FERRITIC-AUSTENITIC DUPLEX STAINLESS STEELS WITH IMPROVED MATERIAL AND WORKING PROPERTIES

The influence of high nitrogen contents on duplex stainless steel UNS S 31803 in welded and unwelded conditions was investigated. As a consequence of decreasing the amount of ferrite with increasing nitrogen content, tensile strength and pitting corrosion resistance of the base material are increased. High nitrogen content decreases the influence of the cooling rates on the microstructure after welding and on the resistance to pitting corrosion of heat affected zones. Thus, the material becomes less sensitive to welding with low heat input, allowing thicker cross sections to be welded without preheating.

• Supplemental Notes:
  • ISOPE 91, 1st Intnl Offshore & Polar Engng Conference; 11-16 Aug 1991; Edinburgh, U.S. Sponsored by Intl Soc Offshore & Polar Engrs (ISOPE) et al. Procs. Publ by ISOPE, ISBN 0-9626104-61, Vol IV, p 233 [5 p, 4 ref, 4 tab, 6 fig]
• Authors:
  • Dohnke, R
  • Gillessen, C
• Publication Date: 1991

Language

• English

Subject/Index Terms

• TRT Terms: Mechanical properties; Stainless steel; Welding
• Uncontrolled Terms: Weldability
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00702914
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM