Selection of equipment and procedures for heat treatment significantly affects the performance and price of machine parts and tools, and the competitiveness of the industrial sector. In the Republic of Croatia usage of heat treatment processes and existing production capacity for this treatment has not been systematically analyzed yet. Therefore, the aim of this study was to explore the usage of procedures and equipment for heat treatment in Croatia. The study was performed by counties in order to get better insight into existing facilities, as well as the need for them. As a reference of heat treatment procedures the incidence and trends of equipment usage for heat treatment was analyzed for developed countries. A list of companies that are registered for the implementation of heat treatment in Croatia was made, and the universal questionnaire was sent to all of these companies. Based on 23 positive responses from 160 sent, inquiry was conducted to analyze the need for certain procedures and distribution of equipment for heat treatment in the Croatian counties. From the analysis of questionnaire results follows that in the Republic of Croatia, the most common method is heat treatment of the whole volume that was represented with a share of about 80%, while the heat treatment metod of modification and coating surfaces was represented approximately 20%. In developed countries, the entire heat treatments of the whole volume was represented approximately 33%, and the methods of modification and coating surfaces with 67%.