MP35N Cobalt Based Alloy

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Cobalt-nickel-chromium-molybdenum alloy

MP35N Cobalt Based Alloy

Physical and Mechanical Properties

Density

8.43g/cm³

Melting point

1440°C

Tensile strength

1380MPa

Yield strength

1240MPa

Elongation

10%

Standard Specifications

AMS5758, AMS5844, AMS5845, ANSI/ASTM F562

MP35N is an age-hardenable nickel-cobalt-chromium-molybdenum alloy that offers a unique combination of ultra-high strength, toughness, ductility, and exceptional corrosion resistance. It withstands corrosion in hydrogen sulfide, saltwater, and other chloride solutions, and exhibits excellent resistance to crevice and stress corrosion cracking in seawater and harsh environments. The alloy's four constituent elements form the foundation for corrosion resistance in most stainless steel, nickel, and cobalt-based alloys used across industries. MP35N is ideal for applications requiring a high combination of strength, high modulus values, and superior corrosion resistance.

Features

High strength at ambient temperatures: Capable of maintaining superior mechanical properties without the need for elevated operating temperatures.
Excellent ductility and mechanical performance: Provides flexibility and toughness while retaining structural integrity.
Outstanding resistance to hydrogen sulfide corrosion: Suitable for sour gas environments and downhole applications.
Exceptional seawater and stress corrosion resistance: Performs reliably in marine conditions with minimal risk of cracking or degradation.

Application

Medical devices: Used in high-performance components such as orthopedic implants and surgical tools where strength and biocompatibility are essential.
Chemical industry: Applied in the manufacturing of corrosion-resistant equipment and parts operating under high pressure and temperature.
Oil and gas wells: Used in the production of drill pipes, valves, and downhole tools engineered to withstand harsh subterranean conditions.
Precision instruments: Ideal for manufacturing instrument components that require both high mechanical strength and corrosion resistance.

Chemical compositions

Element	Min. %	Max. %
C	-	0.03
P	-	0.015
Si	-	0.15
Ni	33	37
Co	Bal
Mn	-	0.15
S	-	0.01
Cr	19	21
Mo	9	10.5
Ti	-	1
Fe	-	1

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