Steel is an alloy of iron and carbon. All steel is carbon steel. Carbon steel is used to refer to steel with carbon as the main alloying element.
In carbon steel, its properties are primarily determined by its carbon content. For this alloy, the content of other alloying elements such as chromium, manganese, cobalt, and tungsten is not defined.
There are four types of carbon steel based on carbon content.
●Low carbon steel carbon (0.05 -0.25%)
●Medium carbon steel carbon (0.30 -0.59%)
●High carbon steel carbon (0.6 -0.99%)
●Ultra high carbon steel carbon (1.0 -2.0%)
Hardness increases with increasing carbon content. They can be successfully heat treated. So usually these are very strong and hard, but can be less ductile.
Mild steel has a carbon content between 0.16 and 0.3%. Therefore, it is a mild steel with a very low carbon content. It is difficult to tell whether the steel is gentle or not with the naked eye, which is a microscopic geometric error.
Mild steel is a "soft and formable" material, an inexpensive material with good weldability, formability, and low toughness-brittleness transition temperature. They are used in cars, trucks, boat hulls, bridges and other structures designed to handle large amounts of stress or any structure that requires large amounts of steel. It is often used in rebar or I-beams and is sometimes called "structural steel."
