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Nickel Alloys for Aerospace Applications

Nickel Alloys for Aerospace Applications

There exists an extensive variety of nickel based alloys which are widely used in aerospace engineering.
These nickel alloys for aerospace use are selected based on their ability to resist extremely high temperature oxidation/corrosion, stress-rupture failures and constant wear.

Nickel alloys are one of the toughest structural materials available. They also have a good electrical conductivity and magnetic properties. For these reasons, a choice to use nickel alloys are almost inevitable when it comes to aerospace applications. The following is a breakdown of some of the most advantageous properties which make Nickel alloys so vital for aerospace applications:

  • Immense strength at extremely high temperatures
  • Resistance to oxidation and corrosion
  • Creep resistance under high stress conditions

  • Weight-saving alloys
  • Low-expansion at high temperatures

Immense Strength At Extremely High Temperatures

WASPALOY® is a great example of nickel alloys used in aerospace. The alloy provides strength and structural reliability at high temperatures, as this alloy remains structurally sound at temperatures as high as 870°C. As a result of Wasaploy’s great temperature resistance, it is routinely used in the exhaust section of an aircraft where burning jet fuel can cause parts to become immensely hot for extended periods of time. Other nickel alloys commonly used in the ‘hot section’ are Alloy 25, 188, 282®, 625, 718, X and Rene 41. (* ‘hot section’ refers to combustion chambers and exhaust systems of an aircraft).

RESISTANCE TO OXIDATION AND CORROSION

Alloy 230, C263, 617, 625, X, X-750 and 75 have superb resistance in extremely high-stressed and high temperature environments, such as those found in pressure vessels, rocket engines, gas turbines and other aircraft structures.
Alloy X-750 for example, being precipitation hardened with elements such as aluminium and titanium, can withstand very high levels of oxidation and corrosion which are often commonplace in numerous parts of an aircraft engine.
Alloys 230, C263, 617, 625, X, X-750 and 75 are alloys of choice for the ‘cold section’ of an aircraft engine
where air inlet gets compressed before being combusted.

CREEP RESISTANCE UNDER HIGH STRESS CONDITIONS

Apart from the superalloy mentioned above, other nickel alloys for aerospace applications such as Nimonic®80A and Nimonic®90 have exceptional creep resistance and stress-rupture properties. This alloys’ ability to retain its fortitude under high degrees of stress and at temperatures from 815-920°C makes it extremely useful for the construction of aircraft exhaust valves, turbine rotors and other rotating parts.

WEIGHT-SAVING ALLOYS

Because you cannot afford to add any unnecessary weight on an aircraft, strong but light-weight alloys such
as titanium grade 5 or Ti 6AL-4V and Ti 6-2-4-2 are a popular choice for a manufacture of discs, ducts, fans
and front bearing housing in the turbine engine.



Download PDF For Ti 6Al-4V (Grade 5)Download


Download PDF For Ti 6-2-4-2Download


LOW-EXPANSION AT HIGH TEMPERATURES

Alloy 36 is a nickel and iron based alloy (containing 36% nickel) which is used mainly in lay-up tooling for aerospace composite parts and structures. Alloy 36’s main advantage is its extremely low levels of expansion at temperatures of 260°C and above, allowing this alloy to consistently retain its shape and strength in the moulding process. Its application within the field of aerospace includes the formation of composites, thermostat rods, measuring devices, laser components and tanks and piping for liquefied gas storage.

Product FormSize Range FromSize Range To
Alloy 36 round bar6 mm50.8 mm
Alloy 36 sheet & plate6.35 mm152.4 mm
Alloy 36 Welding wire1.14 mm3.18 mm

NeoNickel can save you time and money by supplying these alloys in various forms including cut
pieces, high-precision profiles and welding consumables. We also offer complimentary
technical service to our customers.

Contact us now to discuss about your requirements!

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