Stainless steel doesn’t contain any iron? Wow.

I don’t think we worked with stainless steel in my blacksmithing class, but I would guess it has a higher percentage of iron than “cast iron” does.

I’m trying to imagine what the guy was thinking that could have made this a reasonable statement. There are certainly filling-and-implant materials that don’t contain iron, and maybe some of them look kinda like steel….