Interlaboratory testing of seven alloys for SSC resistance by the double cantilever beam method
- ERIM Transportation and Energy Materials Center, Ann Arbor, MI (US)
The paper reports that alloys for deep sour gas wells were evaluated for sulfide stress cracking resistance by the double cantilever beam (DCB) method. Representatives of 20 laboratories participated in one or both of two round-robin testing programs. These were conducted in support of the successful effort to include the DCB test in an expanded NACE test method, TM0177-90 (D). Test materials included cast and wrought products, low-alloy and stainless steels, and nonferrous alloys. The test result reveal generally minor variation of Kissc within data sets from individual laboratories but rather high variation between laboratories. This latter variation is greatest for the two cast alloys and lowest for wrought stainless, Ni- and Ti- base alloys. The variation between laboratories for c-90 is attributed mainly to differences in initial arm displacement; on average, Kissc rises approximately 0.2 ksi in. per 0.001-in. increase in arm displacement. At fixed arm displacement, the DCB test for C-90 exhibits good reproducibility with a precision of 1.34 ksi in. (4%) or better.
- OSTI ID:
- 7238135
- Journal Information:
- Corrosion (Houston); (United States), Vol. 48:2; ISSN 0010-9312
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
03 NATURAL GAS
NATURAL GAS WELLS
MATERIALS TESTING
NICKEL BASE ALLOYS
STRESS CORROSION
STAINLESS STEELS
SULFIDES
CORROSIVE EFFECTS
TITANIUM BASE ALLOYS
CRACK PROPAGATION
FRACTURE MECHANICS
ALLOYS
CHALCOGENIDES
CHEMICAL REACTIONS
CORROSION
HIGH ALLOY STEELS
IRON ALLOYS
IRON BASE ALLOYS
MECHANICS
NICKEL ALLOYS
STEELS
SULFUR COMPOUNDS
TESTING
TITANIUM ALLOYS
WELLS
360105* - Metals & Alloys- Corrosion & Erosion
030300 - Natural Gas- Drilling
Production
& Processing
360103 - Metals & Alloys- Mechanical Properties