[Amps] current threads about silver solder and resoldering

[Manfred Mornhinweg]

Bill,

> Most things are labeled the largest component to the smallest by weight,

Yes, for example the list of chemicals in food is like that. But solder 
normally isn't. I think there is an ISO standard defining solder alloys, 
and it requires tin contents to be specified first. I would have to 
search for it to provide any evidence, though.

> Such as eutectic alloy of 63% tin, 37% lead.
> Oddly enough with that ratio by weight the number of atoms of each is equal.
> One atom of lead to one of tin.

I strongly disagree. Tin has much lower atomic weight than lead. If 
there is far more tin, by weight, than lead, then the ratio of atoms of 
tin to atoms of lead is even larger. According to my calculation, 63/37 
solder has slightly more than 3 atoms of tin for each atom of lead.

Manfred

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