MP35N AMS

Alternative and trade names
MP35N™ - AMS
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Description

MP35N™ is a nickel-cobalt alloy which provides a unique combination of properties including ultra high strength, toughness, ductility, and outstanding corrosion resistance. MP35N™ is produced by vacuum induction melting followed by VAC-ARC remelting to provide exceptional control of chemistry and ingot solidification. MP35N™ has a face centred cubic structure matrix of cobalt and nickel, in which chromium and molybdenum are soluble at elevated temperatures. The FCC structure persists upon cooling to room temperature and below. The combination of the amount of cold work and ageing temperature achieves the final properties desired. For AMS 5844/5 (fully strength/heavily cold worked) material, the alloy is typically aged at 1050ºF for 4 hours.

Equivalent Materials

This material data has been provided by Broder Metals Group.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

Ashby charts

Properties

General

PropertyTemperatureValueComment

Density

23.0 °C

8.43 g/cm³

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Grain size

4 μm

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Maximum, ASTM E112

Mechanical

PropertyTemperatureValueComment

Elongation

23.0 °C

8 %

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ASTM E8, For 50.8mm diameter

Hardness, Rockwell C

23.0 °C

44 [-]

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ASTM E18

Reduction of area

23.0 °C

35 %

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ASTM E8, For 50.8mm diameter

Shear strength

23.0 °C

1034 MPa

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For 25.4mm diameter

Tensile strength

23.0 °C

260 MPa

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ASTM E8, For 50.8mm diameter

Yield strength Rp0.2

23.0 °C

230 MPa

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ASTM E8, For 50.8mm diameter

Chemical properties

PropertyValue

Boron

0.15 %

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Carbon

0.025 %

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Chromium

19 - 21 %

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Cobalt

Balance

Iron

1 %

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Manganese

0.15 %

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Molybdenum

9 - 10.5 %

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Nickel

33 - 37 %

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Phosphorus

0.02 %

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Silicon

0.15 %

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Sulfur

0.01 %

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Titanium

1 %

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Technological properties

Property
Application areas

The high strength variant of MP35N™ is used in a wide range of applications, in aerospace particularly for fasteners and airframe components. Elsewhere MP35N is used in motor sports, medical etc. for fasteners, springs, non-magnetic electrical components, instrument parts, valve components, high pressure door fittings, actuators, seals, shafts and other components.

Corrosion properties

This material has generally excellent corrosion resistance properties, including stress corrosion cracking (SCC) resistance for harsh environments as well as resists attack from mineral acids (nitric, hydrochloric and sulphur). The material also has exceptional resistance to crevice and stress corrosion cracking in hostile environments.