S22453 austenite-ferrite stainless steel (duplex) is a high chromium, low nickel, low nitrogen stainless steel that provides a combination of corrosion resistance and strength. The alloy contains 24 percent chromium and 6 percent nickel in its composition, as well as 3 percent molybdenum, nitrogen and other trace elements. This gives it excellent corrosion resistance, especially in sea water environments. The high chromium content also results in good ductility and high hardness.
The S22453 duplex stainless steel has good weldability and can be welded with standard stainless steel electrodes. The alloy has the same properties in welding and cold forming as traditional austenitic stainless steels, but with improved strength levels. The weld strength of S22453 is roughly 45 percent higher than 316L, but only about 5 percent higher than austenitic 304 stainless.
The S22453 duplex stainless steel provides extremely good corrosion resistance in many severe environments. It combines the beneficial characteristics of both ferritic and austenitic stainless steels. It is particularly resistant to localized corrosion such as pitting and crevice corrosion, which are commonly caused by chloride ions. It is also highly resistant to stress corrosion cracking and general corrosion.
The S22453 duplex stainless steel is a cost-effective alternative to other corrosion-resistant alloys such as super austenitic and nickel-based alloys. It has excellent cryogenic toughness and strength, making it suitable for use in cryogenic environments. It is also highly resistant to erosion corrosion and cavitation erosion.
The S22453 duplex stainless steel is often used in the petroleum, chemical, paper and power generation industries, where its combination of strength and corrosion resistance is highly valued. It is well-suited to a variety of applications, including pressure vessels and valves, heat exchangers, hubs, turbine blades and fasteners.
The S22453 duplex stainless steel is typically produced in the form of cold-worked plates and sheets, as well as seamless and welded tubing. It is available in a wide range of surface finishes, including bright annealed, pickled and shot blasted finishes.
In order to ensure consistent performance and reliability, the S22453 duplex stainless steel should be tested in accordance with ASTM and DIN standards. Specialized testing is also recommended for specific applications, such as NDE tests for welding and non-destructive testing for crack detection. Care should be taken to ensure that proper fabrication processes are employed to create components from this alloy.
The S22453 duplex stainless steel is a highly corrosion-resistant alloy that combines the beneficial characteristics of both ferritic and austenitic stainless steels. It has good weldability and can be used in a variety of industrial and marine applications. It is available in a wide range of forms and surface finishes, and should be thoroughly tested before being employed in any given application.
