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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

 

Want to know more about our solutions for rear chassis? Watch this webinar to hear our experts explain why steel solutions for rear chassis enable carmakers to extend range, reduce cost, and enhance safety at the most affordable cost.

Watch the recorded version of the webinar about BEV chassis solutions

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