A Simple Guide to Duplex Stainless Steel Pipes

Bunch Of Stainless Steel Seamless Pipe

Stainless Steel has been a prime choice industry-wide for a plethora of applications due to its incredible mechanical and physical properties including the brilliant resistance it offers against corrosive media and environments. Altering the composition and addition new elements to the alloy led to the discovery of various grades of Stainless Steel with enhanced properties and functionalities. The types of stainless steel discovered were:

  • Austenitic
  • Ferritic
  • Martensitic
  • Precipitation Hardened
  • Duplex and Super Duplex.

In this blog we will run through the description, making, benefits, and applications of Duplex Stainless Steel and why it is the most in-demand material in the market.

Duplex Stainless Steel- Description and overview:

Duplex stainless steel was discovered when industrialists and engineers found the need for a material with incredible strength mixed with great corrosion resistivity. This was achieved through the revelation of Duplex Stainless steel. Duplex SS has a dual microstructure consisting of ferritic and austenitic properties where the mechanical properties depend on the ferritic half and corrosion resistivity comes from the austenitic components such as molybdenum.

What are the various types of Duplex SS available?

  • Lean Duplex: UNS S32304
  • Duplex: UNS S31803 and UNS S32205
  • Super Duplex: UNS S32750
  • Hyper Duplex: UNS S32707

Listed below are the properties exhibited by UNS S32205 Duplex Steel Seamless Pipes which make it an industry-leading metal alloy:

  • Resists Corrosion:

As mentioned earlier, Duplex Stainless Steel has superior corrosion resistance due to its austenite microstructural phase. The corrosion resistivity is a result of the chromium paired with molybdenum. Duplex Stainless steel can withstand and repel crevice, pitting, stress cracking, chloride, and all general corrosive environments.

  • Strength:

The ferritic micro structural phase of Duplex SS enhances its mechanical strength making it one of the strongest SS alloys available. Duplex SS is highly malleable and its strength permits it to be beaten up to extremely thin sheets without loss of strength and durability.

  • Weldability:

It is fairly tricky to weld Duplex Stainless Steel. The welding process should be carried out under strict monitoring by highly skilled professionals to avoid mishaps.

Where is SS Duplex Products used?

  • Chemical industry
  • Oil and Gas equipment
  • Marine industry
  • Shipbuilding
  • Paper and pulp manufacturing
  • Cargo Equipment
  • Food Processing
  • Biofuel and power plants

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