A steel alloy is a mixture of steel and other elements, which enhances its properties for specific applications. Common alloying elements include carbon, manganese, chromium, and nickel. These additions can improve strength, hardness, corrosion resistance, and ductility, making the alloy suitable for various industries, including construction and automotive. Different types of steel alloys serve distinct purposes. For example, stainless steel contains a high percentage of chromium, which provides excellent resistance to rust and staining. On the other hand, tool steel is designed for high wear resistance and is often used in manufacturing cutting tools and dies.