Carbon, the basic alloying element of steel, affects the hardness and strength properties of steel. In general, it contains between 0.4 and 1.5% of the carbon element. The increased carbon content increases the hardness to a certain extent, reducing the weldability of the steel. Examples of applications are machine construction, shafts, gears, bolts and nuts. High-carbon steels are also included in the Islah Steels group because they can be treated.
