In a word, no. A fire steel has to be of high carbon steel. They are heated and hammer shaped then forge welded together in a lap joint. Recently I read an email from a museum curator who thought they were punched out from thin steel, but all I have seen show the weld joint. I will say, on some, you have to look close. Of course, it is possible that some were punched out, but I have some doubts. Files make very good fire steels. These oval steels were usually quite thin. Somewhere from 3/32", to 1/8", give or take