Measurements were made of the full-thickness crack arrest fracture toughness (FTCAT) of three 9-percent Ni steels having the range of thicknesses and Charpy V-notch toughnesses of plates now in LNG storage tank service. Unlike the plates used in large pressure vessels, these thinner plates do not crack under a condition of plane strain, so that test method ASTM E1221 “Standard Test Method for Determining Plane-Strain Crack-Arrest Fracture Toughness, Kla, of Ferritic Steels,” was modified for these tests. The toughness of all three steels was measured at liquid nitrogen temperature (−196C), but two of the three were too tough to be measured at LNG storage temperature (−162C). Even the least tough plate had a high enough toughness to arrest long cracks in LNG storage service.
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August 1991
Research Papers
Full-Thickness Crack Arrest Fracture Toughness of 9-Percent Ni (ASTM 553, Type 1) Steels
E. J. Ripling
,
E. J. Ripling
Materials Research Laboratory, Inc., Glenwood, IL 60425
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P. B. Crosley
P. B. Crosley
Materials Research Laboratory, Inc., Glenwood, IL 60425
Search for other works by this author on:
E. J. Ripling
Materials Research Laboratory, Inc., Glenwood, IL 60425
P. B. Crosley
Materials Research Laboratory, Inc., Glenwood, IL 60425
J. Pressure Vessel Technol. Aug 1991, 113(3): 375-379 (5 pages)
Published Online: August 1, 1991
Article history
Received:
August 20, 1990
Revised:
March 22, 1991
Online:
June 17, 2008
Citation
Ripling, E. J., and Crosley, P. B. (August 1, 1991). "Full-Thickness Crack Arrest Fracture Toughness of 9-Percent Ni (ASTM 553, Type 1) Steels." ASME. J. Pressure Vessel Technol. August 1991; 113(3): 375–379. https://doi.org/10.1115/1.2928769
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