Duplex Stainless Steel 2205 Composition

2205 is the most widely used duplex ferritic austenitic stainless steel grade.

Duplex stainless steel 2205 composition.

2205 is a duplex stainless steel with a chemical composition of nearly equal proportions of austenite and ferrite. Duplex 2205 is a two phase ferritic austenitic 22 chromium 3 molybdenum 5 to 6 nickel alloyed stainless steel. As a result duplex stainless steels display properties characteristic of both austenitic and ferritic stainless stee ls. 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.

The microstructure provides resistance to stress corrosion cracking and ensures high strength. Users choose duplex 2205 for its excellent corrosion resistance along with its high strength. The idea of duplex stainless steels dates back to the 1920s with the first cast being made at avesta in sweden in 1930. Duplex s tainless steel are extremely corrosion resistant work hardenable alloys.

However it is only in the last 30 years that duplex steels have begun to take off in a significant way. Their microstructures consist of a mixture of austenite and ferrite phases. It is the most widely used duplex stainless steel grade and is characterized by high yield strength double that of the standard austenitic stainless steel grades. The following table lists alloy 2205 stainless steel chemical composition based on cast.

Duplex 2205 data sheet specification. 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. Its high chromium and molybdenum content gives the stainless steel excellent corrosion resistance. The following tables show saf 2205 duplex stainless steel datasheet and specifications such as chemical composition physical properties mechanical properties heat treatment welding etc.

Its most important properties are excellent corrosion resistance and high strength. It is important to note that duplex 2205 offers much higher levels of corrosion resistance than most other austenitic stainless steels. Combining many of the beneficial properties of both ferritic and austenitic steels 2205 is the most widely used duplex stainless steel grade. The uns designation for saf 2205 is s31803 s32205 and the en steel no.

Duplex 2205 also known as uns s32205 is a nitrogen enhanced stainless steel. This combination of properties can mean some compromise when compared with pure austenitic and pure ferritic grades.