The aim of this bachelor thesis is after definition of weldments, analysis of materials 11 523 and 17 240 (S23JRG2 and X5CrNi18-10), teoretical processing technology of welding and heat treatment process, suggest and realize laboratory experiment. The experiment will be consist of evaluation mechanical features and metallographic analysis samples without heat treatment and samples after heat treatment- annealing. The results of the test will be served as base for practice needs, especially for engineering company, operating in our region.