A concentric solidification technique was employed to simulate the segregation of alloying elements at the progressing solid/liquid interface during solidification of continuously cast steel. Microstructural development of low carbon steel upon solidification has been observed in-situ in a laser-scanning confocal microscope. However, the value of these simulations can be significantly improved by using Thermo-Calc and DICTRA software as an aid in an approach to quantitative analysis. The effect of cooling rate on the sequence of events during solidification of an Fe-0.18%C alloy was investigated and simulations will be compared to experimental observations. Copyright © 2007 MS&T'07®.