Structure: The crystal structure of iron is face-centered cubic structure, while the structure of stainless steel is austenite or ferrite. The formation of these two structures depends on the content and proportion of elements such as chromium and nickel in stainless steel.
2. Chemical composition: Chromium in stainless steel is the main component of its corrosion resistance, which can form a dense chromium oxide layer, thus making steel have better corrosion resistance. In addition, nickel in stainless steel can also improve its corrosion resistance and strength. The carbon content in iron has a great influence on its properties and uses.
3. Performance: Stainless steel is more resistant to corrosion, stronger and higher temperature than iron, which makes it widely used in manufacturing and construction fields. Iron is easier to oxidize than stainless steel, so it is easy to rust.