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.

SS LD24 – new Duplex grade from Sverdrup Steel

Stainless Steel World Publisher -
Metal prices have increased strongly for months, and as far as we can see, this will continue into 2022. For companies utilizing 304L and...

Cool repair: Laser metal deposition repair to duplex pump

Stainless Steel World Publisher -
Keeping important assets operational is essential in the oil and gas sector, so preventative maintenance plays an important role.

Mid Sweden Uni & Sandvik sign 5-year agreement

Stainless Steel World Publisher -
Mid Sweden University and Sandvik have signed a five-year partnership agreement which includes investment in an electron beam melting machine at Mid Sweden University. “We...

Oerlikon presents a new alloy to replace DSS

Stainless Steel World Publisher -
Oerlikon AM presents a new alloy to customers who are interested in being at the forefront in adopting an innovative new material to additively produce structural components, such as centrifugal pump impellers.

Duplex World Update collection of technical papers

Stainless Steel World Publisher -
The Duplex World Update collections of technical articles are an exciting new service for the global duplex stainless steel community…and they’re completely free! The...

Duplex brochure now in English, German, Chinese

Stainless Steel World Publisher -
Duplex stainless steels form the latest family of stainless steels, tested as early as in the 1930’s and mass-produced from the 1970’s onwards. Their...

Nippon Yakin Kogyo: from strength to strength with high-performance alloys

Stainless Steel World Publisher -
For almost a century, Nippon Yakin Kogyo (Nippon Yakin) has produced stainless steel and high-end nickel alloys.

APERAM

Stainless Steel World Publisher -
This webinar focuses on duplex stainless steels and, more specifically, the advantages of using Lean Duplexes for water, wastewater treatment

Stainless in ABC: the examples multiply

Stainless Steel World Publisher -
Despite the recent disruption to the world economy caused by Covid-19, many governments have ambitious plans to boost infrastructure spending as economies grow and concerns about global warming stimulate interest in “smart” cities.

Hudson Yards: from railyard to riches

Stainless Steel World Publisher -
The largest private development in US history, Hudson Yards boasts a modern, sustainable design. Its prime location near the Hudson River in New York City comes at the price of exposure to both marine and de-icing salts. With corrosion resistance in mind, stainless steel emerges as an integral part of the mini-city, most notably in an interactive centerpiece called the “Vessel.”
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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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