Stainless steel is a corrosion-resistant alloy material that is usually composed of iron, carbon, chromium, and other elements. Stainless steel is often used in the manufacture of kitchenware, building materials, mechanical equipment, and other products because it is not easy to rust, has excellent corrosion resistance, and strength. Stainless steel can be classified into many types according to its chemical composition and organizational structure, and each type has different characteristics and uses.