Elgiloy Sheet & Strip for Custom Springs and Stampings

Please note that we do not sell Elgiloy or any other materials in raw form. Elgiloy sheet and strip are material options for custom springs, etc., manufactured by Peninsula Spring.

Elgiloy is a cobalt-chromium-nickel (Co-Cr-Ni) “super alloy”. It exhibits good mechanical properties, high strength and 
ductility, good fatigue life, and can be age-hardened. Elgiloy is ideal for manufacturing custom springs and custom stampings for applications that require high corrosion resistance and/or low relaxation at temperatures up to 600°F (316°C). Additionally, the material exhibits spring properties similar to 17-7 PH stainless steel.

To discuss material requirements for your custom manufacturing project, contact Peninsula Spring today.

Nominal Chemical & Physical Properties

  • Ni: 15.50%
  • Co: 40.00%
  • Cr: 20.00%
  • Mo: 7.00%
  • Minimum tensile strength: psi x 103 220-350
  • Design stress % minimum tensile: 45
  • Modulus of elasticity: psi x 106 29.5
  • Modulus in torsion: psi x 106 11.5
  • Maximum operating temperature: 600 °F (316°C)
  • Rockwell hardness: C38-55

Heat Treating Elgiloy

  1. Heat to 980°F/527°C (±10°F)
  2. Hold for 5 hours
  3. Air cool to room temperature

Manufacturing Custom Elgiloy Springs & Stampings

Elgiloy is cold drawn and precipitation hardened after fabrication. The alloy is suitable for use in fresh water, industrial and marine atmospheres, and mild chemical and oxidizing environments. It does very well in high temperature environments. Elgiloy offers spring properties very similar to 17-7 PH stainless steel.

Common Trade Names

  • Phynox
  • UNS R30003
  • ASTM F1058 (F-1058)
  • AMS 5834x

Contact Us for Elgiloy Springs & Elgiloy Stampings

Contact Peninsula Spring to discuss your custom project. We look forward to working with you!