Lead-free solder wire(Sn97Cu3.0): according to use of temperature is divided into two ... 300-400 oC, 250-300 oC Lead-free solder wire(Sn97Cu3.0) : alloy composition Sn-3.0CuSolder features1.High strength, good ... . small diameter 0.3mm, 0.5mm Lead-free solder wire(Sn97Cu3.0)