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Welding of Duplex Stainless Steel


Jatandeep Singh , Netaji Subhas Institute of Technology, Dwarka, New Delhi, India; Nishant Goswami, Netaji Subhas Institute of Technology, Dwarka, New Delhi, India


Duplex stainless steel, Metallurgy, Precipitation mechanism, GTAW, GMAW


Duplex stainless steels are unrivalled in a large number of applications in the temperature range -50 ° C to 250 ° C where a combination of corrosion resistance and mechanical strength is required. The key to the unique properties is the duplex structure and the synergistic interaction between the two phases. Duplex stainless steels (DSS) have somewhat different welding requirements than those of the more familiar austenitic stainless steels. They also provide high immunity to stress corrosion cracking (SCC). The purpose of this paper is to give an overview of welding of DSS. The discussion includes the importance of balancing ferrite to austenite, reducing formation of deleterious intermetallic and non-metallic phases, effect of hydrogen on duplex stainless steel and measuring ferrite contents.

Other Details

Paper ID: IJSRDV1I4027
Published in: Volume : 1, Issue : 4
Publication Date: 01/07/2013
Page(s): 919-925

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