In order to apply safely a turbine-bucket alloy which has been successful in short-life high-temperature aircraft gas turbines to long-life heavy-duty gas turbines, it was necessary to make many laboratory tests. These included tensile, rupture, creep, fatigue, damping, oxidation, and corrosion tests. Many of these tests were made on specimens which had been aged for 5000 and 10,000 hr. Rupture data were obtained to 15,000 hr. Operating experience has confirmed laboratory tests and now M-252 is destined to become a standard bucket material for heavy-duty gas turbines.

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