MP35N® alloy is a unique multiphase system that combines the highly desired chemical and mechanical properties of its constituent elements: Nickel (Ni), cobalt (Co), chromium (Cr), and molybdenum (Mo). The result is a high-performance alloyed system that is much more than the sum of its parts. Providing an enviable mix of ductility and strength alongside exceptional corrosion-resistant characteristics, MP35N® is routinely employed in some of the toughest application areas in modern engineering.

Over the years, H.C. Starck Solutions has built a reputation for delivering world-class engineered products for key market segments. This requires a unique understanding of the demands placed upon critical materials in specific working environments, to provide the right materials for the job. Among these is MP35N® alloy system, with an extremely attractive manifold of physicochemical properties for an array of applications.

This article will explore the properties and applications of MP35N® alloy in greater depth.

What is MP35N® Alloy?

MP35N® is a complex, high-performance, multiphase alloy system that is generated via vacuum induction melting and vacuum arc re-melting (VIM-VAR) where elements have nominal concentrations of: 35% nickel; 35% cobalt; 20% chromium; and 10% molybdenum.  Such high concentrations of alloy additions could now be considered as a high entropy alloy system. After melting, the alloy can then be work-hardened and aged to improve its tensile strength without greatly compromising its ductility.

Despite its exceptional mechanical characteristics, MP35N® alloy is fabricated and is available from H.C. Starck Solutions in rolled plate, sheet, and foil configurations as well as machined part.

MP35N® Properties: Ductile, Strong & Corrosion-Resistant

Depending on the production process, MP35N® alloy can be manufactured for variable yet specific tensile and yield strengths across an exceptionally high range (1790 – 2070 MPa). We find that minimum strength(860 MPa) is most commonly achieved in the hot rolled/annealed condition while maximum values are attained through cold working and aging. A similar linearity is observed in the alloy’s hardness, increasing from approximately Rockwell C7 to Rockwell C50.

The corrosion-resistant properties of MP35N® alloy system are principally determined by its alloying composition. All four alloying elements impart enhanced corrosion-resistant properties, preventing oxidation, pitting, sulfidation, and other complex forms of chemical attack. Combining these superior characteristics with the aforementioned mechanical performance also provides outstanding resistance to dynamic modes of failure, such as hydrogen embrittlement and stress corrosion cracking (SCC) while maintaining mechanical properties at cryogenic temperatures.

Applications for MP35N® Alloys

This excellent combination of chemical and mechanical characteristics makes MP35N® alloys ideal for a wide range of application areas. At H.C. Starck Solutions, we routinely provide flat-rolled MP35N® products for aerospace and aviation; chemical processing; cryogenic research; marine engineering; oil and gas; prosthetic manufacturing and orthodontics; spring applications in severe enviroments, and many more.

If you need a high-performance alloy system for your application and are considering MP35N® alloy products, why not contact a member of the H.C. Starck sales team today? We will happily answer any questions you may have and help find a solution that fits your specifications.

*MP35N® is a registered trademark of SPS Technologies, LLC.