Most locally-manufactured corn-mill plates in tropical countries are made of grey cast iron due to its relatively low cost, good wear resistance, good hardness and other mechanical properties in general. However, these corn-mill plates are prone to corrosion and abrasive wear resulting to contamination of milled corn which is consumed by humans. This work focuses on the use of computer-aided selection and weighted property methods to identify alternative materials for grey cast iron corn-mill plates. Requirements such as non-toxicity, good corrosion resistance, good wear resistance, low friction coefficient, high thermal conductivity, low specific gravity, high compressive strength and low cost were used in the initial material selection stages. The derivation of material performance index in addition to Ashby's materials selection chart are used to find suitable materials to replace grey cast iron. The decision method showed that white cast iron with high-chromium alloy had the highest weighted performance index (93.75%), while nodular graphite cast iron had the least weighted performance index (65.55%). High-chromium alloyed white cast iron was therefore considered as substitute for the grey cast iron corn-mill plates.