Hitachi, Ltd.

Yosimi Maeno

Yasuo Watanabe

Yutaka Fukui

Nobuyuki Iizuka

Masao Siga

Ryo Hiraga

Mitsuo Kuriyama

Shintaro Takahashi

Katsumi Iijima

Soichi Kurosawa

A heat resistant steel of the present invention contains 0.05 to 0.2 wt. % of C, less than 0.5 wt. % of Si, less than 0.6 wt. % of Mn, 8 to 13 wt. % of Cr, 1.5 to 3 wt. % of Mo, 2 to 3 wt. % of Ni, 0.05 to 0.3 wt. % of V, 0.02 to 0.2 wt. % in total of either or both of Nb and Ta, 0.02 to 0.1 wt. % of N and the balance substantially Fe. Since a gas turbine of the present invention is constituted by members, such as discs, blades, shafts and so forth, made of alloys of this kind, the gas turbine has a structure in which it is possible to achieve a high level of creep rupture strength and Charpy impact value.

Heat resistant steel and gas turbine components composed of the same

Gas turbine having components composed of heat resistant steel

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Hitachi, Japan

Yosimi Maeno