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What Is Material Of 2205 Duplex Stainless Steel Plate?

Feb. 20, 2019

The microstructure of 316l Stainless Steel Plate includes an austenite phase and a very small amount of ferrite phase. This is mainly formed by adding a sufficient amount of nickel to the alloy to stabilize the austenite phase. The nickel content of wrought 316L stainless steel is generally 10-11%. The chemical composition of the duplex stainless steel is adjusted to form a microstructure containing approximately equal amounts of ferrite and austenite phases (see figure below). 2205 duplex stainless steel is formed by reducing the nickel content to about 5% and adjusting the addition of manganese and nitrogen to form about 40-50% ferrite. The chemical composition of 2205 Duplex Stainless Steel Plate is balanced, so the austenitic phase and the ferrite phase have a large equivalent corrosion resistance. "Biphasic" refers to a microstructure having two phases of austenite/ferrite.

The increase in nitrogen content of 2205 duplex stainless steel and its fine grain microstructure make it have higher strength than common austenitic stainless steels such as 304L and 316L. Under solid solution annealing conditions, the yield strength of 2205 duplex stainless steel is approximately twice that of 316L stainless steel. Due to this higher strength, the allowable stress of 2205 duplex stainless steel can be much higher, depending on the design specifications used in the manufacture of process equipment. In many applications, the wall thickness can be reduced to reduce weight and save costs.

2205 Duplex Stainless Steel Plate

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