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Old 06-19-2017, 09:19 AM   #1
socratez
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Default Solder 80/20 PB/Sn

I picked this type of solder at the dollar store. Can i use this alloy to hold components to pcb?
On the wiki, it mentions it can hold radiator fins together. Which is usually copper or aluminum.

Am I correct that it has a wider temp range to solidify so it can cause broken joints more likely to form if not held steady?

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Old 06-19-2017, 10:19 AM   #2
Andrew F. Ali
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Default Re: Solder 80/20 PB/Sn

Normally there is 60/40 Solder for electronic work...Solder does not hold aluminum together.
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Old 06-19-2017, 10:42 AM   #3
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Default Re: Solder 80/20 PB/Sn

Lead is cheaper than tin, that's perhaps why it's at a dollar store...

I wouldn't use this stuff if I can avoid it. Yes it may stick but you have to be careful as likely you'll get cold joints if you touch it even slightly while cooling and not have clamps to hold the parts steady during cooling.
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Old 06-19-2017, 10:49 AM   #4
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Default Re: Solder 80/20 PB/Sn

80% lead sounds dangerous,
it may be for soldering metal panels together prior to finishing - like for car body's
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Old 06-19-2017, 02:17 PM   #5
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Default Re: Solder 80/20 PB/Sn

Well it is used for copper radiators, I'd imagine car bodies are welded not soldered.

I don't think welding copper works very well in air...
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Old 06-19-2017, 02:20 PM   #6
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Default Re: Solder 80/20 PB/Sn

Quote:
Originally Posted by eccerr0r View Post
Well it is used for copper radiators, I'd imagine car bodies are welded not soldered.

I don't think welding copper works very well in air...
car bodies used to be lead filled along the seams . also for filling dents and rust holes .
copper can be spot welded .
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Old 06-19-2017, 05:03 PM   #7
socratez
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Default Re: Solder 80/20 PB/Sn

Ok, thanks all. I'm not going to use it.
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Old 06-19-2017, 05:11 PM   #8
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Default Re: Solder 80/20 PB/Sn

i have been using this spec with no troubles at all ...MBO 0.7mm Wire Lead solder, +183 → +190C Melting Point, 40% Lead, 60% Tin,
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Old 06-19-2017, 09:42 PM   #9
socratez
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Default Re: Solder 80/20 PB/Sn

@petehall347, thank you!
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Old 06-20-2017, 01:38 PM   #10
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Default Re: Solder 80/20 PB/Sn

Just make sure its NOT "acid core" solder
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