Regular steel is made up of about 99% iron and around 0.2% to 1% carbon. On the other hand, stainless steel usually has between 62% and 75% iron, up to 1% carbon, and over 10.5% chromium.

Iron is the main ingredient in various forms of iron and steel, but the various types of metals contain other elements as well. Sometimes these elements are unwanted; other times they're ...