Stainless steels are classified as having what minimum percentage of chromium?

Stainless steels are defined by their chromium content, which is essential for their corrosion resistance properties. The minimum percentage of chromium that qualifies a steel as stainless is typically around 10.5%. However, to ensure that the material has the necessary corrosion resistance in a variety of environments, it is often stated in classifications as having at least 12% chromium. This higher threshold helps to ensure that the stainless steel can effectively form a passive layer of chromium oxide, which protects the underlying metal from oxidation and rust, making it ideal for applications where durability and corrosion resistance are crucial. This classification not only enhances the material's strength but also increases its versatility in various industrial applications.