Subheader Icon 877-412-3651
Request a quote
Request a quote

Cobalt

Select Alloy

Elgiloy Haynes 188 HS-556 L-605 MP159 MP35N N-155 6B TJA-1537
Catalog Image

Tech Steel & Materials supplies cobalt alloys for high-temperature, high-stress, and wear-critical applications where mechanical stability and reliability are non-negotiable. Cobalt-based alloys are widely specified in aerospace, defense, power generation, marine, and industrial environments that exceed the performance limits of conventional steels.

Cobalt alloys are selected for their ability to maintain strength, hardness, and surface stability at elevated temperatures. They offer excellent resistance to oxidation, sulfidation, carburization, and thermal fatigue, making them well suited for components exposed to extreme heat, pressure, and corrosive conditions.

These alloys are frequently used as alternatives to steel in jet engines, gas turbines, and other high-temperature systems where long-term performance and material integrity are critical.

Cobalt Alloy Properties & Performance

Cobalt alloys exhibit outstanding high-temperature strength, creep resistance, and wear resistance. Unlike many steels, they resist softening and mechanical degradation when exposed to prolonged heat. Their stable microstructure allows them to perform reliably in severe operating environments where dimensional stability and surface durability are required.

In addition to high-temperature performance, cobalt alloys provide strong resistance to corrosion mechanisms such as oxidation and sulfidation. This makes them suitable for chemically aggressive environments, including chemical processing, oil and gas systems, and heat-treating applications.

Applications

Cobalt alloys are commonly used in aerospace turbine components, jet engine hardware, and gas turbine systems. They are also specified for power generation equipment, valves, pumps, piping systems, tooling, and wear-resistant assemblies. In industrial and energy applications, cobalt alloys are frequently used where high heat, friction, and corrosive exposure occur simultaneously.

Frequently Asked Questions About Cobalt Alloys

What are cobalt alloys used for?

Cobalt alloys are used in high-temperature and high-wear applications where strength, stability, and corrosion resistance are required. Typical uses include aerospace turbines, jet engines, power generation equipment, chemical processing systems, and oil and gas components.

Why are cobalt alloys used instead of steel?

Cobalt alloys retain strength, hardness, and wear resistance at temperatures where most steels begin to lose mechanical integrity. They also provide superior resistance to oxidation, sulfidation, and thermal fatigue, making them better suited for extreme environments.

How do cobalt alloys perform at high temperatures?

Cobalt alloys offer excellent creep resistance and surface stability at elevated temperatures. Their microstructure remains stable during prolonged heat exposure, which is why they are commonly specified for turbine engines and other thermal-critical components.

Available Product Forms

Tech Steel & Materials supplies cobalt alloys in a wide range of product forms to meet specification-driven requirements. Common forms include bar, rod, wire, sheet, plate, strip, tube, pipe, castings, and forgings. Availability depends on alloy grade, governing specification, and dimensional requirements.

Value-added services such as custom cutting, machining, testing, and export-ready packaging are available for both domestic and international programs.

Select AMS

AMS Number Alloy Type UNS Cross Ref. Spec Misc./Shape
AMS 5537 Cobalt Cobalt R30605
AMS 5537 Foil Cobalt Cobalt R30605 - Foil AMS 5537 Foil
AMS 5537 Plate Cobalt Cobalt R30605 - Plate AMS 5537 Plate
AMS 5537 Sheet Cobalt Cobalt R30605 - Sheet AMS 5537 Sheet
AMS 5537 Strip Cobalt Cobalt R30605 - Strip AMS 5537 Strip
AMS 5608 Cobalt Cobalt R30188
AMS 5608 Plate Cobalt Cobalt R30188 - Plate AMS 5608 Plate
AMS 5608 Sheet Cobalt Cobalt R30188 - Sheet AMS 5608 Sheet
AMS 5608 Strip Cobalt Cobalt R30188 - Strip AMS 5608 Strip
AMS 5758 Cobalt Cobalt R30035 - Bar Cobalt
AMS 5759 Cobalt Cobalt R30605
AMS 5759 Bar Cobalt Cobalt R30605 - Bar AMS 5759 Bar
AMS 5759 Custom Tube Cobalt Cobalt R30605 - Custom Tube AMS 5759 Custom Tube
AMS 5759 Forging Cobalt Cobalt R30605 - Forging AMS 5759 Forging
AMS 5759 Ring Cobalt Cobalt R30605 - Ring AMS 5759 Ring
AMS 5768 Cobalt Cobalt R30155
AMS 5768 Bar Cobalt Cobalt R30155 - Bar AMS 5768 Bar
AMS 5768 Forging Cobalt Cobalt R30155 - Forging AMS 5768 Forging
AMS 5768 Ring Cobalt Cobalt R30155 - Ring AMS 5768 Ring
AMS 5768 Wire Cobalt Cobalt R30155 - Wire AMS 5768 Wire
AMS 5769 Cobalt Cobalt R30155
AMS 5769 Bar Cobalt Cobalt R30155 - Bar AMS 5769 Bar
AMS 5769 Forging Cobalt Cobalt R30155 - Forging AMS 5769 Forging
AMS 5769 Ring Cobalt Cobalt R30155 - Ring AMS 5769 Ring
AMS 5772 Cobalt Cobalt R30188
AMS 5772 Bar Cobalt Cobalt R30188 - Bar AMS 5772 Bar
AMS 5772 Custom Tube Cobalt Cobalt R30188 - Custom Tube AMS 5772 Custom Tube
AMS 5772 Forging Cobalt Cobalt R30188 - Forging AMS 5772 Forging
AMS 5772 Ring Cobalt Cobalt R30188 - Ring AMS 5772 Ring
AMS 5796 Cobalt Cobalt R30605 - Wire Cobalt
AMS 5801 Cobalt Cobalt R30188 - Wire Cobalt
AMS 5831 Cobalt Cobalt R30556 - Wire Cobalt
AMS 5833 Cobalt Cobalt R30003 - Wire Cobalt
AMS 5841 Cobalt Cobalt R30159 - Bar Cobalt
AMS 5842F Cobalt Cobalt R30159 AMS 5842E Bar Cobalt
AMS 5843 Cobalt Cobalt R30159 - Bar Cobalt
AMS 5844 Cobalt Cobalt R30035 - Bar Cobalt
AMS 5845 Cobalt Cobalt R30035 - Bar Cobalt
AMS 5874 Cobalt Cobalt R30556
AMS 5874 Plate Cobalt Cobalt R30556 - Plate AMS 5874 Plate
AMS 5874 Sheet Cobalt Cobalt R30556 - Sheet AMS 5874 Sheet
AMS 5874 Strip Cobalt Cobalt R30556 - Strip AMS 5874 Strip
AMS 5875 Cobalt Cobalt R30003 - Strip Cobalt
AMS 5876 Cobalt Cobalt R30003 - Strip Cobalt
AMS 5894 Cobalt Cobalt R30016
AMS 5894 Bar Cobalt Cobalt R30016 - Bar AMS 5894 Bar
AMS 5894 Plate Cobalt Cobalt R30016 - Plate AMS 5894 Plate
AMS 5894 Sheet Cobalt Cobalt R30016 - Sheet AMS 5894 Sheet

Select ASTM

ASTM Specification Alloy Type UNS Cross Ref. Spec
ASTM F1091-12 Cobalt Cobalt UNS R30605 AMS 5537, AMS 5759, AMS 5796
ASTM F1377-13 Cobalt Cobalt UNS R30075
ASTM F1537-11 Cobalt Cobalt UNS R31537
ASTM F1537-11 Cobalt Cobalt UNS R31538
ASTM F1537-11 Cobalt Cobalt UNS R31539
ASTM F562-13 Cobalt Cobalt UNS R30035 AMS 5844, AMS 5845, AMS 5758

Request a Quote

    Metal Weight Calculator

    Bar and Rod Icon for Tech Steel & Materials

    0 Lbs

    Request a Quote
    Reset