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11113 Corrosion Resistance of UNS N09935 in High Pressure High Temperature Sour Environments

Product Number: 51300-11113-SG
ISBN: 11113 2011 CP
Author: Rashmi B. Bhavsar, Luca Foroni and Carlo Malara
Publication Date: 2011
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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.

Key words: 935 alloy, UNS N09935, corrosion resistance, HPHT sour environment
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.

Key words: 935 alloy, UNS N09935, corrosion resistance, HPHT sour environment
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