Patent ID: 7520947

Claim:
A method of processing a cobalt alloy comprising from 26 to 30 weight percent chromium, from 5 to 7 weight percent molybdenum, up to 1.0 nickel, up to 0.75 iron, up to 1.0 manganese, and greater than 50 weight percent cobalt, the method comprising: cold working the cobalt alloy to achieve a total reduction of 5 to 25 percent; and aging the cold worked cobalt alloy at a temperature ranging from 900° F. to 1300° F. for a time period ranging from 1 hour to 24 hours; wherein after aging the cold worked cobalt alloy, the cobalt alloy has a hardness of at least Rockwell C 50, an elongation of at least 2.2 percent, and an ultimate tensile strength of at least 260 kilopounds per square inch.