My space

Honda Acura MDX door ring

Honda’s challenge was to replace a conventional, multi-piece spot-welded door ring with a single-piece laser-welded design. Their goal was to protect passengers, while optimizing weight, cost, and safety of the door ring.

Working with Honda R&D Americas, engineers from ArcelorMittal and ArcelorMittal Tailored Blanks developed a single-piece, hot-stamped door ring using Usibor® 1500. This advanced high strength steel enabled Honda to reduce the weight of each door by 3.9 kilograms (6.6 pounds) and increased the vehicle’s fuel economy. The redesigned door offers improved energy management through uninterrupted joints for a smooth load path.


“The entire structure around the doors are made with this super strong high-strength steel. To our knowledge, we are the first and only people that apply hot stamping in this way. [Despite it] being a much stronger, safer car, it is 275 pounds (125 kilograms) lighter than the outline car.”

Jim Keller, 2014 Acura MDX Chief Engineer


The new Honda Acura door ring received the highest available safety ratings and awards including:

  • IIHS Top Safety Pick+, including a top rating for the new small overlap crash test
  • 5-Star Overall Vehicle Score by the National Highway Traffic Safety Administration (NHTSA)
  • 2015 PACE Award (Automotive News)
  • © Honda

  • © ArcelorMittal      

The single-piece door ring was made with Usibor® 1500, one of the latest advanced high strength steels from ArcelorMittal


Crash test of the Honda Acura MDX door ring (right) shows significantly less deformation than the comparison vehicle (left)

You may also be interested in

By strength

0MPa 2000MPa
0MPa 2000MPa

By product reference



700 500 MPa 2000 MPa

Tailor your ArcelorMittal Automotive web experience

I am ...

I am especially interested in information about automotive steel for…

My ArcelorMittal Automotive space

This is your personal space on ArcelorMittal's global automotive website. You can keep your favorite ArcelorMittal automotive web pages and documents in a safe place

My space

Configure this website

If you want, you can tailor your web experience on this automotive website to your personal needs. By selecting your job profile and/or region (both optional) you enable us to personalize the content you see on this website.
No matter which job profile or region you select, you will always have unlimited access to all the information on this website. The only thing that changes is that you will be offered more tailored content. As well as your profile and region, we also use your browsing history on this website to remember your personal preferences and identify the most appropriate content for you.
We are confident that this will help you to find the inspiration you are looking for on the ArcelorMittal automotive website.