Elgiloy is considered a superalloy that consists of 39-41% Cobalt, 19-21% Chromium, 14-16% Nickel, 11-20% Iron, 6-8% Molybdenum, and 1.5-2.5% Manganese. This compound mixture allows Elgiloy to be a high strength, high fatigue, corrosion, cracking, and pitting resistant material. With these qualities, Elgiloy chemical etching is common for medical, aerospace, and defense.
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Characteristics of Elgiloy:
Elgiloy is resistant to sulfide stress corrosion cracking and pitting, and can operate at temperatures up to 850°F 454°C). Other characteristics include:
- High melting point (2601°F)
- Fatigue resistant
- High tensile strength of 141000 psi
- Yield strength of 69600 psi
Applications of Etched Elgiloy:
This "super-alloy" is popular for springs that are corrosion resistant, strong, ductile, and have good fatigue life. Other applications include:
- Semiconductor components
- Surgical implants
- Satellite communications equipment
- Weapon systems
- Medical devices
- Aerospace components that require high strength and temperature resistance
- Elgiloy provides more strength in a small space than Inconel X-750 and MP35N
- It is recommended that forming be done before heat treatment as heat treatment strengthens Elgiloy and make it difficult to form afterward
- Meets specifications of AMS 5876, AMS 5833, and UNS R30003
- Elgiloy is also known as Phynox Cobalt-Chromium-Nickel