Carbon Steel

Carbon Steel:  The mixture of Iron and Carbon along with Manganese 1.65%, Silicon 0.60% will yield Carbon steel.Carbon steel, also known as  plain carbon steel, is a metal alloy, which basically consists of iron and carbon. Besides these two elements, it also consists of other alloying elements like silicon, copper and manganese in quantities which are almost negligible. These products are abundantly used for various industrial applications, it is particularly used in boilers and heat exchangers. 

Few typical compositions of carbon steel are as follows: 

Mild Carbon Steel (Low Carbon): It contains roughly 0.05-0.15% carbon material for low carbon steel and 0.16-0.29% carbon material for mild steel. Mild steel has a fairly low tensile strength, but it is low cost and flexible, surface hardness can be raised through carburizing. 
Medium Carbon Steel: Carbon content is around 0.30-0.59%. It has good wear resistance and balances ductility and strength, used for large parts, forging and automotive components. 
High Carbon Steel: Carbon content is around 0.6-0.99%. Since it is very strong it is used for springs and high-strength wires. 
Ultra-High Carbon Steel: It has around 1.0-2.0% carbon material. Widely used in non-industrial applications like knives, axles or punches.