(57) A first embodiment of a nickel based alloy consists essentially of from 3.0 to 5.2
wt% chromium, from 1.5 to 3.0 wt% molybdenum, from 6.0 to 12.5 wt% tungsten, from
5.0 to 11 wt% tantalum, from 5.5 to 6.5 wt% aluminum, from 11 to 14 wt% cobalt, from
0.001 to 1.75 wt% rhenium, from 0.2 to 0.6 wt% hafnium, up to 0.05 wt% yttrium, up
to 3.0 wt% ruthenium, and the balance nickel. Another embodiment of a nickel based
alloy consists essentially of from 1.0 to 3.0 wt% chromium, up to 2.5 wt% molybdenum,
from 11 to 16 wt% tungsten, from 4.0 to 8.0 tantalum, from 5.7 to 6.5 wt% aluminum,
from 11 to 15 wt% cobalt, from 2.0 to 4.0 wt% rhenium, from 0.2 to 0.6 wt% hafnium,
up to 0.05 wt% yttrium, up to 3.0 wt% ruthenium, and the balance nickel.
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