tin solder wire and bar are based on tin, lead free alloy are compliant to ROHS regulation. lead-free solder wires:SpecMeltingpointTensile strengthExtensibilityRate of spreadUsageSn100232204370Electroplating anode barSn-Cu0.7227304570Lower cost, high melting point, poor wetting, low caplillarity, poor fatigue property, can be used for low requirements soldering.Sn-Ag3.5222385475Higher cost,SnAg3. ...