Improved 12 Percent Cr Rotor Forgings for Advanced Steam Turbines

[+] Author and Article Information
F. Ito

Tokyo Electric Power Co., Inc.

K. Kuwabara

Central Research Institute of Electric Power Industry

M. Miyazaki

Toshiba Corporation

Y. Fukui

Hitachi, Ltd.

Y. Takeda

Mitsubishi Heavy Industries, Ltd.

J. Eng. Gas Turbines Power 110(1), 127-131 (Jan 01, 1988) (5 pages) doi:10.1115/1.3240075 History: Received March 16, 1987; Online October 15, 2009


For future advanced steam turbines of 4500 psi and 1100°F, a high-temperature rotor is one of the most important components to be developed. We estimated that the usable temperature limit of existing 12Cr steel was approximately 1075°F, and then developed improved 12Cr steels. Prototype rotors were made from three types of developed steels, and were put to various evaluation tests. All three steels had creep-rupture strength exceeding that of existing 12Cr steels and were satisfactory in quality and in the other mechanical properties.

Copyright © 1988 by ASME
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