Nimonic Alloy 90 Chemical Properties, Grades, Table and Pdf

Niobium Alloy 90 is a highly sought after nickel-chromium-cobalt alloy incorporating remarkable strength and corrosion resistance at high temperatures. The chemical composition of electrolyte is usually nickel, chromium, cobalt and iron along with some other minor elements. This alloy has grades that serve various industry standards like AMS 5829 and BS HR2 which are used in aerospace, gas turbine components, and high-temperature structure parts, respectively. A complete table which comprises of its chemical composition, mechanical properties and given grades need to be presented to them. One of the PDF document's strong points is that it simplifies the process of picking the design material, which in turn, makes it easier to use different alloys in the harsh conditions.

Nimonic Alloy 90 Chemical Composition And Grade Table

Nimonic Alloy 90 is a nickel-chromium-cobalt alloy which is famous for its elevated temperature resistant strength. The chemical composition of the alloy suggested is about 54% nickel, 18.5% chromium, and 15.5% cobalt, plus trace amounts of other elements like iron, titanium, aluminum, and manganese. This alloy resists oxidation, corrosion, and creep deformation very well, which makes it suitable for applications in demanding aerospace, gas turbine engines, and furnaces heating. Nimonic Alloy 90 belongs to several international standards systems, among which are ASTM B408 and UNS N07090.

Nimonic Alloy 90 Composition Table
Elements Fe Cr Co Ti Al
Max (%) 58.5 19.5 18 2.5 1.5

Advantages and Disadvantages of Nimonic Alloy 90


  • High Temperature Strength: Components retain strength at higher temperatures, suitable for high-temperature use.

  • Good Corrosion Resistance: Improved service life by resisting oxidation and corrosion in highly corrosive conditions.

  • Excellent Creep Resistance: Maintains shape and prevents failure under continuous stress at high temperatures.

  • Versatile Applications: Can be applied to a wide range of industries such as aerospace, automotive, and power generation.


  • Costly: High production costs due to complex materials and sophisticated production techniques.

  • Limited Availability: May not be as accessible as some other commonly used alloys.

  • Machining Difficulty: Requires specialized methods due to its hardness and toughness.

  • Sensitivity to Contamination: Vulnerable to contamination from other materials used in production.

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