Effect of Hydrogen on Brittle-Ductile Transition of COR-TEN O and its Weld Material (1st Report, Brittle-Ductile Transition of COR-TEN O)

Takao Utsunomiya, Katsuhiko Watanabe

Research output: Contribution to journalArticle


Storage tanks and pipelines of gaseous fuel are frequently installed in low temperature environ-ment. So, when gaseous fuel contains hydrogen, not only cryogenic embrittlement but also hydrogen embrittlement may occur in the equipments. In this report, the effect of hydrogen on brittle-ductile transition of COR-TEN O steel was studied by carrying out fracture experiments of hydrogen charged and non-charged materials over the temperature range from — 196°C to room temperature. The variations of fracture resistance expressed by CED with temperature for hydrogen charged and non-charged materials are compared. As the result, it is shown that the brittle-ductile transition temperature of hydrogen charged material is lower than that of non-charged one and, although the fracture resistance of charged material naturally becomes smaller in the upper shelf range, not the fracture resistance of non-charged material but that of charged one is a little bit larger in the brittle-ductile transition range.

Original languageEnglish
Pages (from-to)1395-1401
Number of pages7
JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Issue number736
Publication statusPublished - 2007 Jan 1



  • Brittle-Ductile Transition
  • CED (Crack Energy Density)
  • Fracture Mechanics
  • Fracture Resistance
  • Hydrogen Embrittlement

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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