Tag: duplex stainless steel

What is duplex stainless steel?

Duplex stainless steel is a type of stainless steel that contains a microstructure of both austenite and ferrite. Austenite and ferrite are two different crystal structures that form when stainless steel is cooled from high temperatures. What makes duplex steel unique is that it combines the benefits of both austenite and ferrite structures. Austenite provides good corrosion resistance and ductility, while ferrite offers higher strength and stress corrosion cracking resistance. This combination of properties makes duplex stainless steel well-suited for applications in environments where both corrosion resistance and strength are important, such as in chemical processing, oil and gas, and marine industries.

Duplex stainles steel advantages

Duplex stainless steel offers several advantages due to its unique microstructure and combination of properties. Some of the key advantages include:

  • Corrosion and stress corrosion cracking resistance
  • Strength
  • Abrasion and erosion resistance
  • Good weldability
  • High thermal conductivity

The advantages of duplex stainless steel make it a preferred choice in situations where a balance between corrosion resistance, strength, and other mechanical properties is required for optimal performance and durability. Below you can find a selection of articles related to austenitic stainless steels.

Seaquest Systems to deliver trawlers for Irish owners

Stainless Steel World Publisher -
A pair of new trawlers for Irish owners to be delivered in 2022 and 2023 will be fitted out with deck equipment systems from Killybegs company Seaquest Systems.

Featured Story – At Scoda Tubes Ltd, time is never a...

Stainless Steel World Publisher -
In 2008, Scoda Tubes Ltd was established as a manufacturer of innovative stainless steel pipe and tube solutions. After solid performance during the early years, Scoda Tubes’ growth really sky-rocketed following a management change in 2017.

Sandvik receives the first full order for Sanicro® 35

Stainless Steel World Publisher -
Sandvik Materials Technology has received the first full order for its unique Sanicro® 35 grade that bridges the performance gap between stainless steels and higher-cost nickel alloys.

Featured Story – Positive results for 3D-printed duplex connectors

Stainless Steel World Publisher -
Large-scale 3D metal printing company MX3D has successfully produced a structural connector in duplex stainless steel, designed in collaboration with engineers from Takenaka, one of the largest architecture, engineering, and construction firms in Japan.

Esco Tool introduces Prepzilla MILLHOG® I.D.

Stainless Steel World Publisher -
A portable, I.D. clamping pipe beveling tool that is self-centering and provides plenty of power and torque for aggressively cutting highly alloyed pipe has been introduced by Esco Tool of Holliston, Massachusetts.

ExpaniteHard-Ti replaces DLC Coatings

Stainless Steel World Publisher -
Expanite replaces or supplements the widespread DLC coatings with its technology. Diamond-like carbon or DLC coatings are currently used in many areas where excellent friction properties and good wear resistance are required on component surfaces.

Evolution of O2-based inclusions in an additively manufactured super-duplex

Stainless Steel World Publisher -
A recent study has shown that super-duplex stainless steel powder feedstocks specified for use in directed energy deposition additive manufacturing processes can have an oxygen composition nearly five times higher than that present in comparable wrought forms.

Microstructure and corrosion resistance of underwater laser clad duplex

Stainless Steel World Publisher -
During the long-term service of nuclear power plants, the duplex stainless steel (DSS) plate in the spent fuel pool ages. Its failure mechanism is mainly uniform corrosion, stress corrosion cracking (SCC) and pitting corrosion, which poses a serious threat to the safe operation of nuclear power plants. Repairs are usually done by underwater welding technology to reduce the equipment maintenance costs and exposure to radiation.

Kingsbury’s novel fixture for machining nuclear waste containers

Stainless Steel World Publisher -
Decommissioning legacy nuclear waste silos on a former UK power generating site at Sellafield requires a large number of bins to be machined to close geometrical tolerances to ensure safe stacking.

Expanite replaces DLC Coatings with ExpaniteHard-Ti

Stainless Steel World Publisher -
Expanite replaces or supplements the widespread DLC coatings with its technology. Diamond-like carbon or DLC coatings are currently used in many areas where excellent friction properties and good wear resistance are required on component surfaces.
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Applications of duplex stainless steel

Duplex stainless steel is used in various industries, where it unique combination of properties addresses specific challanges and requirements. Some common applications include:

  • Chemical and Petrochemical Industry: Duplex stainless steel is widely used in chemical processing equipment, such as reactors, heat exchangers, and pipelines, where it provides excellent resistance to corrosive chemicals and high temperatures.
  • Oil and Gas Industry: It is used in offshore and onshore oil and gas platforms, subsea pipelines, and equipment due to its resistance to chloride-induced corrosion, stress corrosion cracking, and high strength properties.
  • Heat Exchangers: Its good thermal conductivity and corrosion resistance make it suitable for heat exchangers used in various industries, including chemical, petrochemical, and HVAC.
  • Water Treatment: It is used in water treatment plants for components like tanks, piping, and valves that come into contact with chemically aggressive water and treatment chemicals.
  • Medical and Pharmaceutical Equipment: Duplex stainless steel is used in medical devices and pharmaceutical equipment that require both corrosion resistance and ease of sterilization.
  • Automotive Industry: Some high-performance exhaust systems and components use duplex stainless steel due to its ability to withstand high temperatures and corrosive gases.
  • Desalination Plants: Duplex stainless steel is suitable for desalination plants where it can withstand the aggressive seawater environment and corrosive chemicals used in the desalination process.
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