Abstract: This work investigated the effects of addition of silicon carbide (SiC) as nano particulate reinforcement material on the mechanical properties of AA2618 alloy. The experiment was conducted by adding varying weight percentage fractions of silicon carbide (SiC) nano particles: 5%, 10%, 15%, 20%, 25% and 30%, to molten AA2618 alloy via compocasting route. On solidification, the samples were machined and mechanical properties test such as hardness, ultimate tensile strength, density; Young’s modulus and yield strength were carried out. The results indicated that the developed method was quite successful to obtain uniform dispersion of particle reinforcement material in the matrix of the alloy. The hardness, ultimate tensile strength, density, Young’s modulus and yield strength were found to increase as the percentage of silicon cabide (SiC) reinforcement particles increased except for ductility that decreased with increase in the percentage of reinforcement particles. Therefore nano silicon carbide (SiC) particles were found to be good reinforcement material for AA2618 alloy composite.