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 synergetic 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-0.3V steel. These steels were prepared by subjecting them to normalizing, tempering and post-weld heat treatments 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 (15MPa) for 48 hours at 450 °C and there was no marked indication of the synergetic action concerning this embrittlement.
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ASME 2012 Pressure Vessels and Piping Conference
July 15–19, 2012
Toronto, Ontario, Canada
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-5505-8
PROCEEDINGS PAPER
Combined Effect of Temper and Hydrogen Embrittlement on Threshold for Hydrogen–Induced Fracture in Cr-Mo Steels
Hidenori Shimazu,
Hidenori Shimazu
Ibaraki University, Hitachi, Ibaraki, Japan
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Shinji Konosu,
Shinji Konosu
Ibaraki University, Hitachi, Ibaraki, Japan
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Yoichi Tanaka,
Yoichi Tanaka
Nippon Steel Techno-Research, Osaka, Osaka, Japan
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Masao Yuga,
Masao Yuga
JFE Steel Corporation, Kawasaki, Japan
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Hiroshi Yamamoto,
Hiroshi Yamamoto
Chiyoda Advanced Solutions Corp., Yokohama, Japan
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Naotake Ohtsuka
Naotake Ohtsuka
Mu Ltd., Ohtsu, Japan
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Hidenori Shimazu
Ibaraki University, Hitachi, Ibaraki, Japan
Shinji Konosu
Ibaraki University, Hitachi, Ibaraki, Japan
Yoichi Tanaka
Nippon Steel Techno-Research, Osaka, Osaka, Japan
Masao Yuga
JFE Steel Corporation, Kawasaki, Japan
Hiroshi Yamamoto
Chiyoda Advanced Solutions Corp., Yokohama, Japan
Naotake Ohtsuka
Mu Ltd., Ohtsu, Japan
Paper No:
PVP2012-78448, pp. 825-833; 9 pages
Published Online:
August 8, 2013
Citation
Shimazu, H, Konosu, S, Tanaka, Y, Yuga, M, Yamamoto, H, & Ohtsuka, N. "Combined Effect of Temper and Hydrogen Embrittlement on Threshold for Hydrogen–Induced Fracture in Cr-Mo Steels." Proceedings of the ASME 2012 Pressure Vessels and Piping Conference. Volume 6: Materials and Fabrication, Parts A and B. Toronto, Ontario, Canada. July 15–19, 2012. pp. 825-833. ASME. https://doi.org/10.1115/PVP2012-78448
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