The announcement highlights the importance of the auto sector to several economies in the region, as well as to several leading auto groups in Europe and Asia.
"Eastern Europe is still a growth area for us," Robrecht Himpe, CEO of ArcelorMittal's Flat Carbon Europe unit told AFP.
"ArcelorMittal has invested 10 million euros (USD 13.6 million) in a third production facility at our site in Senica, western Slovakia, to better serve our automotive clients who have moved production to eastern Europe," the company said in a press release.
This technology of preparing sheets with multiple properties before delivery to car plants reduces production costs, saves weight and therefore reduces fuel consumption.
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The new facility will employ 55 new people by 2014, it added. ArcelorMittal's Slovak unit already employs about 200 people in Senica.
The plant will supply mostly the PSA Peugeot Citroen group of France and Germany's Volkswagen which have huge production sites in Slovakia, as well as car manufacturers in neighbouring countries.
Slovakia, the world's leading per-capita car producer, posted a record output of 900,000 vehicles in 2012, despite gloom on the car market in the European Union to which most of the production is destined.