Elgiloy®

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Applicable Specifications

Strip and Foil: AMS 5876, ASTM F1058, NACE MR 0175 & MR 0103, ISO 5832-7

Applications

Springs, seals, semiconductor components, orthodontics, medical devices, surgical implants, satellite communications equipment, and weapons systems.

Description

Elgiloy^® is a non-magnetic Cobalt-Chromium-Nickel-Molybdenum alloy having a unique combination of very high strength while maintaining excellent formability, excellent corrosion resistance, and high fatigue strength. Additional strength increases of up to 25% can be achieved through aging cold reduced material. Elgiloy^® is highly resistant to sulfide stress corrosion cracking, and as a result is the alloy of choice in the most demanding sour well environments. In seawater, Elgiloy^® is virtually immune to crevice and stress corrosion and pitting even at the highest strength levels. Elgiloy^® performs across a wide range of temperatures: from cryogenic up to 850°F (454°C).

Industries Supplied

Oil & Gas Extraction, Medical, Dental, Aerospace, Defense, Space Exploration and Watch making.

Nominal Composition

C: 0.15 max
Mn: 1.5 – 2.5
Si: 1.20 max
P: 0.015 max
S: 0.015 max
Cr: 19.0 – 21.0
Ni: 14.0 – 16.0
Co: 39.0 – 41.0
Mo: 6.0 – 8.0
Be: 0.10 max
Fe: Balance

Physical Properties

Density: 0.30 lb/in³, (8.30 g/cm³)

Modulus of Elasticity (E):
At 70°F (20°C): 27 – 29 x 103 ksi cold reduced (186 – 200 GPa cold reduced)

At 70°F (20°C): 30 – 32 x 103 ksi cold reduced & aged (206 – 221 GPa cold reduced & aged)

Modulus of Rigidity (G):
At 70°F (20°C): 11.0 x 10³ ksi (76 GPa)

Coefficient of Expansion:
8.4 µin/in.-°F (70°F to 600°F)
15.2 µm/m-°C (20°C to 300°C)

Electrical Resistivity: 39.21 µΩ.in, (99.6 µΩ.cm)

Thermal Conductivity: 86.5 Btu-in/ft²hr-°F, (12.5 W/m-K)

Typical Mechanical Properties – Spring Applications

• Annealed
  • Heat Treatment: Per AMS 5876
  • Tensile Strength: 100 ksi min (690 MPa)
  • Suggested Operating Conditions: -300°F to 850°F (-184°C to 454°C)
• Spring Temper
  • Heat Treatment: No Heat Treatment
  • Tensile Strength: Up to 310 ksi (2100 MPa)
  • Suggested Operating Conditions: -300°F to 850°F (-184°C to 454°C)
• Spring Temper + Aged
  • Heat Treatment: After cold rolling. Age: Per AMS 5876, Nace MR 0175
  • Tensile Strength: Up to 380 ksi (2600 MPa)
  • Suggested Operating Conditions: -300°F to 850°F (-184°C to 454°C)

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Elgiloy^® is a registered trademark of Elgiloy Specialty Metals.

For further information Contact:

Contact Us
Phone: 1 888 843 2350
Elgiloy Specialty Metals – Strip Products
1565 Fleetwood Dr.
Elgin, IL 60123 USA