This paper summarizes the key properties of GTD-222 (Wood and Haydon, 1989), a new cast nickel-base nozzle alloy developed by GE for use in land-based gas turbines. GTD-222 is being introduced as a replacement for FSX-414 in second and third-stage nozzles of certain machines. Presented in this paper are comparisons of the tensile, creep-rupture, and fatigue properties of GTD-222 versus FSX-414. In addition, the results of a long-term thermal stability study, high-temperature oxidation, and hot corrosion evaluation as well as weldability results will be discussed.

Issue Section:
Research Papers
Topics:
Alloys, Gas turbines, Nickel, Nozzles, Corrosion, Creep, Fatigue properties, High temperature, Machinery, Oxidation, Rupture, Thermal stability, Wood products
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Copyright © 1993
 by The American Society of Mechanical Engineers
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