Our commonly used solder wire is also called solder wire, solder wire is a kind of welding data, solder wire is composed of tin alloy and additives two parts, solder wire composed of tin 63% and 37% lead is called eutectic solder, so how much is the melting point of the solder wire?

The melting point of the solder wire is 183℃. When the tin content is higher than 63%, the melting temperature increases and the strength decreases. When the tin content is less than 10%, the welding strength is poor, the hair is brittle, and the solder smooth ability is poor. The ideal is eutectic solder. At eutectic temperatures, the solder changes directly from solid to liquid without passing through a semi-liquid state. The melting temperature of eutectic solder is lower than that of non-eutectic solder, thus reducing the chance of damage to the welded element. Because eutectic solder changes from liquid to solid directly, it also reduces the phenomenon of virtual welding

Generally, the melting point of lead-free solder wire is high, at about 227℃. The melting point of different solder wire materials will not be very different. Therefore, before using solder wire, first understand how high temperature your solder can withstand, and then select the lead-free solder wire suitable for solder melting point. Now on the market commonly used several lead-free solder wire standards and solder melting point.

1. Tin 99.3 copper 0.7, solder melting point is 227℃, belongs to eutectic solder.

2. Tin 96.5 silver 3 copper 0.5, solder melting point 218℃, properties close to eutectic solder.

3. Tin 42, bismuth 58, solder melting point is 138℃, is eutectic solder.

4. Tin 91 zinc 9, solder melting point is 199℃, is eutectic solder.

5. Tin 5 zinc 95, melting point is 382℃, is eutectic solder.

Trust the melting point of solder wire is how much we all know, now commonly used solder wire is divided into lead solder wire and lead-free solder wire two categories, its standard and melting point and many other parameters are different.

The above is a summary of the melting point of various solder wires.