CHICAGO ArcelorMittal SA unveiled car door solutions June 25 that are 27 percent lighter and significantly cheaper to make without compromising safety and structural requirements.
The weight reductions were achieved using advanced high-strength steel and ultra-high-strength steel and existing processing technology.
The Luxembourg-based steelmakers research and development team has also identified additional solutions that will reduce weight by up to 34 percent compared with existing parts in order to meet tailpipe emission regulations taking effect in Europe in 2015 and U.S. tailpipe emissions and fuel economy rules taking effect in 2021.
"With even tougher standards being considered through 2025 in both regions, every part of the vehicle is being studied to determine where weight can be reduced," Brian Aranha, vice president of global automotive at Luxembourg-based ArcelorMittal, said. "We are working with all the major (original equipment manufacturers) to integrate these new solutions into the design of future cars."
A 34-percent reduction in steel weight will provide a total door weight of about 26.4 pounds. Reducing vehicle weight by roughly 26 pounds allows a 1-gram reduction in carbon dioxide-equivalent emissions per kilometer.
"By applying present solutions, a car door can be 30 percent less expensive than an aluminum door," global research and development vice president Greg Ludkovsky added.
ArcelorMittal is also developing new steel grades that will be ready for production vehicles by 2017.