Is it true that the higher the tin content of lead-free solder wire for environmental protection, the better?

Recently, some visitors left messages asking whether the higher the amount of solder in the solder wire, the better! Nowadays, with rapid development, many industries also use various auxiliary materials. Solder is an indispensable part. Solder wire is widely used in society and has too many classifications. People don't know how to choose the right solder wire. Below, the solder paste manufacturer will explain it to you:

Lead-free solder wireAccording to the classification of metal material alloy products, they can be divided into: pure tin solder wire, tin-lead alloy solder wire, tin-copper alloy solder wire, tin-silver-copper alloy solder wire, tin-bismuth alloy solder wire, tin-nickel alloy solder wire and solder wire made of unique tin-containing aluminum alloy materials, etc. The quality of solder wire has little to do with the wire itself. It mainly depends on what kind of solder wire is suitable for your product. Generally speaking, the higher the purity of the solder wire, the better.

The rosin content in the solder wire(Flux content)It is also very large. Generally, the rosin content of domestic tin wire is1%The rosin content of tin wire from overseas is around2.2%As mentioned above, the rosin content of the solder wire defines the fluidity of the solder. Usually, in the case of manual soldering of many domestic solder wires, there is an excessive amount of solder dross. This is because when soldering a spot weld, although the amount of solder wire is sufficient, the rosin content is low, causing the solder wire to be flowable. The solder wire sent later only uses flux, and the unnecessary solder wire is consumed. Therefore, the effective flux content has a relatively significant effect throughout the soldering process. Generally, the recommended rosin flux content for the solder wire used in fully automatic soldering machines is2.5%The above, the flux content specified for the unique soldering equipment can be at3.0%Even4.0%,4.5%.

The above is an explanation of the key points for everyone. Currently, there are differences between silver-containing and non-silver-containing products on the market. The silver-containing ones have a lower melting point, which increases tensile strength and electrical conductivity, but the cost is relatively high. The low-cost ones are non-silver-containing and tin-copper alloys. Generally, there are no problems in welding and using these products. Therefore, choosing a suitable product for yourself is the most important. For example, when makingLEDLow-temperature solder paste is used, but low-temperature is not universal and is only applicable to specific products. You can contact the relevant brand, and these questions will be relatively answered.