How to Choose Solder ?

Users should consider at least three factors when choosing the suitable solders.

  1. 1. Select the Solder Composition

A. Generally, solders can be divided into lead-free and lead or high and low temperature due to different standards. The high temperature solder is suitable for easily accessible connections while low temperature one is for smaller and crowded connections.

B. Next choose the alloy. Usually, lead solder is made up of 40% tin and 60% lead (40/60), 50% tin and 50% lead (50/50), 60% tin and 40% lead (60/40) or 63 % tin and 37% lead (63/37). The higher the tin content is, the lower the melting point can be. And the most common lead-free solder has 95% tin and only 5% antimony. But it has a melting point between that of 40/60 and 50/50. Choose the most proper solder according to the exact usage.

  1. 2. Select the Diameter of the Solder Wire

Lichuang solder wire’s diameter ranges from 0.01 inch (0.25 mm) to 0.125 (3.25 mm). The solder wire is used to help welding. Commonly, the smaller the diameter of the wire is, the faster it will melt. However, if the diameter is too small, users will not get enough solder on the joint. Whereas it is too large, excess heat may damage the components or users may get s solder blob.

  1. 3. Select Core or Coreless Flux

Flux is necessary for solder joints which includes tin coating soldering flux, lead-free water soluble, tin-lead and lead free flux. Users may choose one type depending on actual need.

For more information, please contact us.

Various alloys differ from each other in solidus and liquidus temperature. Please refer to the images below to get more details.
Click for detailed information.

Related Products