[tuetuopay]

Give a shot to the SAC305 mix. It’s a low temperature lead-free alloy, and it’s the one that made me ditch leaded solder definitively. Use more flux and a bit more iron temperature and you’ll never touch leaded solder again. Oh, and it’s available both as a hand-soldering wire reel and solder paste.

[Animats]

It's the 3% silver that does it. That gets the melting point down. Unfortunately, the price of silver has tripled since 2023. Hobbyists won't use enough solder to notice, but it's an issue in production.