1.welding bar 2.lead-free solder bar,low melting point, 3.good fluidity and ... invasive abilitygood thermal fatigue resistance information of the lead-free solder bar SAC solder has good wet ability and the ... of tin slagrange of the application:widely used in lead-free automatic wave soldering, applicable to mix sudstance or the ... truly a point — not a range 20kg/box lead-free welding bar(Sn-0.7Cu)