South Korean steelmaker Posco is to supply light-weight magnesium sheets to Porsche for use in the roof of the German car company's new 911 GT3 RS high-performance sportscar - unveiled at this month's Geneva Motor Show.

Posco said it is the first time magnesium will be used for limited volumes of body parts.

However, it expects automotive demand for the material to grow rapidly as vehicle manufacturers continue to look for light-weighting solutions.