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Pb solder wire : Sn60/Pb40 or Sn63/Pb37 ?

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JacquesBBB:
Hello All,

I  see the end of my 500g 1mm main solder wire roll which is a Sn60/Pb40. I am wondering if I should switch to a Sn63/Pb37 mix, which is the eutectic mix.

What is your best choice ?

coromonadalix:
i would not care 60/40 or 63/37

BUT  i would check for the core rosin type   if it's acid based  etc ....

You have "no clean" types, rohs (for me the worst of them) sometimes you have to add liquid flux

TimFox:
Personally, I prefer Sn62 Pb36 Ag2 ternary eutectic alloy.
Be sure to get rosin-core flux (RA or RMA) for normal THT and wire soldering, not "no-clean".
No-clean is good for PCB assembly when the metal is clean.

JacquesBBB:
Thanks all for the advise  on rosin core.

@TimFox,

what advantages do you see in  Sn62/Pb36/Ag2 ? is it the  lower melting point ?

JacquesBBB:
As this may be the last solder spool I buy, I  better choose wisely . At Mouser, I see

https://www.mouser.fr/ProductDetail/AIM/13772?qs=M7ZD%2F0QMIQxPWSj3dL3bjA%3D%3D
and
https://www.mouser.fr/ProductDetail/Kester/24-7150-0018?qs=m5JL4TdtMhxY2BNlvHJMxg%3D%3D

for Sn62/Pb36/Ag2

Both in 0.025 in, rosin core

Any preference ?

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