MATERIAL KNOWLEDGE / SOCKET WELD FITTINGS
Duplex stainless steels combine austenitic and ferritic structures. They are considered where strength and corrosion resistance are both important to the design.
MATERIAL EXPLORER / DX
Explore three views of the material. These diagrams explain relationships; they do not represent a measured microstructure or predict performance.
Two phases
Austenite and ferrite are two structures found within duplex stainless steel. Their combination gives duplex its name and its distinct balance of strength and corrosion behaviour. Composition and fabrication affect the finished material, so the presence of two phases does not make every duplex grade identical.
The exact material and its condition remain part of the complete technical description.
Properties
No. Strength describes mechanical behaviour, while corrosion resistance describes interaction with the environment. Duplex combines useful strength with corrosion resistance that still varies by grade and exposure.
The exact material and its condition remain part of the complete technical description.
Fabrication
Duplex is a material family within stainless steel. Its selection should account for both service conditions and the requirements for the completed welded component.
The exact material and its condition remain part of the complete technical description.
01 / MATERIAL OVERVIEW
The term duplex describes the combination of austenite and ferrite in the steel. This family combines useful strength with corrosion resistance that varies by grade.
Duplex materials are used in applications including process equipment, water treatment and marine environments. Grade selection and the condition of the fabricated component remain important; the family name is not an application approval.
General background for the explanation above. The project specification governs the actual selection.
02 / MATERIAL KNOWLEDGE
Austenite and ferrite are two structures found within duplex stainless steel. Their combination gives duplex its name and its distinct balance of strength and corrosion behaviour. Composition and fabrication affect the finished material, so the presence of two phases does not make every duplex grade identical.
Super duplex belongs to the duplex family and retains its austenitic-ferritic structure. Higher alloying is developed for increased resistance in demanding corrosive environments.
Explore the related materialIt describes a steel structure containing both austenite and ferrite. Duplex is therefore a metallurgical description within the stainless-steel family.
No. Strength describes mechanical behaviour, while corrosion resistance describes interaction with the environment. Duplex combines useful strength with corrosion resistance that still varies by grade and exposure.
03 / SELECTION CONSIDERATIONS
Review the actual process medium and exposure, including temperature and contaminants.
The material structure and resulting properties are affected by welding. Use the applicable project fabrication requirements.
Provide the full duplex grade and specification rather than only the family name.
04 / FROM MATERIAL TO FITTING
Duplex is a material family within stainless steel. Its selection should account for both service conditions and the requirements for the completed welded component.
Material-family information is a starting point. Confirm the exact grade and application requirements with the project engineering team.
THERE IS MORE TO EXPLORE
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