Abstract
The phase composition of Fe-40Al-xC (at.%) alloys depends on the content of C. The part of the quasibinary phase diagram is determined using light optical microscopy (LOM), Vickers hardness measurements (HV) and X-rays diffraction (XRD). The composition of the tested alloys approaches in succesive steps Pyroferal^© alloy used in the fifties to replace the high chromium and nickel alloyed cast iron. The structural data are compared with those resulting from quasibinary Fe40Al-xC as well as ternary Fe-Al-C phase diagrams.

Key words
Iron aluminide (Fe-Al type), phase composition

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