At the Department of Ferrous Metallurgy (IEHK) steels grades in the system Fe-Mn-C are under investigation, because extraordinary mechanical properties of these steels result from the metal-physical deformation-mechanism. The microstructure forming and the deformation-mechanism are regulated by the chemical composition. The aim of the project, in the frame of SFB 761, is focused on the formation of model materials with different alloying composition and cooling rates, as well as the determination of melting and solidification parameters and their influencing factors. One task is the metallurgical treatment of critical elements for high manganese steels; the gases hydrogen, nitrogen and oxygen. A problem to be solved is that the melting of high manganese steels tends to manganese losses in the liquid.