Electronics > Beginners
The best solder for electronics
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NivagSwerdna:
It depends on the amount of work you do... I do small quantities only and love my https://uk.farnell.com/edsyn/su35100/solder-wire-62-36-2-183-deg-100g/dp/871394

It's 0.35mm Sn62Pb36Ag2 (0.014" in old money)

OP DiegoBrown has 1 Post; Welcome  ;)
Monkeh:

--- Quote from: Audioguru on July 05, 2019, 02:10:38 am ---60/40 solder was used a long time ago and if the connection is moved as it cools then it forms a bad solder joint. Electronics assembly today uses lead-free or 63/37 Sn-Pb. 63/37 solidifies immediately and makes very good joints.

--- End quote ---

60/40 is readily available and used today and causes no problems.
tooki:

--- Quote from: Monkeh on July 05, 2019, 09:39:47 am ---
--- Quote from: Audioguru on July 05, 2019, 02:10:38 am ---60/40 solder was used a long time ago and if the connection is moved as it cools then it forms a bad solder joint. Electronics assembly today uses lead-free or 63/37 Sn-Pb. 63/37 solidifies immediately and makes very good joints.

--- End quote ---

60/40 is readily available and used today and causes no problems.

--- End quote ---
But 63/37 is superior and is only trivially more expensive, so for the hobbyist, I see no reason to use 60/40, which is noticeably more sensitive to movement during solidification, producing what's called a "disturbed joint".
magic:
You guys are nuts with that eutectic obsession :scared:

I for one actually like Pb-free because it is very easy to remove from PCB in its "paste" phase. No wicking, no sucking, it just comes off.
I don't use it mainly because of higher temperature and out of worry about whiskers.
kosine:
Yes, the 63/37 alloy is known as eutectic ("melts well" in Greek). Basically means it has a single melting/freezing point rather than being semi-molten over a range of temperatures.

There are other alloys with similar properties. https://fctsolder.com/eutectic-solder/

60/40 isn't that much worse, and the cheaper varieties probably aren't exactly 60/40 in any case.

Personally, I've always found the thickness of the solder wire to be more important. The thinner stuff seems easier to work with for most components. As long as it contains flux - though a flux pen makes things much easier in any case.
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