... divided into two kinds 300-400,250-300oC. Lead-free solder wire(Sn99.3Cu0.7) : alloy composition Sn-Cu0 ... .7Solder features1.High strength, good mechanical properties and solder joint reliability.2.The sensitivity of impurity is low ... Sn70Pb30,Sn60Pb40,Sn55Pb45,Sn50Pb50,Sn45Pb55,Sn40Pb60,Sn30Pb702.Lead-free solder wire Sn-Cu0.7, Sn-Cu3.0, ... Sn-Zn9.0, Sn-Sb5, Sn-Bi58. Lead-free solder wire(Sn99.3Cu0.7)