Miilux Oy is a Finnish manufacturing company specialised in the production of heat treatment steels and its majority shares were acquired by OYAK in February 2019. On 28 May 2019, Miilux Yüksek Mukavemetli Çelik Üretim A.Ş. (Miilux) was established in Manisa OSB to produce heat treatment steels and is 100% owned by Miilux Oy.

While all of the heat treated products in Turkey were supplied from abroad, this situation has changed today and Miilux ensures the production of heat treatment steels in our country. By being able to provide this production domestically, it has significantly reduced the foreign dependence caused by the supply shortage and currently operates in the heat treatment market as a domestic alternative in the import-dependent product group. By producing heat-treated high-strength steels of strategic importance for our country, Miilux is able to supply the components and plates required for armoured vehicles, mine and ballistic protection system manufacturers and construction machinery, construction, machinery, mining, etc. sectors with competitive conditions and fast delivery times.

Miilux Turkey facilities include heat treatment and quenching line, cold straightening line, tempering furnace, sandblasting-painting, laser cutting machines.