FŇUKALOVÁ VERONIKA: Comparison of MAG and plasma welding. My master´s thesis describes questions of welding of high-firmed and high-abrasion resistant steels with welding processes MAG (Metal Active Gas) and plasma. The weldability of CREUSABRO 8000 steel was passed judgement on, based on literary study of high-abrasion resistant steel question. The technology, characteristics of welding, kind of additional material were proposed. Tensile tests, brittleness tests for determination of strength characteristics and hardness tests of welding joints were implemented and analyzed experimentally. Further were analyzed macrostructure and microstructure. Other alternatives of high-firmed and abrasion resistant steels are part of my master’s thesis.