Linee Guida pratiche per la lavorazione di acciai inossidabili austeno - ferritici (duplex). Saldatura degli acciai duplex.

This article is extract from the publication "Practical Guidelines for the Fabrication of Duplex Stainless Steels", first edition 2011, published by the International Molybdenum Association (IMOA). More in detail, the focus is on the Chapter 12 "Welding Duplex Stainless Steels", where the Authors present an updated overview concerning the most relevant issues, such as the differences existing in welding between the conventional austenitic stainless steels and the duplex ones, the selection and the fine tuning of the welding processes and the related procedures, the suggested joint preparations, the proper interpass temperature and heat input to set-up for getting a proper final phase balance, the selection of the filler material as a function of the base material and the expected weld performances. The article gives also a detailed analysis on the applicable non-arc welding and joining processes, without forgetting the post fabrication clean-up procedures, which are often critical for the performance of the welded product in service conditions, such as the corrosion resistence. The staff of Rivista Italiana della Saldatura is grateful to IMOA for the permission given to the publication of the Italian translation of this extract. [ABSTRACT FROM AUTHOR]