First I tried a MYOG experiment, and made a stove by cutting off the bottom of an Arizona Tea aluminum can, only to later learn of my "error" (occasionally, ignorance is bliss, maybe?) :)
It wasn't until a bit later that I read that you're not supposed to use aluminum with esbit since esbit burns about 200° hotter and melts alum.
Since the stove was already made, I thought I'd try it anyway. Well, after a good 20 or more burns, still no problems!
Does anyone know, and can explain, the physics/science behind why my aluminum can-bottom hasn't been destroyed yet? How is the heat being dissipated or how is the can being insulated, or...other...?
Details, if they matter/help:
The can bottom is used inverted so that the concave surface allows the esbit to properly form a small pool during the burn.
Wind screen is always used (around a FireLite 550 Ti pot).
The sides of the can are cut very short so that the tab height in my can stove closely approximates the height of the tab when it's in my Ti-wing stove. The can delivers a boil slightly faster than the Ti-wing.
The only thing I can see on the can is the esbit residue you always get.
Much appreciate your answers.
edit - reposition a text line & add: no additional heat shield is used under the stove.