Characteristics of Duplex and Super Duplex Stainless Steel

Duplex and Super Duplex Stainless Steel material are often required for some severe project.What characteristics for them?

Duplex stainless steel

It is a popular material that is used in many industries. The designation of “duplex” comes with the biphasic structural constitution of the austenitic and ferritic phase of both in equal portions. This type of stainless steel is considered best and it is widely chosen over the austenitic and ferritic stainless steel because of its increased strength. It is considered twice as strong as the other metals. Because of its increased strength, the thinner sections can be easily created that in turn provide significant weight savings. All these properties and features make duplex stainless steel the popular choice for various pressure vessels and structural applications.

Duplex stainless steel pipes

The ferritic part of this stainless steel offers good stress corrosion cracking resistance which in turn makes it a popular choice for process plants and hot water tanks. You can get this stainless steel is different grades and can be used for manufacturing various industrial equipment and products.

Super duplex stainless steel

Super duplex is also a part of duplex stainless steel that also has the same benefits but the main difference among both these stainless steel types is the higher amount of chromium as well as molybdenum content that offer super duplex stainless steel with increased corrosion resistance feature.Duplex stainless steels are based around a composition of 22% chromium, whereas super duplex stainless steels are based around a composition of 25% chromium.By increasing the chromium content, the level of pitting corrosion resistance is also increased. However, in order to retain the favourable balance of austenitic and ferritic microstructures, it is also necessary to increase the content of nickel and other elements, which also increases the cost.

Super duplex stainless steel

This type of stainless steel is often used in the heat exchangers, oil and gas industry, chemical processing equipment, offshore platforms, pressure vessels, and boilers. It combines the best attributes of ferritic and austenitic stainless steel and offers outstanding strength as well as ductility with high corrosion resistance.

Both duplex and super duplex stainless steel types are excellent and offer better performance.Contact Haihao Group for more choices.Email:sales@haihaogroup.com