To develope new lead-free solders with the melting temperature close to that of Sn-37Pb [Math Processing Error] , Sn-0.7Cu-5Pb-1Ga, Sn-0.7Cu-5Pb-1Ag, Sn-0.7Cu-5Pb-5Bi-1Ag, and Sn-0.7Cu-SBi-1Ag alloys were composed by adding low-netting elements such as Ga, Bi, Pb, and Ag to Sn-0.7Cu. Then the melting temperatures, microstructures, wettability, and adhesion properties of these alloys were evaluated. DSC analysis showed that the melting temperature of Sn-0.7Cu-SPb-1Ga was [Math Processing Error] , and those of other alloys was in the range of [Math Processing Error] . Microstructures of these alloys after heat-treatment at [Math Processing Error] for 24 hrs were basically composed of coarsely- grown [Math Processing Error] grains, and [Math Processing Error] and [Math Processing Error] intermetallic precipitates. Sn-0.7Cu-5Pb-1Ga and Sn-0.7Cu-5Pb-5Bi-1Ag showed excellent wettability, while Sn-0.7Cu-5Bi-1Ag and Sn-0.7Cu-5Pb-5Bi-1Ag revealed good adhesion strength with the Cu substrates. Among 4 alloys, Sn-0.7Cu-5Pb-5Bi-1Ag with the lowest melting temperature [Math Processing Error] and relatively excellent wettability and adhesion strength was suggested to be the best candidate solder to replace Sn-37Pb.