Tensile Properties of Ferrite-austenitic Welded Joint

Very often, in order to optimized welded constructions, some of their parts are made of heterogeneous steels. For example, microalloyed steels are in use for cars chassis making and high alloyed steels for different constructions making. From that reason, it’s not rare to find welded joints between ferrite microalloyed and austenitic highalloyed steels. As a rule, these joints are welded by using highalloyed filler material. In that way, obtained welded joint is made of five different materials (two base metals, weld metal and two different heat affected zones). In the paper, tensile properties of ferrite-austenite welded joints on a storage tank for liquid carbon dioxygen are analysed. Using the results of the research, the appearance of some cracks on the welded joints at the connection part of the tank are explained.