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AMS 5875 Cobalt Alloy@ Corrosion and Heat-Resistant@ Strip 20Cr – 15Ni – 40Co – 7.0Mo – 16Fe Solution Heat Treated@ Cold Rolled@ and Aged Vacuum Induction Plus Vacuum Consumable Electrode Melted (UNS R30003)

AMS 5875: Exploring the Advancements in High-Strength Nickel-Alloy

Introduction AMS 5875 is a specification designated by the Aerospace Materials Specifications committee, specifically focused on a high-strength nickel-iron-cobalt alloy known for its exceptional mechanical properties and corrosion resistance. This alloy belongs to the family of superalloys, renowned for their excellent performance under extreme conditions, making them highly sought after in aerospace, marine, and other high-demand industries. In this article, we will delve into the chemical composition, mechanical properties, and applications of AMS 5875, shedding light on its significance in modern engineering practices.

Chemical Composition

AMS 5875 is a precipitation-hardenable nickel-iron-cobalt alloy with additional elements contributing to its remarkable properties. The chemical composition of AMS 5875 typically includes nickel as the base element, along with significant amounts of cobalt and chromium. Molybdenum, titanium, and aluminum are often added to enhance specific characteristics such as strength, corrosion resistance, and stability at high temperatures. Additionally, small proportions of carbon, manganese, and other trace elements may be present to fine-tune the alloy’s properties.

The precise composition of AMS 5875 can vary slightly depending on the manufacturer and specific grade. However, a common composition for this alloy might consist of approximately 40-55% nickel, 20-26% cobalt, 15-21% chromium, 2-3% molybdenum, 1-2% titanium, and traces of other elements. This balanced combination of elements forms a solid solution matrix with dispersed strengthening phases, resulting in a material with exceptional mechanical and corrosion-resistant properties.

Mechanical Properties:

The mechanical properties of AMS 5875 are tailored through a combination of heat treatment and cold working processes. This alloy exhibits high tensile strength, excellent impact resistance, and good fatigue properties, making it suitable for applications requiring superior performance under extreme conditions. Some of the key mechanical properties of AMS 5875 include:

  1. Tensile Strength: AMS 5875 typically has a tensile strength ranging from 1100 MPa to 1400 MPa, depending on the specific grade and heat treatment condition. This high tensile strength allows the alloy to withstand significant mechanical loads without permanent deformation.
  2. Yield Strength: The yield strength of AMS 5875 is typically in the range of 800 MPa to 1100 MPa. This property is crucial for determining the stress levels at which the material begins to deform plastically under load.
  3. Elongation: AMS 5875 exhibits a moderate elongation at break, which is a measure of the material’s ductility. The elongation typically ranges from 10% to 20%, indicating the ability of the alloy to deform before fracturing.
  4. Hardness: The hardness of AMS 5875 varies depending on the specific grade and heat treatment. It typically falls within the range of 30 HRC to 40 HRC, reflecting the material’s resistance to deformation and abrasion.


AMS 5875 is widely utilized in a variety of industries where high performance and reliability are essential. Some of the common applications of AMS 5875 include:

  1. Aerospace Industry: AMS 5875 is extensively used in the aerospace sector for critical components such as turbine blades, combustion chambers, and exhaust systems. Its high strength, heat resistance, and corrosion resistance make it ideal for withstanding the demanding conditions of aircraft engines and propulsion systems.
  2. Marine Engineering: The superior corrosion resistance of AMS 5875 makes it a preferred choice for marine applications, including offshore drilling equipment, marine gas turbines, and seawater-exposed components. The alloy’s ability to resist both general and localized corrosion ensures longevity in harsh marine environments.
  3. Oil and Gas Industry: AMS 5875 finds applications in oil and gas exploration and production operations, where equipment is subjected to high temperatures, pressures, and corrosive environments. Components such as valves, pumps, and downhole tools benefit from the alloy’s combination of strength and corrosion resistance.
  4. Power Generation: In power generation facilities, AMS 5875 is utilized in turbines, boiler systems, and heat exchangers due to its ability to withstand elevated temperatures and aggressive operating conditions. The alloy’s high mechanical strength and thermal stability contribute to efficient and reliable power generation processes.

In conclusion, AMS 5875 represents a high-performance nickel-iron-cobalt alloy that offers exceptional mechanical properties, corrosion resistance, and thermal stability. Its versatile nature and wide range of applications across diverse industries underscore its importance in modern engineering practices. As technology continues to advance, the demand for materials like AMS 5875 will only grow, driving further innovation and exploration in the field of high-strength alloys.

Tianjin Anton Metal Manufacture Co., Ltd. is a company specializing in the production of various nickel-based alloys, Hastelloy alloys and high-temperature alloy materials. The company was established in 1989 with a registered capital of 10.0 million, specializing in the production and sales of alloy materials. Anton Metal’s products are widely used in aerospace, chemical industry, electric power, automobile, nuclear energy and other fields, and can also provide customized alloy material solutions according to customer needs. If you need to know the price consultation of alloy materials or provide customized alloy material solutions, please feel free to contact the sales staff.

ANTON METAL| Your specialty alloys manufacturer
Email: dominic@antonmetal.com
Phone: +8613132148618(wechat/whatsapp)

Post time: Mar-27-2024