Hi And - low carbon or high carbon steel will both rust. You will need to use stainless steel if you want to avoid rust. The DO does not itself radiate/generate heat. The oven its in heats the DO which has a slower thermal response then the oven itself (ie it has a higher thermal mass) so its internal temperature is more consistent. But then a good oven is all of that as well. Sorry none of your links work. Use the advanced tab below and attach your images vs using a link. Peter and yes you can laser cut patterns and weld together nearly any shape in steel, stainless steel or aluminium....