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U.S. Department of Energy
Office of Scientific and Technical Information

Qualification of welded super 13%Cr martensitic stainless steels for the Sgard field

Conference ·
OSTI ID:696959
;  [1]; ; ;  [2]
  1. Statoil Research Center, Trondheim (Norway)
  2. SINTEF Materials Technology, Trondheim (Norway)
A test program was conducted to qualify welded super 13%Cr (S13%Cr) stainless steel for the Asgard Field, a mildly sour service. The test program involved girth welding, optimization of post weld heat treatment (PWHT) cycles, assessment of mechanical properties, examination of low cycle fatigue testing, and different corrosion testing and evaluation of S13%Cr steels from three different steel mills. The alloy with 0.015%C max, 11.9%Cr min, 2.4%Mo min and 6.O%Ni min, has been qualified for use as flowline material in the actual field. The results show acceptable weldability and corrosion properties. Post weld heat treatment (PWHT) of the welds improved the resistance against sulfide stress corrosion cracking.
OSTI ID:
696959
Report Number(s):
CONF-990401--
Country of Publication:
United States
Language:
English