HIGH CARBON STEEL

                    Steel that has more than 0.3 percent carbon, and is thus harder and less formable and machinable than low-carbon steel. Used mainly for cutting EDGEs, compression springs, farming and gardening equipment, and other high-wear applications.

                    Carbon steel is steel where the main interstitial alloying constituent is carbon in the range of 0.12-2.0%. The American Iron and Steel Institute (AISI) defines carbon steel as the following: "Steel is considered to be carbon steel when no minimum content is specified or required for chromium, cobalt, molybdenum, nickel, niobium, titanium, tungsten, vanadium or zirconium, or any other element to be added to obtain a desired alloying effect; when the specified minimum for copper does not exceed 0.40 percent; or when the maximum content specified for any of the following elements does not exceed the percentages noted: manganese 1.65, silicon 0.60, copper 0.60."

                    The term "carbon steel" may also be used in reference to steel which is not stainless steel; in this use carbon steel may include alloy steels.

                    As the carbon percentage content rises, steel has the ability to become harder and stronger through heat treating, however it becomes less ductile. Regardless of the heat treatment, a higher carbon content reduces weldability. In carbon steels, the higher carbon content lowers the melting point.