... according to use of temperature is 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 ... wire Sn70Pb30,Sn60Pb40,Sn55Pb45,Sn50Pb50,Sn45Pb55,Sn40Pb60,Sn30Pb702.Lead-free solder wire Sn-Cu0.7, Sn-Cu3.0, Sn-Cu0 ...