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Multiphase Co-35Ni-20Mo-10Cr alloy MP35N is a high strength alloy withexcellent corrosion resistance. Its applications span chemical, medical, andfood processing industries. Thanks to its high modulus and high strength, itfound applications in reinforcement of ultra-high field pulsed magnets.Recently, it has also been considered for reinforcement in superconductingwires used in ultra-high field superconducting magnets. For these applications,accurate measurement of its physical properties at cryogenic temperatures isvery important. In this paper, physical properties including electricalresistivity, specific heat, thermal conductivity, and magnetization ofas-received and aged samples are measured from 2 to 300 K. The electricalresistivity of the aged sample is slightly higher than the as-received sample,both showing a weak linear temperature dependence in the entire range of 2 -300 K. The measured specific heat Cp of 0.43 J/g-K at 295 K agrees with atheoretical prediction, but is significantly smaller than the values in theliterature. The thermal conductivity between 2 and 300 K is in good agreementwith the literature which is only available above 77 K. Magnetic property ofMP35N changes significantly with aging. The as-received sample exhibits Curieparamagnetism with a Curie constant C = 0.175 K. While the aged sample containssmall amounts of a ferromagnetic phase even at room temperature. The measuredMP35N properties will be useful for the engineering design of pulsed magnetsand superconducting magnets using MP35N as reinforcement.

Low temperature physical properties of Co-35Ni-20Mo-10Cr alloy MP35N