Table Of Content
What Is Duplex 2205?
It is a nitrogen base excellent duplex stainless steel alloy. It describes a family of fully austenitic stainless steel such as 304 stainless. Duplex 2205 stainless steel looks like austenite pools surrounded by a continuous ferrite phase. These steel contain annealed condition with approximately half percent ferrite. The grade is the most widely used in the duplex family of stainless steel. The combination of chromium, molybdenum, and nitrogen conveys the excellent resistance of the 2205-grade pipe.
What are the benefits of Duplex 2205?
The benefit of a duplex structure is that it combines the excellent quality of a ferritic alloy with stress corrosion cracking resistance and high strength. Also, it has an austenitic alloy that is easy to fabricate and has excellent corrosion resistance. The duplex stainless steel is a cost-effective solution for many applications where stainless steel is susceptible to chloride stress corrosion cracking. Usually, this stress corrosion cracking occurs when stainless steel is subjected to tensile stress while in contact with solutions containing chlorides. Also, it increases the temperature and susceptibility of stainless steel to stress corrosion cracking.
Why we used Duplex 2205 Pipes?
The resistance of Duplex 2205 grade is significant for services such as marine environments, brackish water, bleaching operations, closed-loop water systems, and food processing applications. The high chromium, molybdenum, and nitrogen content of 2205 alloy provide superior corrosion resistance to conventional stainless steels. These elements also offer high resistance to pitting and crevice corrosion, even in oxidizing and acidic solutions. Grade 2205 shows superior breakdown as compared to 317L stainless steel. This alloy has excellent corrosion resistance to seawater and most concentrations of sulphuric acid. In addition, it has resistant to sulfide stress corrosion cracking. It is used in oil field piping.
|Specifications||ASTM A790, A928 / ASME SA790, SA928|
|Dimensional specification||ANSI/ASME B36.19M, ANSI/ASME B36.10M|
|Seamless / Welded Pipe Size||1 / 8″ NB – 24″ NB|
|EFW Pipe Size||6″ NB – 48″ NB|
|Outside Diameter||6.00 mm OD up to 914.4 mm OD, Sizes up to 24” NB available Ex-stock, OD Size Steel Tubes available Ex-stock|
|Manufacturing Shapes||Hydraulic, Round, Rectangle, Square, Hex, Honed|
|Manufacturing Techniques||Seamless / Welded / ERW / Fabricated / CDW / 100% X Ray Welded|
|Schedule Thickness Range||SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS|
|Pipes End Types||Plain End, Beveled End, Treaded One End, TBE (Treaded Both Ends)|
|Delivery Condition of Pipe||Annealed and Pickled, Polished, Bright Annealed, Cold Drawn|
|Surface Finish||No.1, No.4, No.8 Mirror Finish, 2B|
|Value Added Services||Cutting, Beveling, Polishing, Threading, Destructive, Non Destructive, Ultrasonic Testing|
|Duplex 2205||1.4462||S31803 / S32205|
|S31803||0.030 max||2 max||1 max||0.030 max||0.020 max||22 – 23||3 – 3.50||4.50 – 6.50||0.14 – 0.20||Bal|
|S32205||0.030 max||2.00 max||1.00 max||0.030 max||0.020 max||21.0 – 23.0||2.50 – 3.50||4.50 – 6.50||0.8 – 0.20||63.54 min|
|Density||Melting Point||Tensile Strength||Yield Strength (0.2%Offset)||Elongation|
|7.8 g/cm3||1350 °C (2460 °F)||Psi – 116000 , MPa – 800||Psi – 80000 , MPa – 550||15 %|