Removing relay without damaging pcb (plated through holes)
In article ,
"David" wrote:
"Al" wrote in message
...
Defintion of eutectic:
"The lowest temperature at which a mix of two materials will melt. Often
the temperature is an anomaly, that is, it is much lower than the
melting temperatures of only slightly different mixtures. Lead-tin
solder is an example. Lead melts at 327C, tin at 231C. The lowest
melting combination is 67 lead, 33 tin (180C). Non-eutectic mixtures
have a melting or softening range. Such mixtures do not flow well until
thoroughly heated past the softening range."
Jeesh, get a dictionary.
Al
I thought it was 67% TIN and 37% lead.
David
That's your high tech military alloy, 104% total. Not allowed for
commercial applications. But you're a lot closer than the dictionary
reader. 63 tin, 37 lead.
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