Why Does Soldering Require Overshooting the Melting Point?
Have you ever wondered why the soldering iron tip or reflow oven needs to get so much hotter than the melting point of the solder alloy itself? If SAC305 fully melts at around 220°C, why are we setting reflow peak temperatures 20 degrees higher? Why is the soldering iron tip cranked up to 350°C?
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