stress

    (Abaqus)

  • Fatigue

    (Abaqus + nCode)

 

Two S-in motion® studies for the rear chassis:

Focus on “Integral link” rear chassis steel solution

Discover the various detailed solutions per module in our 3D car configurator

 

 

Focus on “Five-links” rear chassis steel solution

  • Subframe

  • Front upper control arm

  • Rear upper control arm

  • Toe link

  • Front lower control arm

  • Lower control arm

 

Subframe

AHSS steel grades meet the subframe requirements in term of formability, durability and fatigue

 

Rear upper control arm

The HR660Y760T-CP grade provides large geometrical possibilities for the upper control arm of the multilink chassis

  • Steel grades:
    HR660Y760T-CP
  • Forming technology:
    Progressive die stamping
  • Assembly method:
    Gaz Metal Arc Welding (GMAW)
  • Comments:
    - Mass savings can be achieved thanks to the higher mechanical properties of the HR660Y760T-CP grade
    - Double shell design with bush mount integrated

 

Front upper control arm

The HR660Y760T-CP grade provides large geometrical possibilities for the upper control arm of the multilink chassis

  • Steel grades:
    HR660Y760T-CP
  • Forming technology:
    Progressive die stamping
  • Assembly method:
    Gaz Metal Arc Welding (GMAW)
  • Comments:
    - Mass savings can be achieved thanks to the higher mechanical properties of the HR660Y760T-CP grade
    - Double shell design with bush mount integrated

 

Toe link

The HR440Y580T-FB grade provides large geometrical possibilities for the toe link of the multilink chassis

  • Steel grades:
    HR440Y580T-FB, HR420LA
  • Forming technology:
    Tube forming / High frequency induction (HFI)
  • Assembly method:
    Gaz Metal Arc Welding (GMAW)
  • Comments:
    - The HR440Y580T-FB grade is compatible with different processes e.g stamping and tube forming
    - The toe link part is made of HR440Y580T-FB tube, welded to HR420LA bushing housing

 

Front lower control arm

The HR660Y760T-CP grade provides large geometrical possibilities for the lower control arm of the multilink chassis

  • Steel grades:
    HR660Y760T-CP
  • Forming technology:
    Progressive die stamping
  • Assembly method:
    Bush mount integrated
  • Comments:
    - Mass savings can be achieved thanks to the higher mechanical properties of the HR660Y760T-CP grade
    - No welds are needed thanks to the geometric capability and the hole expansion of the HR660Y760T-CP grade

 

Lower control arm

High mass savings for the lower control arm are possible thanks to the HR660Y760T-CP grade

  • Steel grades:
    HR660Y760T-CP
  • Forming technology:
    Cold stamping
  • Assembly method:
    Bush mount integrated
  • Comments:
    - Mass savings can be achieved thanks to the higher mechanical properties of the HR660Y760T-CP grade
    - No welds are needed thanks to the geometric capability and the hole expansion of the HR660Y760T-CP grade

 

Two S-in motion® studies for the rear chassis:

Related info

 

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