Elgiloy® Alloy: Past, Present & Future

Elgiloy® Alloy: Past, Present & Future

The Innovation of Elgiloy® alloy

After World War II, the Elgin National Watch Company, predecessor to today’s Elgiloy Specialty Metals, received complaints from returning servicemen that their Elgin watches couldn’t withstand the punishment of corrosive environmental situations in various theaters of war.

After four years of research, “Elgiloy® alloy”, a non-corroding watch spring material with an infinite life span, was born.

With excellent corrosion resistance, very high strength and temperature properties, this non-magnetic cobalt alloy was quickly recognized (in wire and strip form) as a preferred choice in medical device manufacturing, space grade material, aerospace and petrochemical industries, among others, for applications including:

  • Dental Implants
  • Medical Devices
  • Orthodontic Wire
  • Pacemakers
  • Satellite Communications Equipment
  • Seals
  • Semiconductor Components
  • Space Hardware Components
  • Springs
  • Stents
  • Surgical Clips
  • Surgical Implants
  • Torsion Bars
  • Weapons Systems


Trusted When It Counts: Highlighting the Features and Benefits of Elgiloy® alloy

Elgiloy® alloy is a non-magnetic Cobalt-Chromium-Nickel-Molybdenum alloy having a unique combination of very high strength while maintaining excellent formability, ductility, excellent corrosion resistance, and high fatigue strength.  Additional strength increases of up to 25% can be achieved through aging cold reduced material.

Alongside excellent fatigue life and good mechanical properties, Elgiloy® alloy  performs from temperatures ranging from cryogenic up to 850°F (454°C), making it stable for a wide variety of applications and end uses.

A key feature of Elgiloy® alloy is its high resistance in sulfide stress corrosion cracking and pitting environments.  As a result of this, the alloy is often regarded as the alloy of choice in the most demanding sour well environments, and in seawater, Elgiloy® alloy is virtually immune to crevice and stress corrosion and pitting even at the highest strength levels.

Elgiloy Specialty Metals offers drawn wire and raw material re-rolled to your specifications. For more information, reference our capabilities [link] and datasheets (linked below).

Elgiloy® alloy Wire Properties

Applicable Specifications for Wire & Bar:

AMS 5833, AMS 5834, ASTM F1058, NACE MR0175 (ISO 15156-3), ISO 5832-7, UNS R30003


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

Download the Elgiloy® alloy datasheet here. 

Request a quote 


Elgiloy® alloy Strip Properties

Applicable Specifications for Strip & Foil:

AMS 5876, ASTM F1058, NACE MR 0175 & MR 0103, ISO 5832-7


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

Download the Elgiloy® alloy datasheet here. 

Request a quote 


When Every Job is Mission-Critical, Choose Elgiloy Specialty Metals.

The metals we process are used in applications where failure is not an option. Our metals, under high pressure and temperatures, launch into space, withstand the corrosiveness of the oceans, and help to hold open the arteries in the hearts of the people we love.

We understand mission critical and have developed the processes and team to ensure your products meet specification every time.

Our ability to process high performance alloys, including our namesake, Elgiloy® alloy, is supported by our extensive accreditations and approvals by the most stringent agencies and manufacturers.

As a subsidiary of Combined Metals, we offer a network of precision flat rolling mills, wire drawing, precision slitting, along with a network of service centers and representation worldwide.