Duplex 2205 2507 Stainless Steel Pipe

Duplex 2205 and Super Duplex 2507 Stainless Steel Pipe

Duplex 2205 pipe and Super duplex pipe are our strength product. Duplex steel is an austenite-ferrite dual phase stainless steel, it is developed for applications that demand high strength and corrosion resistance.  Duplex stainless steel pipe is a cost effective solution for many applications where the 300 series stainless steel pipe are susceptible to chloride stress corrosion cracking. Duplex 2205 and super duplex 2507 stainless steel pipe is an idea choice for the applications which require exceptional strength and corrosion resistance, such as chemical process, petrochemical, and seawater equipment. We supply duplex 2205 (S31803) and super duplex 2507 (S32750) pipe and tube according to ASTM A790, ASTM A789, EN 10216-5 etc.

duplex stainless steel pipes

duplex stainless steel pipes

What is Duplex Stainless Steel:

Duplex Stainless Steel (DSS) including duplex 2205(S31803) and super duplex, they are commonly consist of 50% ferrite and 50% austenite, and generally requires not less than 30%. Duplex stainless steel has good welding performance and high strength. Compared with austenitic stainless steel, it is about double yield strength from stainless steel 316, 317 etc., it make the equipment lighter and stronger. Duplex steel has very good resistance to localized corrosion and stress corrosion cracking. Duplex steel is not intended to be used at temperatures above 300°C due to embrittlement, the continuous use temperature is from -50 to 250 °C.

duplex stainless steel pipe

Duplex Steel Grade:

Duplex Stainlss Steel SAF 2205(UNS S32205, S31803), Super duplex SAF 2507 (UNS S32750), S32760, S32304 etc.

SAF 2205 is the most common grade for duplex stainless steel, ASME/ASTM grade is UNS S32205 or the similar grade S31803 , equivalent to EN/DIN 1.4462.

SAF 2507 is a super duplex steel, the ASTM grade is S32750, equivalent to EN/DIN 1.4410. We can supply super duplex pipes and fittings in high quality and fast delivery time.


What We Do for Duplex 2205 Pipe:

Our sister company is mainly focus on the manufacturing of duplex stainless steel pipe, with good experience and reliable quality control system. Nowadays, Kaysuns supplies both duplex stainless steel pipe and super duplex stainless steel pipes and tubes.

Super duplex 2507 pipe is a super duplex steel pipe with 25% chromium, 4% molybdenum, and 7% nickel. The common grade of super duplex steel is Saf 5027 / S32750, S32760, they have similar composition and mechanical properties. The high chromium, molybdenum, and nitrogen levels provide excellent resistance to pitting, crevice, and general corrosion. Compared to duplex stainless steel pipe, super duplex steel pipe SAF 2507 is highly resistant to uniform corrosion by organic acids such as formic and acetic acid.


Manufacturing of Duplex 2205 Stainless Steel Pipe

Cold drawn and cold rolled is the mainly process for seamless duplex stainless steel pipe. Due to the material characteristic of high strength and hardness, duplex steel is more difficult to process than austenitic steel. It is very easy to damage, especially for small thickness and large diameter pipes , it has a long and hard-working procedures, that's why the delivery time of duplex steel pipe is long.


Our Strength:

  • Supply both seamless and welded.
  • 10 years experience for fabrication and supplying.
  • Computer temperature controlled heat treatment facility.
  • Reliable based material vendor management.
  • Testing laboratory of NDT and PMI etc.
  • Mill certificate to EN10204 3.1/3.2.
  • Non-standard dimension fabrication and fast delivery time.


Dimension Welded: 1/2"~72" / 1.2mm~50mm Seamless: 3/8"~16" / SCH10S, 40S, STD, XS, SCH80S
Grade UNS S31803, S32205, S32750, S32760, S32304, 1.4462, 1.4410, 1.4501, 1.4362 etc.
Standard  ASTM A789, ASTM A790, EN10216-5, EN/DIN17455-2, EN17456-2etc.

Applications of Duplex Stainless Steel Pipes

  • Oil and gas industry equipment
  • Chemical process industries
  • Vessels and ship building
  • Offshore platforms
  • heat exchangers
  • process and service water systems
  • fire-fighting systems
  • injection and ballast water systems
  • Power industry FGD systems
  • Utility and industrial scrubber systems, absorber towers, ducting, and piping
  • Desalination plants, high pressure RO-plant and seawater piping
  • Mechanical and structural components, high strength, corrosion-resistant parts

Stainless Steel Pipes Catalog


Duplex Steel 2205
Super Duplex 2507
Stainless Steel Pipe Catalog
Dimension of Duplex Stainless Steel Pipes
ASTM SA789 -2010
ASTM SA790 -2010

*For more information about duplex/super duplex stainless steel pipe, please contact us.

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