Duplex Stainless Steel 2205 Composition

However it is only in the last 30 years that duplex steels have begun to take off in a significant way.

Duplex stainless steel 2205 composition.

Alloy 2205 uns s32305 s31803 is a 22 chromium 3 molybdenum 5 6 nickel nitrogen alloyed duplex stainless steel plate with high general localized and stress corrosion resistance properties in addition to high strength and excellent impact toughness. The uns designation for saf 2205 is s31803 s32205 and the en steel no. Saf 2205 also known as sandvik saf 2205 is a sandvik owned trademark for a 22cr duplex ferritic austenitic stainless steel. Duplex 2205 is a two phase ferritic austenitic 22 chromium 3 molybdenum 5 to 6 nickel alloyed stainless steel.

Saf derives from sandvik austenite ferrite the nominal chemical composition of saf 2205 is 22 chromium 5 nickel 3 2 molybdenum and other alloying elements such as nitrogen and manganese. Its high chromium and molybdenum content gives the stainless steel excellent corrosion resistance. The idea of duplex stainless steels dates back to the 1920s with the first cast being made at avesta in sweden in 1930. As a result duplex stainless steels display properties characteristic of both austenitic and ferritic stainless stee ls.

The microstructure provides resistance to stress corrosion cracking and ensures high strength. 2205 is a duplex stainless steel with a chemical composition of nearly equal proportions of austenite and ferrite. 2205 is the most widely used duplex ferritic austenitic stainless steel grade. This combination allows the alloy to be stronger and tougher than standard austenitic steels.

Its most important properties are excellent corrosion resistance and high strength. Their microstructures consist of a mixture of austenite and ferrite phases. Applications include chemical processing oil and gas exploration marine and other high chloride environments and paper digestors. Duplex s tainless steel are extremely corrosion resistant work hardenable alloys.

It is important to note that duplex 2205 offers much higher levels of corrosion resistance than most other austenitic stainless steels. This combination of properties can mean some compromise when compared with pure austenitic and pure ferritic grades. The following tables show saf 2205 duplex stainless steel datasheet and specifications such as chemical composition physical properties mechanical properties heat treatment welding etc. Duplex 2205 data sheet specification.

Users choose duplex 2205 for its excellent corrosion resistance along with its high strength. The following table lists alloy 2205 stainless steel chemical composition based on cast.