Originally Posted by coewar
Hi. There is no rule that says it must be stainless steel. In fact I almost never heard of that. Regular steel most of the time. (not treated to be stainless). But Aluminum I think would be totally fine; it conducts heat very well though (much better than steel) so just don't touch it. :)
Based on how thin it is, eventually it may wear down and break. So at that point you make another one. I just use some thin screen and wrap it to make a wide circle. Been using that for almost 2 years now.
I would not be surprised to see aluminum melt or at least lose shape, it melts at 1220 but gets soft at a LOT lower temp. I have used aluminium sauce pans on a hotplate to melt lead and they quickly get a bulge in the middle of the heating coil, and the temp should be 600f or so.