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1953 Marathon Celik
Marathon Celik Adi Komandit Sirketi, founded by Mehmet Ganiyusufoğlu.
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1973 Korkmaz Celik
Korkmaz Çelik Ltd. was founded.
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1992 Dudullu OSB
Company mooved to the newly founded organized industrial zone.
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1994 Salt Bath
Salt bath facility was founded in Dudullu OSB.
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1996 Assab Korkmaz
A joint venture company Assab Korkmaz A.S was founded with swedish company Assab.
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1996 Vacuum Furnace
Turkey's first vacuum heat treatment center was founded in Dudullu OSB.
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2008 Korkmaz Çelik A.Ş
Joint venture with Assab has ended, and Korkmaz Celik A.S returned to independent business with 100% Turkish capital.
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2009 KORKMAZ ÇELİK MANİSA AND BURSA
2.5 Million € investment in vacuum heat treatment facilities and steel service centers in Bursa and Manisa.