Creep Properties of Hastelloy-X Alloy for the High Temperature Gas-Cooled Reactor


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The creep properties for the Hastelloy-X alloy which is one of candidate alloys for a high temperature gas-cooled reactor are presented. The creep data was obtained with different stresses at 950oC, and a number of the creep data was collected through literature surveys. All of the creep data were combined together to obtain the creep constants and to predict a long-term creep life. In the Norton’s creep law and the Monkman-Grant relationship, the creep constants, A, n, m, and m’ were obtained. Creep master curves based on the Larson-Miller parameter were presented for the standard deviations of 1σ, 2σ and 3σ. Creep life at each temperature was predicted for a longer-time rupture above 105 hours. Failure probability was also estimated by a statistical process of all the creep rupture data.



Key Engineering Materials (Volumes 326-328)

Edited by:

Soon-Bok Lee and Yun-Jae Kim




W. G. Kim et al., "Creep Properties of Hastelloy-X Alloy for the High Temperature Gas-Cooled Reactor", Key Engineering Materials, Vols. 326-328, pp. 1105-1108, 2006

Online since:

December 2006




[1] K. Hada, I. Nishiguchi, Y. Muto and H. Tsuji: Nuclear Eng. and Design, Vol. 132(1991), p.1.

[2] ANL Report, Materials Behavior in HTGR Environments, NUREG/CR-6824 ANL-02/37(2002).

[3] Y. Muto, H. Nakajima and M. Eto: Nuclear Engineering Design, 144 (1993), p.305.

[4] T. Nakanishi and H. Kawakami: Nuclear Technology, Vol. 66 (1984), p.273.

[5] European Alloy-DB, Licensed CD, European -Joint Research Centre (EU-JRC).

[6] JAERI Report, JAERI-M-89-005 (1989), p.32.

[7] Haynes International, www. haynesintl. com, Hastelloy-X Alloy, H-3009A (1997).

[8] Special Metals, www. specialmetals. com, Inconel Alloy HX, SMC-007(2004).

[9] Y. Kurata and H. Nakajima: Journal Nuclear Materials, Vol. 228(1996), p.176.