Electronics > Manufacturing & Assembly

Good lead free solder for hand soldering

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peter-h:
I can confirm the above Solder King stuff is OK at 340C.

tepalia02:
You can consider this one : https://www.sparkfun.com/products/9325

nigelwright7557:
They used lead free solder on satellites for a while.
Then to their horror found it starts to whisker over time causing shorts.

tooki:

--- Quote from: nigelwright7557 on April 19, 2022, 04:18:04 pm ---They used lead free solder on satellites for a while.
Then to their horror found it starts to whisker over time causing shorts.

--- End quote ---
I don’t believe that chain of events for a second, since the aerospace industry investigated tin whiskers long, long before the move to lead free. What has been found are tin whiskers from pure tin plating on component legs.

peter-h:
I think the whiskers story is more complicated, but I am not sure how it went.

For sure the issue got gradually sidelined by leg pitch not going below 0.55mm (the Japs went down to 0.35mm but it didn't last long) and then the big chips went to BGA which has huge spacing.

The worst whiskers were found where the substrate was stressed after tin plating e.g. extruding the old metal transistor cases from tin plated sheet. Where the plating was done after the substrate forming, the situation was a lot better.

That Sparkfun stuff is in the USA.

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