Comparison Between Hot Rolled and PM/HIP Processed Duplex Stainless Steel UNS S31803

  • J. V. S. Matias
  • H. M. L. F. de Lima
  • W. S. Araujo
  • J. M. Pardal
  • Sérgio S. M. TavaresEmail author
Part of the Advanced Structured Materials book series (STRUCTMAT, volume 98)


Duplex stainless steels (DSS) are corrosion resistant alloys (CRA) which became largely employed due to its excellent combination of high strength, pitting corrosion resistance and toughness. The steel with basic composition 21.0–23.0%Cr, 4.5–6.5%Ni, 2.5–3.5%Mo, 0.08–0.20%N was developed in the 1980s and became the most popular DSS used in the oil and gas industry. The mechanical properties and corrosion resistance are optimized with a microstructure containing equal parts of ferrite (δ) and austenite (γ). This balanced microstructure is obtained by the chemical composition control and heat treatment. A solution treatment at 1050–1100 °C followed by water cooling is recommended. Although other heat treatments are not common in DSS, a significant hardening effect can be obtained by short duration exposition to 475 °C. Long thermal aging in the 350–550 °C interval has been extensively studied by many authors, and was proved to cause embrittlement and decrease of corrosion resistance, due to spinodal decomposition of ferrite into Cr-rich (α′) and Cr-depleted (α″) regions. However, a heat treatment at 475 °C for 4 h or 8 h may increase the yield and ultimate tensile strength without significant decrease of toughness and corrosion resistance, as observed previously. The goal of this work is to compare the microstructure, mechanical properties and corrosion resistance of two duplex stainless steels with similar composition, but produced by different methods: hot rolling and powder metallurgy PM/HIP. These two fabrication processes may be concurrent for some applications, such as manifolds in the oil and gas industry. The response of both materials to short duration aging at 475 °C was compared.


Duplex stainless steel HIP process 475 °C aging 



Authors are grateful to Brazilian Research Agencies CAPES, FAPERJ and CNPq.


  1. 1.
    Gunn, R.N.: Duplex Stainless Steels. Microstructure, Properties and Applications. Abington Publishing, Cambridge (2003)Google Scholar
  2. 2.
    Alvarez-Armas, I., Degallaix-Moreuil S.: Duplex Stainless Steels. ISTE Ltd and Wiley, London, England (2009)Google Scholar
  3. 3.
    Sahu, J.K., Krupp, U., Ghosh, R.N., Christ, H.-J.: Effect of 475 °C embrittlement on the mechanical properties of duplex stainless steel. Mater. Sci. Eng. A 508, 1–14 (2009)CrossRefGoogle Scholar
  4. 4.
    Hättestrand, M., Larsson, P., Chai, G., Nilsson, J.O., Odqvist, J.: Study of decomposition of ferrite in a duplex stainless steel cold worked and aged at 450–500 °C. Mater. Sci. Eng. A 499, 489–492 (2009)CrossRefGoogle Scholar
  5. 5.
    Tavares, S.S.M., Terra V.F., de Lima Neto, P., Matos D.E.: Corrosion resistance evaluation of the UNS S31803 duplex stainless steels aged at low temperatures (350 to 550 °C) using DLEPR tests. J. Mater. Sci. 40, 4025–4028 (2005)Google Scholar
  6. 6.
    Weng, K.L., Chen, H.R., Yang, J.R.: The low-temperature aging embrittlement in a 2205 duplex stainless steel. Mater. Sci. Eng. A 379, 119–132 (2004)CrossRefGoogle Scholar
  7. 7.
    Loureiro, A., da Costa, V.C., Pardal, J.M., Montenegro, T.R., Tavares, S.S.M.: Influence of heat treatments at 475 °C and 400 °C on the pitting corrosion resistance and sensitization of UNS S32750 and UNS S32760 superduplex stainless steels. Mater. Corros. 63, 522–526 (2012)Google Scholar
  8. 8.
    Tavares, S.S.M., Pardal, J.M., Abreu, H.F.G., Nunes, C.S., da Silva, M.R.: Tensile properties of duplex UNS S32205 and lean duplex UNS S32304 steels and the influence of short duration 475 °C aging. Mater. Res. 15, 859–864 (2012)CrossRefGoogle Scholar
  9. 9.
    ASTM International: ASTM G150—Standard Test Method for Electrochemical Critical Pitting Temperature Testing of Stainless Steels. West Conshohocken, PA (2013)Google Scholar
  10. 10.
    ASTM International: ASTM E23-16b—Standard Test Methods for Notched Bar Impact Testing of Metallic Materials. West Conshohocken, PA (2016)Google Scholar
  11. 11.
    Norsok Standard: Norsok Standard M-601—Welding Specification of piping. Standards Norway, Lysaker (2016)Google Scholar
  12. 12.
    Straffelini, G., Fontanari, V., Molinari, A.: Impact fracture toughness of porous alloys between room temperature and −60 °C: Mater. Sci. Eng. A 272, 389–397 (1999)Google Scholar
  13. 13.
    Nascimento, A.M., Ierardi, M.C.F., Kina, A.Y., Tavares, S.S.M.: Pitting corrosion resistance of cast duplex stainless steels in 3.5% NaCl solution. Mater. Charact. 59, 1736–1740 (2008)Google Scholar
  14. 14.
    Alonso-Falleiros, N., Hakim, A., Wolynec, S.: Comparison between potentiodynamic and potentiostatic tests for pitting potential measurement of duplex stainless steels. Corrosion 55, 443–448 (1999)CrossRefGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • J. V. S. Matias
    • 1
  • H. M. L. F. de Lima
    • 2
  • W. S. Araujo
    • 2
  • J. M. Pardal
    • 3
    • 4
  • Sérgio S. M. Tavares
    • 3
    • 4
    Email author
  1. 1.Instituto Federal Fluminense, Campus São João da Barra, Núcleo de Ciência e Tecnologia dos MateriaisSão João da BarraBrazil
  2. 2.Departamento de Engenharia MetalúrgicaUniversidade Federal do CearáFortalezaBrazil
  3. 3.Departamento de Engenharia MecânicaUniversidade Federal FluminenseNiteróiBrazil
  4. 4.Centro Federal de Educação Tecnológica Celso Suckow da FonsecaMaracanã, Rio de JaneiroBrazil

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