What is the Eutectic Point when Soldering?

Dated:2016-10-23      Popularity:1011

You may learn the eutectic point as you work with soldering. Eutectic solder is a formulation that has a particular percentage of 63 tin and 37 lead. At this percentage ratio, solder has a unique property where it has a very low melting point, and if you choose any other formulation with a little bit more tin or a little bit less tin, the melting point is higher. When you have non-eutectic solder, there exists a range of temperatures where the solder can exist as a liquid and a solid simultaneously; and that gives it a sort of characteristic that you can use to mold or shape the solder as its cooling and forming.

This can be an advantage in some cases such as with plumbing, where you may have a wiped joint, but in the case of electronics, often is the case you want the solder joint to cool very, very quickly and become solid all at once; in which case you’re more apt to use eutectic solder. Eutectic solder is often easier to work with when working with electronics.


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