What are the corrosion resistance properties of Duplex steel tubes in various environments?

Duplex steel tubes exhibit excellent corrosion resistance properties making them suitable for various environments. They offer high resistance to general corrosion including pitting and crevice corrosion. Duplex stainless steel tubes have superior resistance to chloride induced stress corrosion cracking which is particularly beneficial in marine and chloride containing environments.

Duplex stainless steel tube supplier in India

Duplex tube

Can a Duplex stainless steel tube be welded easily? Are there any specific considerations for welding?

Duplex stainless steel tubes can be welded with ease, but specific considerations must be taken into account. It is essential to use compatible filler metals to ensure the integrity of the weld joint and maintain the desired mechanical properties. Preheating and post-weld heat treatment may be necessary to minimize the risk of precipitation of harmful phases and to achieve optimal corrosion resistance.

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Duplex stainless steel tube

Duplex stainless steel tube

Duplex tubing

Duplex tubing

Duplex seamless tube

Duplex seamless tube

What is the expected lifespan or durability of Duplex tubing in corrosive environments?

Duplex tubing exhibits excellent durability and a long lifespan in corrosive environments. Its unique microstructure provides a favorable combination of strength and corrosion resistance. In aggressive environments such as seawater, chemical processing and offshore applications Duplex tubing can outperform traditional stainless steels.

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Duplex steel tube specification

Duplex steel tube specification

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Types of Duplex tubing

DSS boiler tube

DSS boiler tube

  • Pipe Range : 1 / 2″ NB – 8″ NB
  • Outer Diameter : 6.0-630mm
  • Wall Thickness : 0.3mm – 50 mm

DSS superheater tubes

DSS superheater tubes

  • ASTM A790
  • ASME SA790

Duplex welded tube

Duplex welded tube

  • BA (Bright & Annealed)
  • Polished
  • AP (Annealed & Pickled)
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Duplex SS tube chemical composition

Duplex SS tube chemical composition

Mechanical properties of Duplex steel tube

Mechanical properties of Duplex steel tube

Duplex stainless steel tube equivalent

Duplex stainless steel tube equivalent

Duplex SS tube physical properties

Duplex SS tube physical properties

Duplex tubing pressure rating

Duplex tubing pressure rating

Can Duplex seamless tube be supplied with additional documentation, such as material test reports or inspection certificates?

Material test reports (MTRs) provide detailed information about the chemical composition mechanical properties and manufacturing process of the Duplex seamless tubes. Inspection certificates, such as certificates of compliance or conformity, verify that the tubes meet specified standards and requirements.

Can you provide information on the pitting and crevice corrosion resistance of DSS boiler tubes in chloride-containing environments?

DSS boiler tubes exhibit excellent pitting and crevice corrosion resistance in chloride-containing environments. The high chromium and molybdenum content in Duplex stainless steel (DSS) contributes to its superior resistance to localized corrosion. The duplex structure of the steel further enhances its ability to withstand corrosive attack.

How does the DSS superheater tube structure contribute to their resistance against stress corrosion cracking?

The structure of DSS superheater tubes plays a crucial role in their resistance against stress corrosion cracking (SCC). The duplex microstructure of Duplex stainless steel (DSS) provides inherent resistance to SCC. The balanced presence of ferrite and austenite phases in DSS superheater tubes helps to mitigate the formation and propagation of cracks under combined tensile stress and corrosive environments.