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.

Cost-saving super duplex

IMOA shows why 2507 Super Duplex stainless steel was chosen as the best option to replace a sintering facility exhaust stack

Sassda revives sought-after awards in 60th anniversary

Celebrate Sassda's 60th Anniversary with the return of the Sassda & Columbus Stainless Steel Awards, honoring stainless steel excellence.

Alleima introduces a super-duplex alloy: SAF™ 3006

Alleima's SAF™ 3006: High-alloy duplex steel enhances corrosion resistance in harsh environments.

WELTEC BIOPOWER supports biomethane project

According to the Spanish trade association Sedigas, up to 163 terawatt hours of biomethane could be produced if all available sources were used consistently

Uremium29: the complete solution for urea plants

UREMIUM29 is a super duplex stainless steel specifically designed for use in the most demanding high-pressure sections of urea plants, such as the stripper.

Welding filler metals

Stainless steel is used for many of the welded components in a nuclearfacility, including piping and pressure vessels.

Largest Ultra-Low Energy urea plant planned for China

Stamicarbon has signed a contract covering the process design package, licensing and equipment supply for a grassroots urea plant in Jiangxi province, China. The...

Schunk uses BUMAX DX 129 for ultrasonic welding

Schunk Sonosystems decides to use BUMAX DX 129 screws for all its ultrasonic welding flexure sonotrode products to further improve quality and reliability.

Super duplex in carbon capture storage plants

Global leaders are trying to regain momentum on climate change to pivot from negotiating to implementing the massive transformations required.

Stamicarbon secures license pact in Sub-Saharan Africa

Stamicarbon has secured a second license contract for an identical capacity and design plant.

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.