This paper summarizes the key properties of GTD-222 (1), 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.

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