The composition of Cu-Fe-P alloy（Cu-2.5Fe-0.12Zn-0.03P-0.05Mg-0.05Cr-0.05RE）was designed by micro-alloying method.Microstructure of the alloy was observed by OM（optical microscope）and HRTEM

and tensile strength

elongation and electric conductivity of the alloy were examined.The results reveal that at a given experiment condition

the cold rolled alloy plates after aging at 550 ℃ for 4 h exhibit overages

in which spheroidal precipitates γ-Fe are coarsened with size in range of 50 to 100 nm

and the tensile strength

micro-hardness and electric conductivity of alloy are 482 MPa

161 and 39.7 MS/m

respectively

while the alloy exhibits under-ages after aging at 450 ℃ for 4 h

in which the size of shperoidal precipitates γ-Fe is lower than 20 nm

and tensile strength

micro-hardness and electric conductivity are 417 MPa

139 and 30.4 MS/m

respectively The alloy exhibits peak ages after aging at 550 ℃ for 2 hours and 450 ℃ for 2 hours

in which size of spheroidal precipitates γ-Fe is in range of 20 to 50 nm

and the tensile strength

micro-hardness and electric conductivity of alloy are 510 MPa

168 and 40.6 MS/m

respectively.