This steel contains iron, carbon and small amounts of other elements. About 95% of the total world, Crude-steel output belongs to this class. It is plain carbon steel is further classified as follows:‑
a) Low Carbon Steel in which carbon content is bellow 0.2%.
b) Medium Carbon Steel with carbon content from 0.2 to 0.5%.
c) High Carbon Steel with carbon content above 0.5%.
The plain carbon steel is used for structural shapes, plates, tube pipes. rods and bars, tools, wheels, axles and rails.