MP35N® Alloy

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Applications

Seals, springs, medical devices & implants

Description

Type MP35N® is a non-magnetic Cobalt-Nickel-Chromium-Molybdenum alloy having an excellent combination of very high strength, excellent corrosion resistance and high fatigue strength.  MP35N® is highly resistant to sulfide stress corrosion cracking and provides excellent performance in the most demanding sour well environments. In seawater MP35N® is virtually immune to crevice and stress corrosion and pitting even at the highest strength levels and can operate at cryogenic temperatures up to 850^oF (454^oC).

Industries Supplied

Oil & Gas Extraction, Medical & Dental, Aerospace, Defense and Space Exploration

Nominal Composition

C: 0.25 max
Mn: 0.15 max
Si: 0.15 max
P: 0.015 max
S: 0.01 max
Cr: 19.0 – 21.0
Ni: 33.0 – 37.0
Ti: 1.0 max
Fe: 1.0 max
Co: bal
Mo: 9 – 10.5

Physical Properties

Density: 0.304 lb/in³, (8.42 g/cm³)

Modulus of Elasticity (E):
At 70°F (20°C): 33.8 x 10³ ksi (233 GPa)

Modulus of Rigidity (G)
At 70°F (20°C):  12.1 x 10³ ksi (83.4 GPa)

Coefficient of Expansion:
8.2 microinches/in-^oF (70-600^oF)
14.8 x μm/m-^oC (20-300^oC)

Electrical Resistivity: 40.6 µohm-in, (103 µohm-cm)

Thermal Conductivity:
78 Btu-in/ft²hr-°F
11.2 W/m-K

Applicable Specifications

Strip and Foil: ASTM F688, NACE MR0175/ISO 15156, NACE MR0103

Typical Mechanical Properties

• Annealed
  • Heat Treatment: 1900-2150°F (1040-1175°C)
  • Tensile Strength: 115 – 135 ksi (790-930MPa)
  • Suggested Operating Conditions: -300°F to 800°F (-184°C to 427°C )
• Spring Temper
  • Heat Treatment: (Stress relieve as needed)
  • Tensile Strength: 200 ksi min  (1380MPa)
  • Suggested Operating Conditions: -300°F to 800°F (-184°C to 427°C )
• Spring Temper + Aged
  • Heat Treatment: 1000-1200°F (1040-1175°C)
  • Tensile Strength: 275 ksi min (1900 MPa)
  • Suggested Operating Conditions: -300°F to 800°F (-184°C to 427°C )

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For further information Contact:

Contact Us
Phone: 1 888 843 2350
Elgiloy Specialty Metals – Strip Products
1565 Fleetwood Dr.
Elgin, IL 60123 USA

Limitation of Liability and Disclaimer of Warranty:

• The content in these data sheets is provided primarily by third-party melting mills and is provided for reference only.  It is not intended for engineering or design.
• Applications may be discussed, however, Elgiloy Specialty Metals, a Division of Combined Metals of Chicago L.L.C., does not recommend or endorse any material for any particular end use or application.
• The data included in this data sheet are typical values and may vary.
• Elgiloy Specialty Metals, a Division of Combined Metals of Chicago L.L.C., makes no representations or warranties, express or implied, as to the accuracy, completeness, condition, suitability, performance, fitness for a particular purpose, or merchantability of any information contained in any data sheet.

In no event will Elgiloy Specialty Metals, a Division of Combined Metals of Chicago L.L.C., be liable for any damages whatsoever arising from the use of the information included in the data sheets.