This work is part of a general programme of modelling of microsegregation for a multicomponent steel. An efficient 1D numerical model has been developed for the quantitative prediction of microsegregation [1] in order to be coupled with a macrosegregation model, which allows a multi-scale approach to the solidification of an ingot [2]. The specific aim of this work is to test the quality of this numerical tool. Comparisons between numerical results and the experiments of Addad et al. [3] will be presented and discussed. Various representations of the results relative to the solute weight fraction can be generated by the model: line profile or cumulative profile for instance. The choice of the most pertinent representation for the qualitative and quantitative comparison will be further discussed thanks to the line-scans and cumulative profiles experimentally established by Addad et al. [3].