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Duplex Stainless Steel Pipe

Short Description:

Product: Stainless steel welded pipe, stainless steel erw pipe, stainless steel efw pipe
Application: In Petroleum, Aerospace, Chemical, Power, Boilers, Military Industry
Size:OD: 2″ – 48″WT: 5S, 10S, STD, XH, 40, 80, 100, 120, 160, XXH
LENGTH: Single Random, Double Random, Cut Length max to 23m
Standard: ASTM A789,ASTMA790,ASTMA928
Grades: UNS S31803, UNS S32205, UNS S31500, UNS S32304,UNS S32750, UNS S32760
Surface: Annealed, Pickling, Polished
Packing: Waterproof Paper Wrapped, Packed in Wooden Cabins

Product Description


Manufacturing Technique


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Introduction of Duplex Stainless Steel Pipe:

Duplex stainless steel is a very useful metal that is used the world over. It gets its name from the fact that it consists of two different grades of metal.
Essentially, Duplex is a Fe-Ni-Cr alloy that has a two-phase ferritic-austenitic stainless-steel microstructure when it is at room temperature.

Duplex steels are characterised by high chromium (19–28%) and molybdenum (up to 5%) and lower nickel contents than austenitic stainless steels. The most used duplex stainless steels are the 2205 (22% Chromium, 5% Nickel) and the 2507 (25% Chromium, 7% Nickel); 2507 is known as “super duplex” due to its higher resistance to corrosion.

The advantage of combining ferritic and austenitic grades is that the resultant metal has a metallurgical structure that consists of two phases and therefore benefits from the properties of both microstructures.
These properties make duplex steel highly sought after in heavy industries, like oil and gas nuclear and chemical processing.

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    Grades C≤ Mn≤ Si≤ S≤ P≤ Cr Ni Mo Cu≤ N
    S32750((SAF2507) 0.03 1.2 0.8 0.02 0.035 24.0/ 6.0/ 3.0/ 0.5 0.24/
    00Cr22Ni7Mo4N 26 8 5 0.32
    S31803(SAF2205) 0.03 2 1 0.02 0.03 21.0/ 4.50/ 2.50/ 0.08/
    00Cr22Ni5Mo3N 23 6.5 3.5 0.2
    S31500(3RE60) 0.03 1.2/ 1. 4/ 0.03 0.03 18.0/ 4.25/ 2.50/ 0.05/
    00Cr18Ni5Mo3Si2 2 2 19 5.25 2 0.1


    Heat treatment temperature/℃ Ab(MPa)≥ As(MPa)≥ ∮≥ Brudzinski Rockwell
    S32750(SAF2507) 1025-1125 800 550 15 310 32
    S31803(SAF2205) 1020-1100 620 450 25 290 30.5
    S31500(3RE60) 980-1040 630 440 30 290 30.5


    Manufacturing Technique Of Duplex Stainless Steel Pipe


    Applications of Duplex Stainless Steel Pipe
    The extensive benefits of Duplex stainless steel mean that it can be used in many different applications such as:

    •Chemical processing, transport and storage
    •Pipes for production and transportation of oil and gas
    •Oil and gas exploration and offshore rigs
    •Oil and gas refining
    •Marine environments
    •Pollution control equipment
    •Pulp & paper manufacturing
    •Chemical process plant
    •Structural and mechanical components
    •Heat exchangers
    •Cooling pipes

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