Abstract: Ingots with different compositions were prepared by adding Mg and Ag, as well as Sn and Ag to C19210, then hot rolling, cold rolling and aging were carried out in sequence, and the grain structure, mechanical properties and conductivity of different alloy strips were studied during aging at 400 ℃, 450 ℃ and 500 ℃. The results show that the addition of Mg and Ag, or Sn and Ag can hinder the recrystallization and growth of the recrystallized grains during aging process. During 400℃ and 450℃ aging process, the hardness of the alloy with Mg and Ag and the alloy with Sn and Ag remain at about 140 HV and 150 HV, respectively. When the alloys are aged at 500℃, the fully recrystallized grain structures are formed for the alloys with different components, and the hardness of the alloy decreases gradually with the increase of aging time. The conductivity of the alloys with different components increases gradually with the increase of aging time. The conductivity of the alloy containing Mg and Ag, or Sn and Ag can be maintained at about 70%IACS after aging at 500℃ for 0.5 h, while the tensile strength is increased by about 100 MPa.