Hallo erstmal. I would like to know how nitriding steel works, how it hardens steel, whether it makes it more brittle and basically everything else that is interesting about it. also, I was wondering whether carbon migration has a similar effect, and whether the carbon forms a compound with the iron, and what is the maximum percentage of carbon you can have in steel... is it true that in ancient greece (or was it rome) people heated swords and slashed up their prisoners to harden the blades, or is that just a myth?? answers please. thank you. cucumber.