Duplex stainless steels have a ferritic-austenitic microstructure, in roughly equal proportions 50% ferrite and 50% austenite. Duplex combines many of the attractive properties of ferritic and austenitic stainless steels into one.
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Different variants for Duplex
Duplex stainless steels are designed to provide better corrosion resistance, in particular to stress corrosion and pitting corrosion. The microstructure leads to higher strength than standard austenitic stainless steels such as Type 304 or 316. Duplex stainless steels have become more and more popular in recent years. There are several variants available, such as Duplex 2205, Superduplex 2507 or lean duplex with lower nickel content.
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The new LiKOSET thickener from ANDRITZ, a solution for efficient clarification of liquids and recovery of slurry, is built from high-quality duplex stainless steel, thus making it suitable for corrosive and humid operating conditions.
Acerinox has received the platinum medal from Ecovadis, the highest score awarded by the rating platform for evaluating Corporate Social Responsibility.
Alleima has received a major order for advanced tubes and umbilicals for the oil and gas customer segment, to a total value of about SEK 240 million (EUR 18.2).
The Award honours an individual who has excelled in their efforts to selflessly share their knowledge and experience, and promote the use of duplex stainless steels as a sustainable, efficient, and successful materials solution.
KSB S.A.S., a French company belonging to the KSB Group, received three major orders to equip several wind turbine installation vessels (WTIV) with the Multitec series high-pressure pumps.
Sverdrup Steel’s partner company Fabtech was commissioned by Equinor to build footbridges to replace the existing footbridges on the Mongstad facility.
By the end of 2022, the KSB Group will have supplied pumps and valves for an electrolysis plant generating green hydrogen.
In the Norwegian industrial...
KSB S.A.S., a French company belonging to the KSB Group, received three major orders to equip several wind turbine installation vessels (WTIV) with the...
Sverdrup Steel’s partner company Fabtech was commissioned by Equinor to build footbridges to replace the existing footbridges on the Mongstad facility. The pre-existing bridges...
Corrosion Resistance: Duplex stainless steel has excellent corrosion resistance due to its high chromium and molybdenum content. It is particularly resistant to stress corrosion cracking and pitting, which makes it suitable for use in harsh environments.
Strength: Duplex stainless steel is much stronger than conventional austenitic stainless steels, which allows for thinner and lighter constructions without sacrificing durability.
Toughness: Duplex stainless steel has a high toughness, which means it is resistant to brittle fracture and impact. This property makes it suitable for use in cryogenic applications.
Cost-effectiveness: Although duplex stainless steel is more expensive than conventional austenitic stainless steels, its superior properties can lead to cost savings in the long run by reducing maintenance and downtime.
Versatility: Duplex stainless steel can be used in a wide range of applications, including chemical processing, oil and gas, marine, and pulp and paper industries. It is also used in construction and architecture due to its aesthetic appeal.
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