The characteristic properties of aluminum alloys, high strength stiffness to weight ratio, good formability, good corrosion resistance, and recycling potential make them ideal candidates to replace heavier materials. In recent years, Al alloys have been applied in heat exchangers in order to improve their corrosion resistance, mechanical properties and formability to meet the challenge of reducing the in thickness of the heat exchanger tube. Some alloy elements, not only increase the corrosion resistance of the aluminum alloy anodes, but also destroy the passivity of alumina film and improve the electrochemical activity of the alloy. In the present work, the effect of rare earth metals addition on the microstructure and mechanical properties of Aluminum alloys. Aluminum alloys were hot-extruded into a rod that was 12mm in thickness. The microstructure and mechanical properties of specimens was examined by X-ray diffraction, scanning electron microscopy, optical microscopy and tensile test.