What soldering gun wattage is needed for metal chassis soldering/desoldering?

[bob91343]

A very cheap and effective iron is a propane torch with a soldering iron tip. I have one and it works beautifully. I also have an assortment of soldering guns (I hate those!) and various irons, up to an old ESICO 100 W that works great.

The secret is to have a tip with large thermal mass so it doesn't immediately cool on laying it to the work. The power rating is secondary, as you don't expect transfer from electrical power to the work directly. Let the tip get hot for ten minutes and, if it's big enough, it will do the job.