Availability of the computer simulation based onthe nucleation and growth models have been examined bycomparing the results of simulation with those obtained by chilltest of the Fe-C-Ni-Si-Cr multicomponent cast iron using awedge-shape mold. A linear growth model for ledeburitecombined with the radial growth model for gray eutectic wasintroduced and the prediction showed a satisfactory agreementwith the observed distribution of chill fraction and chill depth. Thegraphitizing ability of silicon was comparable with the anti-graphitizing ability of silicon. It was demonstrated from the resultsof simulation that silicon equivalent of chromium, given bySE*=(%Si)-(2/3)(%Cr) as a chilling index, showed a goodcorrelation with logarithmic chill depth and logarithmic criticalcooling rate for chill formation
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