Önerler Makine Çelik Isıl İşlem Ltd.Şti. first started heat treatment activities with a small electric furnace built by its founder Master Technical Teacher Adem ÖNER in 1967, started to import tool steel in 1974 and it continued its activities by adding a salt bath. With the opening of the organized industrial zone in 1971 and the activation of automobile factories such as Tofaş-Fiat and Renault, a rapid development took place in the industry. This development has increased the importance of heat treatment and steel. Since this date, Önerler has started its growth process to adapt to developing technology. Until the establishment of the heat treatment workshop of Tofaş-Fiat company in 1986, the heat treatment of many automobile and mold apparatus parts of this company was performed by Önerler Ltd. Şti and the supply of steels such as tool steel, alloyed carbon steels, case-hardening steels has been provided. This relationship still continues through sub-industries.
