In addition to carbon, carbon steel generally contains a small amount of silicon, manganese, sulfur and phosphorus, while iron does not. Carbon steel is actually iron. "Iron" is a name relative to other kinds, which is used to distinguish copper, aluminum, lead and so on. In fact, iron is steel. Iron used to be divided into "pig iron" and "wrought iron". Pig iron is called iron, and wrought iron is called steel. Carbon steel is a classification of steel, which can be divided into two categories: carbon steel and alloy steel.

For example, various brands of steel plates, steel bars and profiles are commonly used as "carbon steel". For example, various brands of saw blades, drills, cutters, stainless steel and Wugang are all "alloy steels".

Extended data

Iron is a metal element with atomic number 26 and its chemical formula is Fe. Pure iron is white or silvery white with metallic luster. Melting point 1538℃, boiling point 2750℃, soluble in strong acid and medium acid, insoluble in water. Iron has zero, +2, +3 and +6 valence, of which +2 and +3 valence are common and +6 valence is rare.

References:

Baidu encyclopedia-iron