Slow strain rate testing of corrosion resistant alloys in high temperature H{sub 2}S environments
- VTT Manufacturing Technology, Espoo (Finland)
- Helsinki Univ. of Technology, Espoo (Finland). Lab. of Engineering Materials
To evaluate the effects of manufacturing method and contents of alloying elements on sulfide stress cracking (SSC) behavior, powder metallurgically (PM) produced and wrought super austenitic stainless steels (UNS S32654) and nickel-base alloy UNS N06625 (PM) were studied in high temperature H{sub 2}S solutions by using slow strain rate tests (SSRT). Attention was paid also to the effects of strain rate on SSC susceptibility of the studied stainless steels. The testing environments were selected based on the proposed, but not yet approved NACE standard test method. According to the SSRT results the studied super austenitic stainless steels showed brittle fracture behavior in all of the studied aggressive H{sub 2}S solutions. The partial pressures of hydrogen sulfide and carbon dioxide used were over 14 bar. The studied nickel-base alloy was not susceptible to SSC even in H{sub 2}S solution when the partial pressure of H{sub 2}S was 70 bar and the partial pressure of CO{sub 2} was 50 bar.
- OSTI ID:
- 504774
- Report Number(s):
- CONF-970332--
- Country of Publication:
- United States
- Language:
- English
Similar Records
Alternative for evaluating sour gas resistance of low-alloy steels and corrosion-resistant alloys
Development of high strength SSC-resistant low alloy steel for OCTG