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Do you still use leaded solder? I was today refused to buy it ...
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ogden:

--- Quote from: SiliconWizard on November 15, 2021, 08:46:45 pm ---For prototyping (hand soldering), I've been using lead-free solder (Multicore 96SC) for over 10 years now for most small SMD soldering, but for all through-hole and wiring jobs, I mostly use leaded solder.

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Why don't you use leaded solder for SMD? No such solder-paste anymore?
TimFox:

--- Quote from: jesuscf on November 15, 2021, 08:43:25 pm ---They should ban the sell of leaded bullets as well!!!

--- End quote ---

Starting in 1987, lead shot was banned in the USA for hunting waterfowl, since much of it ends up in the water to poison other life forms by ingestion.
See:  https://www.fws.gov/birds/bird-enthusiasts/hunting/nontoxic.php
wraper:

--- Quote from: PKTKS on November 15, 2021, 07:11:56 pm ---There is absolute no comparison to the strong bonded alloy of LEADED when compared to crappy brittle LEAD FREE, in particular in aged (even very shortly failed aged) devices...
IMHO this whole LEAD FREE hairy shit heads is just to justify a business model where REPAIR is no longer an option and an entire wasteland landfill would be formed by such "disposal"

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Oh, come on. I've seen more of the tin-lead solder joints cracked than lead-free. Cracking issue is more about single layer PCB (no hole plating) rather than solder.
SiliconWizard:

--- Quote from: ogden on November 15, 2021, 08:49:56 pm ---
--- Quote from: SiliconWizard on November 15, 2021, 08:46:45 pm ---For prototyping (hand soldering), I've been using lead-free solder (Multicore 96SC) for over 10 years now for most small SMD soldering, but for all through-hole and wiring jobs, I mostly use leaded solder.

--- End quote ---
Why don't you use leaded solder for SMD? No such solder-paste anymore?

--- End quote ---

I must admit honestly that it's not really for an environmental or health reason. It's mainly because a decade ago or so, I had to renew my fine solder wire stock, and right when I needed to buy, I couldn't find what I was looking for as leaded solder. So I bought that, and I've been pleased with the results, so I kept using it. The particular wire I've been using (Multicore 96SC/ 3C 511) has the plus of containing a flux that I find less nasty than most fluxes I have found in leaded solder, actually, so that's also a reason. For small SMD work, I have no problem compared to leaded solder either.

But for anything with larger thermal mass, I still use leaded solder (for which I have ample stock too.)

And for solder paste, I've used both leaded and lead-free. Mostly depending on availability for that matter, since solder paste in small quantities (I'm talking for prototyping use here of course, not for production) is not always available as leaded, and you can't stock large quantities as they expire pretty fast.
TimFox:
One should be careful about mixing the two types, however.
I was told that adding leaded solder to an unleaded solder was bad, but not vice-versa.
However, "Pb-free" leads on ICs, etc., can be soldered with leaded solder.
At my former employer, we did still use some leaded solder but kept separate solder stations for that purpose, to avoid contamination of the ROHS-soldered circuits.
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