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S-in motion®, the power of lightweight steel solutions

S-in motion® is a set of steel solutions developed by ArcelorMittal for carmakers who wish to create lighter, safer and more environmentally friendly vehicles. It includes a range of steel solutions that can be used to make cars lighter at the most affordable cost. ArcelorMittal's generic steel solutions include solutions for BIW, closures, chassis parts, seats, and battery packs.

S-in motion® in a few words
  • Saving weight
  • Safer cars
  • Sustainable
  • Strength
  • Steel solutions


In motion

ArcelorMittal's S-in motion® range launched in 2010 with a set of steel solutions for C-segment vehicles. Since then the range of solutions has been expanded and now covers many other types of vehicles and vehicle parts, including hybrid and electric vehicles, pick-up trucks, mid-size sedans and SUVs.

Explore our best-in class steel solutions using ArcelorMittal's 3D car configurator:



The most affordable way to save weight

The original S-in motion® C-segment Vehicle was roll-out since 2011. Many vehicles on the road today are inspired by the S-in motion®steel solutions developed by ArcelorMittal. 

  • S-in motion® solutions help carmakers design cars with the smallest carbon footprint and lowest cost.
  • S-in motion® clearly shows that ArcelorMittal already has solutions that can meet the needs of today’s carmakers.
  • Modern steel solutions are also surprisingly lightweight and flexible, offering superior stamping performance.
  • S-in motion® savings were proven through a cost-analysis of each solution.
  • Forming and assembly simulations were conducted to assess risks and prove that an S-in motion® solutions could be serially produced.
  • The most enterprising engineers are working with ArcelorMittal on the design solutions of tomorrow.


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