What Is The Difference Between Duplex And Stainless Steel?
Duplex stainless steel is a type of stainless steel that contains both austenitic and ferritic steel phases in its microstructure. This unique mixture provides duplex stainless steel with superior strength and corrosion resistance properties compared to other stainless steel grades.
The main difference between duplex and stainless steel is their microstructure. Duplex stainless steel contains both austenitic and ferritic steel phases, while stainless steel only contains austenitic steel phases. This difference gives duplex stainless steel superior strength and corrosion resistance properties.
When compared to austenitic stainless steel, the key changes in composition are that duplex steels have a greater chromium concentration, 20–28 percent; a higher molybdenum content, up to 5 percent; a lower nickel content, up to 9 percent; and 0.05–0.50 percent nitrogen.
Duplex stainless steels are composed of both austenite and ferrite microstructures. As a result, they have substantially higher strength and are resistant to stress corrosion cracking, while being slightly more difficult to construct and having a lower toughness. T
hey may be used in temperatures ranging from -50 to +250 degrees Celsius. Due to their improved strength and corrosion resistance, they are excellent for use in more harsh settings, such as oil and gas, chemical process industries, and maritime environments.
What is duplex stainless steel used for?
Duplex stainless steels are a type of stainless steel that contain both austenitic and ferritic microstructures in their metallurgical structure.
This unique microstructure gives duplex stainless steels a combination of properties that are not found in other types of stainless steel.
Duplex stainless steels are used in a variety of applications, including:
– Chemical process equipment
– Oil and gas production equipment
– Pulp and paper industry
– Desalination plants
– Power generation
– Marine environments
Generally, it is used in a variety of industries and applications, such as chemical processing, oil and gas production, and food processing.
Duplex stainless steel is an alloy of chromium, nickel, and molybdenum, which gives it its unique properties.