Used at the shipyard for several months. Works primarily on Double Guard .045 and .035 as well as 7018 and 6010 and some stainless alloys. I can't find a duty cycle for this machine, just keeps running without getting hot, but not with the crappy Blitz and Tig guns they give you, which brings me to the only downside I have on the unit. If you are planning more than just an occasional hobby get the Tweco 250 Speed Gun, it works really well. The TIG torch is bulky and awkward to use. Not sure why they have a torch valve when the unit has a built in MIG gas solenoid valve? In general, I am very satisfied with the device. I had an analogue of Lincoln and Miller, this one leaves them far behind.