When soldering, the solidus temperature of the filler metal must be ____________ compared to the substrate material?

Show Answers

Higher than the substrate's melting pointLower than the melting point of the substrateThe same as the substrate's melting temperatureThe temperature does not matterNot applicable

Explanation

The solidus temperature of the filler metal should be lower than that of the substrate to ensure the filler melts without damaging the base material during soldering.