Metal alloys for medical devices

A medical device that is at least partially formed of a metal alloy which improves the strength and ductility of the medical device, said metal alloy including at least about 95 wt. % of rhenium and molybdenum, said metal alloy including at least 45 wt. % rhenium and at least 50 wt. % molybdenum, said metal alloy including about 0.01-5 wt. % of additional metal additive, said additional metal additive includes A) one or more metals selected from the group consisting of hafnium and technetium, or B) one metal selected from the group consisting of hafnium, osmium, technetium and vanadium, and a second different metal selected from the group consisting of hafnium, niobium, osmium, platinum, technetium, titanium, tungsten, vanadium, and zirconium, said metal alloy has a controlled amount of nitrogen, oxygen and carbon so as to reduce micro-cracking in said metal alloy, a nitrogen content of in said metal alloy is less than a combined content of oxygen and carbon in said metal alloy, said metal alloy has an oxygen to nitrogen atomic ratio of at least about 1.2:1, said metal alloy has a carbon to nitrogen atomic ratio of at least about 2:1, said metal alloy includes less than about 0.2 wt. % carbon, less than about 0.1 wt. % oxygen, and less than about 0.001 wt. % nitrogen, said metal alloy has an average yield strength of at least about 70 ksi and an average ultimate tensile strength of at least about 60 ksi, said metal alloy has an average grain size of about 5-10 ASTM, said metal alloy has an average tensile elongation of at least about 25%, said metal alloy has an average hardness of at least about 60 Rockwell A Hardness at 77° F., and said metal alloy has an average density of at least about 13.4 gm/cc.