I have a technique I'd use to add heat resistance to steel. Only necessary If we lived in a doomed world where engineers didn't exist and I was asked to make s

I have a technique I'd use to add heat resistance to steel. Only necessary If we lived in a doomed world where engineers didn't exist and I was asked to make steel more heat resistant. Cover steel beams in a relatively thick later of plaster of paris mixed with very find grain sand. I built a charcoal forge out of that material (I used quartz sand I got from a pool supply store) and it's ludicrously heat resistant. It's lined with 4mm of aluminum (melting point 660°C) and the plastersand layer is about 25mm thick. I can melt steel bar above it without causing any visual changes in the aluminum body. I've used it about 20 times in the last year. Lots of spalling on the plaster layer but for most architectural applications I doubt you need to have a blower fueled inferno happen > 2 times a week during the summer. I wager real engineers have more cost effective, data driven solutions. Just thought it was a neat fact.