Patent ID: 8512485

Claim:
An alloy, the alloy comprising by weight greater than about 0.06 percent carbon, up to about 0.0015 percent sulfur, less than about 16 percent chromium, between about 39 percent and about 44 percent nickel, between about 2.5 percent and about 3.3 percent niobium, between about 1.4 percent and about 2 percent titanium, up to about 0.5 percent aluminum, up to about 0.006 percent boron, up to about 0.3 percent copper, up to about 0.006 percent nitrogen, greater than about 0.5 percent molybdenum, greater than about 0.5 tungsten and a balance of iron, wherein a predetermined grain boundary morphology of the alloy includes MC carbides that mechanically block grain coarsening and generate a zig-zag morphology in the grain boundaries, the MC carbides comprising molybdenum and tungsten.