While duplex stainless steels are strong and versatile materials, they need to be treated with respect during welding. At Duplex World 2021 (24 & 25 February, RDM Rotterdam, the Netherlands), two separate sessions will cover this important topic.
An interactive workshop on 24 Feb, titled ‘Welding & special treatments’ will begin with a discussion of duplex/ super duplex GTAW pipe welding. Topics include the management of welding parameters, conforming to standards and client specifications, and technical requirements (corrosion, ferrite content, hardness, tensile, microstructure, etc. This will be followed by two technical presentations; the first will look at the effect of welding parameters on the microstructure of weldments of a newly developed duplex stainless steel (UNS S82551). The second will compare different process variants of submerged arc welding of duplexes with additional cold wire.
A technical paper session on 25 Feb ‘Welding duplex stainless steel’ will consider the interaction of alloying elements and welding parameters, which offer a variety of exciting effects on microstructure and weld integrity of duplexes. Three presentations cover: Laser pulsed welding – effect of the welding process on the microstructure of the UNS S31803; Appropriate welding approach of super duplex 25%Cr seamless pipes for subsea applications – the effect of alloying elements and modus operandi; and finally, a parametric study on TIG weldability of cold-rolled Aperam DX2507 super duplex.
Duplex World is held in parallel to Heat Exchanger World Europe; one ticket gives access to both events. To view the full two-day conference program and exhibitor list, and for general information, see www.duplex-world.com/duplexworld2021/