Machine building or the fabrication of industrial equipment elements often necessitate the use of welding methods enabling the joining of materials, the physical properties of which differ to a significant extent [1]. Dissimilar joints can often be found in power equipment, chemical systems or reactors. For instance, in power boilers, heat exchanger pipes made of austenitic steels and exposed to very high temperature are joined with system elements made of ferritic steels [2]. Austenitic-ferritic steels and duplex steels are used, among other things, in the construction of chemical tankers [3]. Dissimilar joints are also found in tank elements made of duplex steel joined with fixtures made of high-strength low-alloy steels [4, 5]. The article presents examples of ultrasonic tests concerning joints of heat-resistant steel 13CrMo4-5 with austenitic steel 316L.

DOI: 10.17729/ebis.2023.1/5