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.
Jim Keller, 2014 Acura MDX Chief Engineer
The new Honda Acura door ring received the highest available safety ratings and awards including:
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)