In article ,
"Michael A. Terrell" wrote:

Smitty Two wrote:

Yes there are many alloys of solder. 60/40 was the standard for some
time but was replaced 20 years ago by 63/37. That is the only tin/lead
ratio that is eutectic and has been the industry standard for all
soldering AFAIK, for at least 20 years. You may have used 80/20 for some
reason, but it certainly isn't eutectic.


I never claimed that it was.

Well, you wrote:

"80/20 is used for wave soldering, because it has a very narrow
temperature range where it is in a plastic state. this reduces cold
solder joints, by not giving the leads a chance to move while the solder
passes through this state."



If that isn't the definition of eutectic, than you have my apology for
being wrong yet again.