In some cases, carbon steels include alloying elements in their chemical composition,the most common being manganese and silicon.
Other alloying elements include chromium, nickel, vanadium, molybdenum, boron, and phosphorous and residual sulfur. These alloy steels are used in a variety of products, including auto parts, agricultural equipment, saws, cutlery, and tools.
There are also micro-alloyed carbon steels, which typically have a low carbon content and very small amounts of niobium, vanadium, titanium, molybdenum, and/or nitrogen. These steels offer good weldability.