ABSTRACT OF THE DISCLOSUREDisclosed are heat resisting alumina-forming,nickel-based austenitic alloys having superior oxidationand carburization resistance, superior creep strength,good high temperature ductility, and good microstructuralstability, which alloys consist essentially of (in % byweight):Cr 20-25 %Fe 10-15 %Al 3-6 %Hf 1-2 %W 1.5-3.25 %Nb 1-2 %Y 0.01- %C 0.2-0.3 %Ni balance
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