What are the main categories of steel materials

Steel materials are classified according to the following conditions:
Chemical composition: such as carbon steel, low alloy steel, stainless steel
Smelting method: such as open hearth steel, converter steel, electric furnace steel
Processing technology: such as hot rolling and cold rolling
Product shape: such as thick plate, thin plate, strip, pipe and profile, etc

Deoxidation methods: such as killed steel, semi killed steel and rimmed steel
Microstructure: such as ferrite steel, pearlite steel and martensite steel
Strength level: for example, the tensile strength of A420 grade C in ASTM standard is between 515Mpa and 655Mpa
Heat treatment process: such as annealing, quenching, tempering and thermal machining

According to the carbon content, steels are often divided into the following three categories:
Low carbon steels such as AISI 1005 to AISI 1026, IF, HSLA, TRIP, and TWIN steel.
Medium carbon steel, e.g. AISI 1029 to AISI 1053
High carbon steel, e.g. AISI 1055 to AISI 1095

In addition, according to the European standard classification, steel materials can be divided into the following categories:
Non alloy steel, e.g. EN DC01-DC06; S235; S275
Alloy steels, such as 2CrMo4 and 25CrMo4
Stainless steel
Tool steels, e.g. EN 1.1545; AISI / SAE W110; EN 1.2436, AISI / SAE D6
Sheet and strip
Electrical steel plates and strips, e.g. EN 1.0890 AND EN 1.0803