Stainless steel is an expensive but desirable alloy because of its resistance to corrosion and extreme heat. You’ve certainly cooked with it or seen it in a bathroom, because it won’t rust (or it takes a very long time to rust) depending on if the metal has been contaminated during the forging or fabrication process.
Stainless differs from carbon steel by the amount of chromium present. Chromium oxide forms on the surface by a process called passivation which coats the metal in a kind of protective shield against corrosives if there is enough oxygen.
Stainless requires a high forge heat and hard hammer blows. The metal is tough and takes a while to move. I don’t recommend forging it past a high red heat because it has a greater tendency to crack and splinter if forged cold. After some wire brushing and grinding, it produces a beautiful, shiny finish; and after some direct heat, it produces the temper colors very vividly.