According to the chemical composition, can be divided into carbon steel, low alloy steel, stainless steel and so on; The commonly known DC01 is carbon steel, HC340LA is low-alloy steel, and SUS 304 is stainless steel.

According to the smelting method can be divided into open furnace steel, converter steel, electric furnace steel; For example, tool steel with high quality requirements is often produced by electric furnace.

According to the processing technology and delivery state can be divided into hot rolled steel and cold rolled steel; For example, the common JIS brand SPHC is hot rolled, SPCC is cold rolled, SGCC is cold rolled hot galvanizing, SECC is cold rolled electric galvanizing, SGLCC is cold rolled hot aluminum zinc plating, SGMCC is cold rolled hot galvanized aluminum magnesium and so on.

According to the product shape, can be divided into thick plate, sheet, strip, pipe and profile, etc. 

For example, the common GB number Q345B has more than 30 different product shapes. The classification of steel can usually be divided into the following types:

According to the chemical composition, can be divided into carbon steel, low alloy steel, stainless steel and so on; The commonly known DC01 is carbon steel, HC340LA is low-alloy steel, and SUS 304 is stainless steel.

According to the smelting method can be divided into open furnace steel, converter steel, electric furnace steel; For example, tool steel with high quality requirements is often produced by electric furnace.

According to the processing technology and delivery state can be divided into hot rolled steel and cold rolled steel; For example, the common JIS brand SPHC is hot rolled, SPCC is cold rolled, SGCC is cold rolled hot galvanizing, SECC is cold rolled electric galvanizing, SGLCC is cold rolled hot aluminum zinc plating, SGMCC is cold rolled hot galvanized aluminum magnesium and so on.

According to the product shape, can be divided into thick plate, sheet, strip, pipe and profile, etc. For example, the common GB number Q345B has more than 30 different product shapes.

According to the deoxidation method of steelmaking, it can be divided into sedated steel, semi-sedated steel and boiling steel; Such as our common hot dip galvanized deep drawing brand DX56D+Z is a kind of aluminum sedated steel.

According to the microstructure of steel, it can be divided into ferritic steel, pearlite steel and martensitic steel, etc. Such as SUS304 austenitic stainless steel in JIS, SUS440A martensitic stainless steel (commonly used tools) are classified according to this.

According to the mechanical properties of steel, it can be divided into low carbon mild steel for cold forming (such as, IF steel), traditional high strength steel (such as, low alloy high strength steel), phase change strengthening high strength steel (such as, dual-phase steel, QP steel, etc.); This classification is most common in automotive steels, and the beloved banana diagram is a typical example.

According to the heat treatment process at the time of delivery, it can be divided into annealing, quenching, tempering and thermal machining. For example, steel plates for cold stamping are usually delivered by annealing, and some tool steels are delivered by quenching.