Stainless steel elbow is different from carbon steel elbow is mainly different material, its chemical composition will keep the surface of the elbow for a long time will not rust, will not be corroded. Steel with a minimum chromium content of 10.5% and a maximum carbon content of 1.2%.

Austenitic stainless steel

The matrix is made of stainless steel with face-centered cubic austenite structure (γ phase), non-magnetic, mainly strengthened by cold processing (and may lead to a certain magnetic).

Austenitic – ferrite (duplex) stainless steel

A stainless steel with a magnetic substrate containing both austenite and ferrite (the content of the smaller phase is generally greater than 15%), which can be strengthened by cold working.

Ferritic type stainless steel

The matrix is a stainless steel with ferrite structure (α phase) dominated by body core cubic crystal structure. It is magnetic and generally cannot be hardened by heat treatment, but it can be slightly strengthened by cold working.

Martensite stainless steel

The matrix of martensitic structure, magnetic, through heat treatment can adjust its mechanical properties of stainless steel.

Precipitate hardened stainless steel

The matrix is austenitic or martensitic structure, and can be hardened (strong) by precipitation hardening (also known as aging hardening) treatment of stainless steel.

Stainless steel

1Cr18Ni9Ti 0Cr18Ni9 00Cr19Ni10 0Cr17Ni12Mo2Ti 00Cr17Ni14Mo2 304 304L 316 316L etc

National standards for implementation of stainless steel pipe fittings:

Description of Standard Number

GB12459 Steel butt welded seamless pipe fittings

Butt welded pipe fittings of steel plate GB/T13401

Forged steel socket welding pipe fittings

Forged steel threaded pipe fittings

Gb9112-9131 Steel pipe flanges, flange covers and gaskets for flanges

Japanese Standard for Implementation standards of Pipe Fittings:

Description of Standard Number

General purpose steel butt welded pipe fittings

Steel butt welded pipe fittings

Butt-welded pipe fittings made of steel plate

Steel socket welding pipe fittings