[en] Reliability of sodium-heated steam generators is the key element to successful demonstration of Liquid Metal Fast Breeder Reactor. Corrosion resistance of the alloy selected for constructing the steam generators is paramount to high component reliability. A program was undertaken in th US to study the corrosion resistance of 2 1/4Cr-1Mo alloy, the reference construction material for the sodium heated steam generators. Test conditions selected for the experiments represent a wide spectrum of normal and faulted chemistry environments. The results obtained were used to establish (a) the basis for corrosion allowance in design, and (b) an understanding of temperature regimes, metallurgical condition and concentration of impurities that must be avoided in order to achieve high reliability of components. Experimental details, major findings, and significance of these to component reliability are reviewed in this paper