Elgiloy (Co-Cr-Ni Alloy) is a " super-alloy" consisting of 39-41%

cobalt Cobalt is a chemical element with the symbol Co and atomic number 27. As with nickel, cobalt is found in the Earth's crust only in a chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, p ...

, 19-21% chromium, 14-16%

nickel Nickel is a chemical element with symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel is a hard and ductile transition metal. Pure nickel is chemically reactive but large pieces are slow ...

, 11.3-20.5%

iron Iron () is a chemical element with Symbol (chemistry), symbol Fe (from la, Wikt:ferrum, ferrum) and atomic number 26. It is a metal that belongs to the first transition series and group 8 element, group 8 of the periodic table. It is, Abundanc ...

, 6-8% molybdenum, 1.5-2.5%

manganese Manganese is a chemical element with the symbol Mn and atomic number 25. It is a hard, brittle, silvery metal, often found in minerals in combination with iron. Manganese is a transition metal with a multifaceted array of industrial alloy use ...

and 0.15% max.

carbon Carbon () is a chemical element with the symbol C and atomic number 6. It is nonmetallic and tetravalent—its atom making four electrons available to form covalent chemical bonds. It belongs to group 14 of the periodic table. Carbon mak ...

. It is used to make springs that are corrosion resistant and exhibit high strength,

ductility Ductility is a mechanical property commonly described as a material's amenability to drawing (e.g. into wire). In materials science, ductility is defined by the degree to which a material can sustain plastic deformation under tensile str ...

, and good fatigue life. These same properties led to it being used for control cables in the Lockheed SR-71 Blackbird airplane as they needed to cope with repeated stretching and contracting. Elgiloy meets specifications AMS 5876, AMS 5833, and UNS R30003. Due to its chemical composition, Elgiloy is highly resistant to sulfide stress corrosion cracking and pitting, and can operate at temperatures up to 454 °C. Elgiloy is a trade name for this super alloy. Phynox is another trade name for the same super alloy.

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Superalloys Metallurgy {{alloy-stub

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