AMS 5841 Specification - MP159 Cobalt‑Nickel Alloy Bars
The specification AMS 5841 covers MP159 cobalt-nickel alloy bars, which are known for their strength, corrosion resistance, and resistance to high temperatures. The spec covers MP159 that has been processed by VIM/VAR, solution heat-treated to enhance work hardening and achieve microstructural properties.
MP159, as per the spec AMS 5841, has shown excellent properties of high strength, corrosion resistance, ductility, and toughness, making it suitable for applications where performance under stress and extreme conditions is critical.
Performance and Processing
MP159 is renowned for its exceptional strength, as well as its resistance to corrosion. The ultimate tensile strength of this alloy can be raised above 1830 MPa by a solution heat treatment, followed by work hardening and aging.
- Work Strengthening: Increases dislocation density in the alloy microstructure, enhancing strength while maintaining ductility.
- Aging (Precipitation Hardening): Forms fine, stable precipitates that significantly increase strength without dramatic loss of ductility.
These processes, when applied in accordance with AMS 5841 guidelines, provide MP159 with mechanical properties suitable for critical load‑bearing applications.
Applications of MP159
MP159 is utilized in aircraft components, such as gears, shafts, and fasteners, owing to its exceptional strength-to-weight ratio and resistance to corrosion.
MP159 is employed in military equipment and weapons systems, like tanks, missiles, and aircraft, thanks to its high strength and ability to withstand harsh environments.
MP159 is employed in spacecraft components, such as rocket engines, thrusters, and structural components, thanks to its durability and resistance to wear and tear.
MP 159 is utilized in downhole tools and other components in the oil and gas industry, because of its robustness and resistance to harsh conditions. It’s also used in oil and gas pipelines and in other components exposed to severe environments.
MP159 SPECIFICATIONS
MP35N HEAT TREATING CONDITIONS
Standards specifying thermal processing and quality verification for MP159.
BARS & FORGINGS
Material produced in long‑product form to support precision machining and high‑performance part fabrication.
Certified Material for Critical Service
All MP159 supplied by Fighter Jet Metals is delivered with:
- Complete material test reports (MTRs)
- Heat numbers and traceability documentation
- Verification of compliance to applicable AMS and OEM standards
Additional project‑specific certification or testing protocols can be provided upon request to support quality and regulatory requirements for critical applications.