Solder Shelf Life - 96-Sn/4-Ag

I have some Kester rosin core wire solder (96-Sn/4-Ag) that has
exceeded its shelf life. According to Kester's knowledge base, their
Shelf Life Policy statement states that:
"Flux cored solder wire has a limited shelf life determined by the
alloy used in the wire. For alloys containing more than70% lead, the
shelf life is two years from date of manufacture. Other alloys have a
shelf life of three years from date of manufacture."
I would like to know the mechanism of degradation of the alloy.
Reply to
paulo57509
Loading thread data ...
Might be simply the flux.
Might be simply the Kester's bank account.
They speak of only the fluxed solder. I suspect it might out-gas or dry out.
If you have any trouble with it wetting I'd snip off several inches and start again. I suspect it isn't through wall migration but end leak.
There are many fluxes as well. I doubt the claim to be general in nature against all fluxes - some of which are organic and some inorganic.
I wouldn't sweat the small stuff. That is quality solder.
That is often used to solder to ceramic.
Martin [ I have 7/8 of a roll in the shop as well ] Mine is 40 years old and still works.]
snipped-for-privacy@gmail.com wrote:
Reply to
Martin H. Eastburn

Site Timeline

PolyTech Forum website is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.