Three different white cast irons alloyed with Cr and Si were prepared in order to study their distribution be-havior in matrices and carbides. The specimens were produced using a 15kg-capacity high frequency induction fur-nace. Melts were super-heated to 1600 ? C , and poured at 1550 ? C into a pepset mold. Three combinations of the alloys were selected so as to observe the distribution behavior of Cr and Si : 0.5%C-25.0%Cr-1.0%Si(alloy No. 1), 0.5%C-5.0%Cr-1.0%Si(alloy No. 2) and 2.0%C-5.0%Cr-1.0%Si(alloy No. 3). Cellular M 7 C 3 carbides- δ ferrite eutectic were developed at δ ferrite liquid interfaces in the alloy No. 1 while only traces of M 7 C 3 carbides- δ ferrite eutectic were precipitated in the alloy No. 2. With the addition of 2.0% C and 5.0% Cr, ledeburitic M 3 C carbides instead of cellular M 7 C 3 carbides were precipitated in the alloy No. 3. Cr was distributed preferentially to the M 7 C 3 carbides rather than to the matrix structure while more Si was partitioned in the matrix structure rather than the M 7 C 3 carbides. K m for Cr was ranged from 0.56 to 0.68 while that for Si was from 1.12 to 1.28. K m for Cr had a lower value with increased carbon contents. The mass percent of Cr was higher in the M 7 C 3 carbides with increased Cr contents.