High carbon steel is a type of steel that contains a higher percentage of carbon, typically between 0.6% and 1.4%. This increased carbon content enhances its hardness and strength, making it suitable for applications that require durability, such as cutting tools and blades. However, it can also make the steel more brittle, which may limit its use in certain situations. Due to its properties, high carbon steel is often used in the manufacturing of items like knives, saw blades, and springs. It is important to note that while it can be heat-treated to improve its toughness, it requires careful handling to prevent cracking or breaking under stress.