These work great for sweating copper pipe. Solder will flow in about half
the time as propane. Your application seems like it would need something
hotter--the MAPP gas is basically for soldering. It might be worth a try,
though,  since the cans are only a few bucks and work with regular propane
soldering tips.

For small, easy welds, I go to the local muffler shop. Usually costs $15 or
so depending on the welder's mood.