When choosing materials for components under corrosive as well as abrasive stresses, compromises have to be made, currently. High-carbon ferritic steels of the type X 120 CrMo 29 2 are highly resistant against tribological stresses. However, they have only a moderate corrosion resistance, since the main part of the chromium is present in chromium rich carbides. Ferritic-austenitic duplex stainless steels with elevated carbon contents, like the alloy G-X 40 CrNiMo 27 5 (material number 1.4464), are more corrosion resistant than the ferritic-carbidic alloy, but they are less wear-resistant.

The paper presents results of the research on the development of both, highly wear-resistant as well as highly corrosion-resistant alloys. The high-carbon ferritic-austenitic alloy G-X 40 CrNiMo 27 5 serves as a basis for this purpose.