Welding aluminum without a $900 machine

WOW this is crazy, seems to work great on small parts though.
Sure with enough heat it would work the same on large.
Probably need 2 torches, one for the part, one to "weld"

I know its not the best but small custom none stress load parts could be easy to get done at home.

this pic is crazy, thats one strong soldered "buttweld".

http://forums.sohc4.net/index.php?topic=36600.msg391787

"I received my Alumaloy, and did a little trial run, using a scrap of 3/8 inch diameter by 2 1/2 inch long aluminum of unknown alloy. Using a propane torch, it didn't take very long to get the scrap up to temperature- they say 728F. I built about a 1/8 inch dome on the end. It adhered well, and polished up nicely- see pic. The color is a pretty good match, and as you can see, it is actually shinier than the base metal."
http://viragotechforum.com/phpBB/files/alumaloy_trial_jpeg.jpg

Definitely NOT as strong as heli-arc'ing it, but, for small stuff that isn't overstressed, OK, not great, but OK.

To weld aluminum, with any method, you need to get the part HOT, so it anneals (softens). I put the part into an oven and heat it equally before welding.