Nimonic 105

UNS N13021 | DIN 2.4634 | ASTM C565 | WS 2.4634 | MSRR 7017 | MSRR 7018 | Nimonic 105 | MSRR 7018


High performance alloys are available in a variety of shapes and contain elements in different combinations to obtain a specific result. These alloys are of three types that include iron-based, cobalt-based and nickel-based alloys. The nickel-based and cobalt-based super alloys are available as cast or wrought based alloys based on composition and application.

Super alloys have good oxidation and creep resistance and can be strengthened by precipitation hardening, solid-solution hardening and work hardening methods. They can also function under high mechanical stress and high temperatures and also in places that require high surface stability

Nimonic 105 is a nickel-cobalt-chromium alloy. The following datasheet provides an overview of Nimonic 105.

Chemical Composition

The chemical composition of Nimonic 105 is outlined in the following table.

Element Content (%)
Nickel, Ni 51
Cobalt, Co 18-22
Chromium, Cr 14-15.7
Molybdenum, Mo 4.50-5.50
Aluminum, Al 4.50-4.90
Iron, Fe  1
Manganese, Mn  1
Silicon, Si  1
Titanium, Ti 0.90-1.50
Copper, Cu 0.20
Zirconium, Zr  0.15
Carbon, C  0.12
Sulfur, S  0.010
Boron, B 0.0030-0.010

Physical Properties

The following table shows the physical properties of Nimonic 105.

Properties Metric Imperial
Density 8.01 g/cm³ 0.289 lb/in³
Melting point 1327°C 2420°F

Mechanical Properties

The mechanical properties of Nimonic 105 are displayed in the following table.

Properties Metric Imperial
Tensile strength (precipitation hardened, value at room temperature) 1150 MPa 167000 psi
Yield strength (precipitation hardened, value at room temperature, @strain 0.200%) 770 MPa 112000 psi
Elongation at break (precipitation hardened) 25% 25%

Thermal Properties

The thermal properties of Nimonic 105 are given in the following table.

Properties Metric Imperial
Thermal expansion co-efficient (@20-100°C/68-212°F) 12.2 µm/m°C 6.78 µin/in°F
Thermal conductivity 10.89 W/mK 75.58 BTU in/hr.ft².°F


Nimonic 105 can be solution heat treated at 1149°C (2100°F) and then cooled in air.

Cold Working

Standard tooling methods are used for cold working Nimonic 105. Usage of plain carbon steels is not recommended as they may produce galling. Galling can be reduced by the usage of soft die materials and heavy duty lubricants.


Welding techniques recommended for Nimonic 105 include gas-tungsten arc welding, gas metal-arc welding, submerged-arc welding and shielded metal-arc welding. Usage of a matching alloy filler metal is recommended for the welding process and if a matching filler is absent, an alloy rich in Ni, Co, Cr, Mo is can be used. during the absence of a matching filler metal.


Conventional methods and heavy-duty lubricants are used for the forming process of Nimonic 105 that as it has good ductility. A powerful equipment is recommended for this alloy as it is stronger than the commonly available steels.


Nimonic 105 is can be machined by conventional machining methods. This alloy has higher levels of gumminess and strength, and is work-hardened during the machining process. Tooling and usage of a heavy duty machining equipment during the machining process enables minimizing work-hardening or chatter of this alloy before the cutting process. Heavy lubricants are suitable for boring, tapping, drilling or broaching operations, and coolants that are water-based are recommended for high speed operations like milling, grinding or turning.

Heat Treatment

Nimonic 105 can be heat treated in 4 four steps. The steps are as follows:

  • Solution annealing for 4 h at 1149°C (2100°F) followed by air cooling.
  • Heating for 16 h at 1056°C (1925°F) followed by air cooling.
  • Heating for 16 h at 849°C (1560°F).
  • Air cooling to reach precipitation-hardening.


Nimonic 105 is used for high temperature gas turbine components.


UNS N13021
DIN 2.4634
WS 2.4634
MSRR 7017
MSRR 7018
Nimonic 105


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