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Jun 30.17 Magnesium+Giga Steel: Lightweight Formula for Eco-Friendly Car
Posco, South Korea’s leading steel producer, was a player in the manufacturing of Eolab, Renault’s plug-in hybrid eco-friendly concept, with its ultra-high tensile strength “giga steel” and magnesium elements.
Giga steel refers to steel with ultra-high-tensile strength of more than a gigapascal. It can withstand over 100 kilograms per square millimeter, while a 10-by-15-centimeter giga steel plate can withstand 1,500 mid-sized cars that weigh about a ton each.

Mainly used for automotive steel plates, car frames and other auto parts, Posco’s giga steel, along with magnesium, was used to make the a-pillar of the Renault Eolab, bringing the overall weight of the car down by 130 kilograms and allowing the vehicle to reach a fuel efficiency of 100 kilometers per liter.
The Eolab’s multi-material body design combines steel, aluminum and a magnesium roof that weighs just 4.5 kg. An overall lighter weight for the Eolab incorporates subsystems (engines, batteries, brakes, etc.) that can be made smaller, and the cost savings achieved by downsizing those mechanical subsystems can be used to finance high-performance materials like magnesium with no increase in total cost.

Posco was recently named the world’s most competitive steelmaker for the eighth consecutive year, the company said, with the company poised to take over the global steel industry thanks to giga steel, its self-developed premium product. Currently Posco can mass-produce eight types of giga steel.

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