Alloy MP35N* • UNS R30035 • WNR 2.4999

MP35N* is an age hardenable nickel-cobalt base alloy that has a unique combination of properties - ultra high strength, toughness, ductility and outstanding corrosion resistance. MP35N resists corrosion in hydrogen sulphide, salt water and other chloride solutions. It also has excellent resistance to crevice and stress corrosion cracking in sea water and other hostile environments. Suitable where a high combination of strength, high modulus values and good corrosion resistance are required. Applications for this alloy also include medical devices and dental products.

Available tube product forms

Typical Applications

  • Pressure housing
  • Medical implants

Typical manufacturing specifications

  • DIN ISO 5832-6 2001
  • Also individual customer specifications.

Industries predominantly using this grade            

Technical Data

Mechanical Properties

Temper Annealed
Tensile Rm 28 ksi (min)
Tensile Rm 190 MPa (min)
R.p. 0.2% Yield 26 ksi (min)
R.p. 0.2% Yield 180 MPa (min)
Elongation (2” or 4D gl) 10 % (min)


Physical Properties (Room Temperature)

Specific Heat (0-100°C) 502 J.kg-1.°K-1
Thermal Conductivity 11.2 W.m -1.°K-1
Thermal Expansion 12.8 mm/m/°C
Modulus Elasticity 234 GPa
Electrical Resistivity 6.21 μohm/cm
Density 8.43 g/cm3


Chemical Composition (% by weight)

Element Min Max
C - 0.025
Si - 0.15
Mn - 0.15
P - 0.015
S - 0.01
Co Balance
Fe - 1
Cr 19 21
Mo 9 10.5
Ni 33 37
Ti - 1
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