What is the difference between carbon steel and stainless steel?

The main difference between carbon steel and stainless steel is the amount of chromium they contain. Carbon steel has less than 10.5% chromium, while stainless steel has at least 10.5% chromium. Chromium is a metal that helps prevent rust and corrosion.
Other differences include:
Mechanical properties: Carbon steel is stronger and harder than stainless steel, but less ductile and malleable.
Appearance: Carbon steel has a dull, matte finish, while stainless steel has a shiny, polished look.
Cost: Carbon steel is usually cheaper than stainless steel, because it has fewer alloying elements and less processing