Stainless steel tube steel classification

Steel integrated classification

The ordinary steel a. Carbon steel, low alloy steel, B. C. Specific uses of common structural steel

The high quality steel ( including high grade steel ) a. Structural steel ( a ): high quality carbon structural steel; ( b ) alloy structural steel; spring steel; ( c ) ( d ) ( E ) easy to cut steel; bearing steel; ( f ) application specific high quality structural steel. B: ( a ) tool steel carbon tool steel; ( b ) alloy tool steel high speed tool steel; ( C ).

C. Special performance of steel: ( a ) stainless steel; ( b ) heat-resistant steel; ( c ) electrothermal alloy steel; ( d ) electrical steel; ( E ) high wear-resistant manganese steel.

According to the classification of steel quality

Of high quality steel ( P, S = 0.035% )

The high grade steel ( P = 0.035%, S = 0.030% )

The ordinary steel ( P = 0.045%, S = 0.050% )

Steel classified by chemical composition

Alloy steel: a low alloy steel ( alloy element content is less than or equal to 5% ); b. Alloy steel ( alloy element content > 5 ~ 10% )

C high-alloy steel ( alloy element content > 10% ).

The low carbon steel carbon steel: a ( C < 0.25% ); b. Carbon steel ( C = 0.25 ~ 0.60% ); C ( C = 0.60% ) of high carbon steel

The steel press forming method classification

The hot rolling mill;

The cold drawn steel.

The forged steel;

The cast steel;

Steel is classified by use

1: a tool steel carbon tool steel; B alloy tool steel high speed tool steel; C.

The special performance of steel A: stainless steel; B steel: including antioxidant steel, heat-resistant steel, valve steel; C. Electrothermal alloy steel; D steel; E. Cryogenic steel; f. Electrical steel.

The professional steel: such as bridges with steel, ship steel, boiler steel, pressure vessel steel, machinery, steel.

The construction and engineering steel: a. Ordinary carbon structural steel; B low alloy structural steel; C steel.

The structural steel a. Mechanical manufacturing steel: ( a ) quenched and tempered steel; ( b ) surface hardening steel structure: including carburizing, nitriding steel, surface hardened steel; ( c ) free cutting structural steel; ( d ) cold forming steel : including cold stamping steel, cold heading steel.

B spring steel

C bearing steel