CREEP RUPTURE PROPERTIES OF Ni-Cr-W ALLOYS FOR NUCLEAR STEEL MAKING IN HELIUM AND REDUCING GAS ATMOSPHERES.

Tatsuhiko Tanabe, Tatsuo Shikama, Yoshikazu Sakai, Masakazu Fujitsuka, Hiroshi Araki, Heitaro Yoshida, Ryoji Watanabe

Research output: Contribution to journalArticlepeer-review

Abstract

Creep rupture properties of Ni-Cr-W alloys developed for nuclear steelmaking, which precipitate alpha -W, were investigated in the temperature range from 900 degree C to 1050 degree C in He environment (He-2) which simulates the primary coolant of High Temperature Gas Cooled Reactor (HTGR), and at 900 degree C in reducing gas environment which is to be used when direct steelmaking system is connected with the primary system of the HTGR. The results were discussed in terms of environmental factors such as carburization, decarburization and oxidation. It was found that the two alloys have the possibility to satisfy the target of R & D, that is, 'the alloy should have the 50,000 hr rupture strength of more than 1 kg/mm**2'.

Original languageEnglish
Pages (from-to)246-253
Number of pages8
JournalTransactions of National Research Institute for Metals (Tokyo)
Volume27
Issue number4
Publication statusPublished - 1985 Dec 1

ASJC Scopus subject areas

  • Engineering(all)

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