This paper presents the results of the research activities of the subcommittee on hydrogen embrittlement of the Japan Pressure Vessel Research Council (JPVRC). The combined effect of temper embrittlement and hydrogen embrittlement in Cr-Mo steels is discussed. It has been recognized that Cr-Mo steels used widely in the refining and petrochemical industry are quite susceptible to temper embrittlement. Although the synergistic relation between temper embrittlement and hydrogen embrittlement is a matter of major concern, studies regarding this subject are rarely encountered. Task group VIII (TG8) of the JPVRC conducted fracture toughness tests for three kinds of 2.25Cr-1Mo steels and 2.25Cr-1Mo-0.3 V steel. These steels were prepared by subjecting them to normalizing, tempering, and postweld heat treatments (PWHTs) which simulated actual conditions. Some specimens were embrittled by step cooling (Socal-1 treatment). It was found that the threshold for hydrogen-induced fracture was lowered when the specimen was exposed to pressurized hydrogen gas (15 MPa) for 48 h at 450 °C and there was no marked indication of the synergistic action concerning this embrittlement.
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4-12-1, Nakanarusawa, Hitachi,
Ibaraki, 316-8511,
e-mail: 11ND202R@hcs.ibaraki.ac.jp
4-12-1, Nakanarusawa, Hitachi,
Ibaraki, 316-8511,
e-mail: konosu@mx.ibaraki.ac.jp
e-mail: tanaka-youichi@nstr.co.jp
1-1, Minamiwatarida-cho, Kawasaki-ku,
Kawasaki 210-0855,
e-mail: m-yuga@jfe-steel.co.jp
Minatomirai Grand Central Tower,
4-6-2, Minatomirai, Nishi-ku,
Yokohama 220-8765,
e-mail: hiroshiyamamoto@ykh.chiyoda.co.jp
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April 2013
Research-Article
Combined Effect of Temper and Hydrogen Embrittlement on Threshold for Hydrogen-Induced Fracture in Cr-Mo Steels
Hidenori Shimazu,
4-12-1, Nakanarusawa, Hitachi,
Ibaraki, 316-8511,
e-mail: 11ND202R@hcs.ibaraki.ac.jp
Hidenori Shimazu
Graduate School of Ibaraki University
,4-12-1, Nakanarusawa, Hitachi,
Ibaraki, 316-8511,
Japan
e-mail: 11ND202R@hcs.ibaraki.ac.jp
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Shinji Konosu,
4-12-1, Nakanarusawa, Hitachi,
Ibaraki, 316-8511,
e-mail: konosu@mx.ibaraki.ac.jp
Shinji Konosu
Ibaraki University
,4-12-1, Nakanarusawa, Hitachi,
Ibaraki, 316-8511,
Japan
e-mail: konosu@mx.ibaraki.ac.jp
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Yoichi Tanaka,
e-mail: tanaka-youichi@nstr.co.jp
Yoichi Tanaka
Nippon Steel Techno-Research
,Arde-Building-Higobashi
,9F 1-15-27, Edbori, Nishiku
,Osaka City, Osaka, 550-0002
, Japan
e-mail: tanaka-youichi@nstr.co.jp
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Masao Yuga,
1-1, Minamiwatarida-cho, Kawasaki-ku,
Kawasaki 210-0855,
e-mail: m-yuga@jfe-steel.co.jp
Masao Yuga
JFE Steel Corporation
,Steel Products Research Department
,1-1, Minamiwatarida-cho, Kawasaki-ku,
Kawasaki 210-0855,
Japan
e-mail: m-yuga@jfe-steel.co.jp
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Hiroshi Yamamoto,
Minatomirai Grand Central Tower,
4-6-2, Minatomirai, Nishi-ku,
Yokohama 220-8765,
e-mail: hiroshiyamamoto@ykh.chiyoda.co.jp
Hiroshi Yamamoto
Chiyoda Corporation
,Minatomirai Grand Central Tower,
4-6-2, Minatomirai, Nishi-ku,
Yokohama 220-8765,
Japan
e-mail: hiroshiyamamoto@ykh.chiyoda.co.jp
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Naotake Ohtsuka
Naotake Ohtsuka
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Hidenori Shimazu
Graduate School of Ibaraki University
,4-12-1, Nakanarusawa, Hitachi,
Ibaraki, 316-8511,
Japan
e-mail: 11ND202R@hcs.ibaraki.ac.jp
Shinji Konosu
Ibaraki University
,4-12-1, Nakanarusawa, Hitachi,
Ibaraki, 316-8511,
Japan
e-mail: konosu@mx.ibaraki.ac.jp
Yoichi Tanaka
Nippon Steel Techno-Research
,Arde-Building-Higobashi
,9F 1-15-27, Edbori, Nishiku
,Osaka City, Osaka, 550-0002
, Japan
e-mail: tanaka-youichi@nstr.co.jp
Masao Yuga
JFE Steel Corporation
,Steel Products Research Department
,1-1, Minamiwatarida-cho, Kawasaki-ku,
Kawasaki 210-0855,
Japan
e-mail: m-yuga@jfe-steel.co.jp
Hiroshi Yamamoto
Chiyoda Corporation
,Minatomirai Grand Central Tower,
4-6-2, Minatomirai, Nishi-ku,
Yokohama 220-8765,
Japan
e-mail: hiroshiyamamoto@ykh.chiyoda.co.jp
Naotake Ohtsuka
Contributed by the Pressure Vessel and Piping Division of ASME for publication in the Journal of Pressure Vessel Technology. Manuscript received March 30, 2012; final manuscript received November 22, 2012; published online March 18, 2013. Assoc. Editor: David L. Rudland.
J. Pressure Vessel Technol. Apr 2013, 135(2): 021406 (7 pages)
Published Online: March 18, 2013
Article history
Received:
March 30, 2012
Revision Received:
November 22, 2012
Citation
Shimazu, H., Konosu, S., Tanaka, Y., Yuga, M., Yamamoto, H., and Ohtsuka, N. (March 18, 2013). "Combined Effect of Temper and Hydrogen Embrittlement on Threshold for Hydrogen-Induced Fracture in Cr-Mo Steels." ASME. J. Pressure Vessel Technol. April 2013; 135(2): 021406. https://doi.org/10.1115/1.4023423
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