Cobalt Based Alloys

Cobalt-based alloys are materials derived from compositions of cobalt-chromium, cobalt-chromium-tungsten, or cobalt-chromium-molybdenum ternaries. They have excellent magnetic properties, wear resistance, high-temperature strength, and corrosion resistance. These alloys have very high melting points, superior thermal fatigue, hot corrosion resistance, and weldability; all traits that make cobalt-based alloys ideal for challenging environments involving high-temperature and acids.

There are a wide variety of cobalt-based alloys on the market, and each offers different benefits depending on their final application. These alloys are commonly used in industries such as aerospace, automotive, oil & gas, petrochemical processing, and dental and orthopedic implants. They are also used in situations where oxidization is a concern and high-strength is critical.

Engineered Alloys offers a variety of cobalt-based alloys to meet our clients’ needs. Contact us today to request a quote and learn more about our products!

Alloy Specification Carbon Manganese Silicon Chromium Nickel Molybdenum Tungsten Cobalt Phosphorus Sulfur Copper Iron    Other 
Co 6 AMS 5387 and  5373 0.90 to 1.40 1.00 1.50 27.0 to 31.0 3.00 1.50 3.5 to 5.50 Balance 0.04 0.03 3.00
Co 12 1.10 to 1.70 1.00 1.00 28.0 to 32.0 3.00 7.0 to 9.50 Balance 0.04 0.03 3.00
Co 21 AMS 5385 0.20 to 0.30 1.00 1.00 25.00 to 29.00 1.75 to 3.75 5.00 to 6.00 Balance 0.04 0.04 3.00
Co 25 H.S. 25 (L605) 0.05 to 0.15 1.0 to 2.0 1.0 19.0 to 21.0 9.0 to 11.0 14.00 to 16.00 Balance 0.04 0.04 3.00
Co 31 AMS 5382 0.45 to 0.55 1.00 1.00 24.5 to 26.50 9.5 to 11.50 0.5 7.00 to 8.00 Balance 0.04 0.04 2.00 Zr 0.25
N155 AMS5376 0.20 1.00 to 2.00 1.00 20.00 to 22.50 19.00 to 21.00 2.50 to 3.50 2.00 to 3.000 18.5 to 21.00 0.04 0.03 Balance Cb/Ta 0.75 to 1.25Ta 0.05 Max

N2 0.10 to 0.20

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