The UNS N09935 alloy with a minimum yield strength of 760 MPa (110 ksi) was successfully balloted in NACE MR0175/ISO 15156-3: 2003 based on SCC test results in a test environment much more severe than NACE Test Level V and on GHSC test results in NACE Test Level III. These results indicated the suitability of this material for sour service applications. Further to these findings, an R&D test programme has been implemented to investigate the corrosion resistance of UNS N09935 in more severe conditions, beyond 200 °C. Properties of this material and results of this test programme are herein presented and discussed.

Subject
Environmental cracking, Materials, Corrosion resistant alloys, Stainless alloys, Metal surfaces, Microstructure, Nickel based alloys, Corrosion cracking, C ring stress corrosion testing, Mechanical failure, Alloys, Yield strength, Stress corrosion cracking
Keywords:
935 alloy, UNS N09935, corrosion resistance, HPHT sour environment
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2011
Association for Materials Protection and Performance (AMPP)
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