The hot air gun reaches temperatures between 392 and 840 degrees ... Because lead-free solder has a high melting point, lead-free soldering stations are often more powerful than their standard ...

[Martin Thuo] at Iowa University used this property to make solder joints at room temperature using Field’s metal (a combination of bismuth, indium, and tin). The key is a process that coats the ...

But what happens if the same idea is used to create a low voltage instead of a high one? [D. Creative] has a soldering gun project doing just this, making a low voltage at a very high current.