Welded joints made of copper alloys and austenitic steels are commonly used in heat exchangers, pipelines and other equipment typical of the power industry. The above-named materials are difficult to weld because of their varying thermal properties. The obtainment of proper welded joints necessitates the performance of tests aimed to develop a technology enabling the welding of copper and austenitic steels. This article provides insight into research dedicated to the development of a TIG welding-based technology enabling the joining of copper and austenitic steel.