Description of Tubes Made from the High-Performance Nickel Alloy MP35N
MP35N is an austenitic Ni-Co-Cr-Mo alloy that exhibits high mechanical strength and excellent corrosion resistance. It resists stress corrosion and harsh environmental conditions, thereby resulting in its use as a fastener or spring material. MP35N withstands corrosion in hydrogen sulphide, salt water and other chloride solutions. Given these characteristics, it is often selected for components and parts in marine environments, for example in cables that house sensors for deep-sea measurements. It is also utilised in the automotive and aerospace industries.

Advantages
- Excellent resistance to corrosion
- High strength and ductility
- Good mechanical properties at ambient temperatures
- High resistance to pitting and stress corrosion cracking
Specifications for Tubes Made from the High-Performance Nickel Alloy MP35N
Composition Range (UNS R 300035)
|
Element
|
Weight-%
|
Element
|
Weight-%
|
Cobalt
|
30.0 Minimum
|
Chromium
|
19.0-21.0
|
Nickel
|
33.0-37.0
|
Molybdenum
|
9.0-15
|
Titanium
|
1.0
|
Iron
|
1.0
|
Carbon
|
0.025
|
Manganese
|
0.15
|
Phosphorus
|
0.015
|
Sulphur
|
0.01
|
Silicon
|
0.15
|
|
|
Maximum %, where no range is provided
|
Melting Range
|
2400-2625°F
|
1315-1440°C
|
Modulus of Elasticity, RT2
|
34 x 10⁶ psi
|
234 x 10³ MPa
|
Poisson's Ratio
|
0.4
|
0.4
|
Coefficient of Thermal Expansion
|
7.4 x 10⁻⁶ /°F
|
13.5 x 10⁻⁶ /°C
|
Electrical Resistivity at RT
|
40.7 µΩ in.
|
103.3 µΩ cm
|
Thermal Conductivity
|
7.77 BTU/hr-ft-°F
|
13.4 W/m-K
|
Density
|
304 lb/in³
|
8.41 g/cm³
|
Relative Magnetic Permeability
|
1.0009 μ
|
1.0009µ
|
Specific Heat
|
0.18 BTU/lb-F
|
753 J/kg-K
|
Condition
|
Approx. Tensile Strength
|
Approx. Operating Temperature
|
N/mm²
|
ksi
|
°C
|
F
|
Annealed
|
800-1000
|
116-1450
|
-200 to +315
|
-330 to +600
|
Spring Tempered
|
1400-1900
|
203-276
|
-200 to +315
|
-330 to +600
|
Spring Tempered + Age Hardened
|
1900-2200
|
276-319
|
-200 to +315
|
-330 to +600
|
Standards
AMS 5758
AMS 5844
AMS 5845
ASTM F-562
Applications for Tubes Made from the High-Performance Nickel Alloy MP35N
- Fastening elements for aircraft
- Conductor cables for downhole instrumentation
- Biomedical devices
- Applications with high fatigue resistance