G27

G27 is a patented nickel base cast-and-wrought alloy designed for high temperature strength, stability, notch ductility, and minimal elevated temperature dwell fatigue crack growth rate. It provides a stable RMS structure, with a wide hot forging range, good formability and excellent fatigue behavior while being oxidation resistant. Formulated without cobalt, the raw material cost variability of this alloy is significantly lower than for Waspaloy, but cobalt can also be added to improve stress rupture at the cost of dwell fatigue crack growth resistance.

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