Patent ID: 8048369
Filing Date: 2011-11-01
Classification: A61L,C22C

Abstract:
1. An alloy having favorable fatigue resistance and comprising: at least 20 weight percent cobalt; 32.7 to 37.3 weight percent nickel; 18.75 to 21.25 weight percent chromium; 8.85 to 10.65 weight percent molybdenum; less than 30 ppm nitrogen; less than 0.7 weight percent titanium; at least one of at least 0.05 to 0.15 weight percent aluminum, at least 5 to 20 ppm calcium, at least 5 to 50 ppm magnesium, and at least 5 to 50 ppm cerium; and no greater than 1.05 weight percent iron; no greater than 0.035 weight percent carbon; and wherein the alloy includes generally spherical oxide inclusions and is substantially free of titanium nitride and mixed metal carbonitride inclusions.