Aluminium cerium master alloy has been added in experimentally in casting alloys (eg. AlSiMg alloy,..etc) to increase fluidity and reduce die sticking. By adding cerium into the alloy, the strength and hardness at room as well as high temperature increase. Beside that, it also help to refine eutectic structure, decrease ductility, harden by dispersion (by precipitation of AI4Ce phase.), and influence the rate and precipitation of solid phases. Cerium increases the recrystallization temperature of aluminium, if Ce > 0.5%.