New materials are constantly developed to improve the resistance to chloride induced stress corrosion cracking (SCC). This thesis deals with the investigation of SCC behavior of new austenitic stainless steels. With constant load tests two new CrNiMoMnN-alloys and one superaustenitic reference alloy have been investigated. The materials were tested in solution annealed condition and with different degrees of cold working. 45 % magnesium chloride solution at a temperature of 120 °C was used as medium. The aim was to determine the threshold stress of SCC initiation. The results show that the two CrNiMoMnN-alloys are highly susceptible to SCC in the chosen environment. Cracking happened at stresses as low as 15 % of yield strength. The superaustenitic alloy, which was only tested in the 27 % cold-worked condition, showed a higher resistance. Up to 30 % of yield strength, the material was resistant to SCC. Even at higher loads, significantly longer times to failure were found for this material when compared to CrNiMoMnN steels. Its higher nickel content was responsible for the better resistance to SCC. With a scanning electron microscope fractographic examimations of the fracture surface were carried out. Mostly transgranular cracking with a variable fraction of ductile residual fracture depending on load was obtained.