Korean steelmaker POSCO is showcasing its latest automotive steel technology and 30 new types of futuristic car components for the first time at this year’s Detroit Motor Show (NAIAS).
POSCO’s self-developed advanced automotive steel technologies include its high tensile TWIP steel and hot press forming (HPF) steel with upgraded strength and elasticity compared to existing products.
TWIP steel is able to withstand up to 100 kilograms per square millimeter and boasts up to five times higher formability – the ability of sheet metal to be formed into a desired shape without nicking or cracking, compared to its conventional counterparts.
Due to its heightened applicability, strength and shock absorption capacity, TWIP steel can be applied to the front and back bumpers of vehicles, significantly improving safety – an industry first. Until now, many rival steel makers have been working on the material but failed to produce it commercially.
HPF steel is hard to process when it has a tensile strength higher than 1.5 GPa, which can usually withstand up to 150 kilograms per square millimeter; POSCO has however made up for this weakness. The product will be used in the center pillars, which protect passengers from external shocks in broadside collisions and rollover accidents.
Currently, POSCO is the only company in the world that has successfully created a product with a tensile strength of the world’s highest level of 2 GPa. This product was first used in Renault’s EOLAB Concept Car powered by a 1.0-liter engine, which made its debut at the Paris Motor show in 2014.
POSCO will also reveal the PosM-XF, a next-generation TWIP with improved forming ability, together with the recently developed 1 GPa TRIP steel.
According to a POSCO official, utilizing the new steel will make an automotive body 26.4 percent lighter but safer than conventional steel frames of mid-sized sedans. It has received a ‘Five-Star’ rating in European New Car Assessment Program tests and a ‘Good’ rating in the U.S.’ Insurance Institute for Highway Safety (IIHS) tests.
The new component also emits 50 percent less carbon dioxide than conventional steel frames of cars with internal combustion engines, and 9 percent less carbon dioxide than conventional steel frames of electric vehicles.
Image courtesy: Business Korea