Hitachi, Ltd.

Hitachi Metals, Ltd.

Yasuhiko Mori

Isao Masaoka

Shigeo Hattori

Hisao Itow

Ryoichi Sasaki

Rikizo Watanabe

A member adapted for use under a stress in an atmosphere of a temperature below the creep temperature and made from an Ni base alloy having a high resistance to stress corrosion cracking. The Ni alloy consists essentially of, by weight, 15 to 25% of Cr, 1 to 8% of Mo, 0.4 to 2% of Al, 0.7 to 3% of Ti, 0.7 to 4.5% of Nb and the balance Ni, and has an austenite matrix in which precipitated is at least one of .gamma.' phase and .gamma.' phase. The member can suitably used as parts which are subjected to pure water in nuclear reactor.

Member made of nickel base alloy having high resistance to stress

In-pile parts for a nuclear reactor made of alloy consisting essentially of by weight 0.01-0.2% C, 10-21% Cr, 1-4% Ti, 0.3-2% Nb, 0.1-2% Al and the balance Ni wherein Ti content being higher than Nb content, said alloy having the microstructure of chromium carbides precipitated in the grain boundaries and a .gamma.' phase precipitated in the grains with the matrix thereof being austenite in microstructure.

In-pile parts for nuclear reactor and method of heat treatment therefor

Growing community of inventors

Mito, Japan

Yasuhiko Mori