To pass the exam, no practical application

The properties of metallic materials strongly depend on heat treatment

To understand possible problems with delivery material or thermally treated part is necessary to understand material content and thermal treatment

The materials are sold in various heat treatment conditions, which understanding is possible if you know the heat treatment. 

Often technical drawings imply to mechanical properties obtainable only through some kind of thermal treatment. For heat treatment cost evaluation is necessary to know their types and in which country or firm they can be done. 

Most heat treatment operations can not be carried out in Estonia, so it is not essential to know about the heat treatment