MP159 per AMS 5842 Cobalt-Nickel
AMS 5842 outlines the specifications for the MP159 cobalt-nickel alloy bars that are melted via a method of vacuum induction followed by a vacuum consumable electrode, then solution heat treated and work strengthened. The standard is based on the base chemistry and processing of the MP159 to ensure that the materials have the ability to provide exceptional mechanical properties and corrosion resistance for engineering applications.
The MP159, as outlined in the AMS 5842, has the ability to display ultra-high strength, excellent toughness, ductility, and corrosion resistance, even in harsh environments. The ability of the alloy to be work hardened and aged allows the ultimate tensile strength to be above 1830 MPa, making it one of the best cobalt-nickel alloys in the industry.
Applications of AMS 5842 MP159
MP159 bars produced to AMS 5842 are used in applications where high strength, corrosion resistance, and weight efficiency are critical. Typical uses include:
- Aerospace components such as high‑load shafts, fittings, and structural parts
- Defense and space systems that operate in extreme environments
- Oil & energy equipment exposed to corrosive fluids and elevated temperatures
- Industrial machinery requiring long‑lasting, high‑strength components
- Marine hardware and fasteners exposed to seawater and chemical attack
Performance, Processing, and Properties of AMS 5842
The MP159 alloy has been developed to possess exceptionally high tensile strength, high fatigue resistance, and superb resistance to corrosive environments. This is achieved in three important ways:
- Solution heat treatment to achieve a homogeneous microstructure
- Work hardening to increase the density of dislocations in the material to enhance its strength
- Aging or precipitation hardening to form finer particles to increase its strength
The above processes ensure that the MP159 alloy, when processed to AMS 5842 specifications, meets the stringent requirements of components in service.
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.