Nimonic alloy 80A

  • Excellent resistance to corrosion and oxidation
  • Exceptional creep-rupture properties and tensile strength at high temperatures
  • High temperature withstanding ability
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Nimonic 80A is a Nickel-Chromium alloy that is strengthened by Carbon and Titanium additives. It is wrought and age-hardenable, making it suitable for several industrial uses.

The alloy is produced by high-frequency melting and is cast in air. It is known to offer excellent oxidation and corrosion resistance.

This Nimonic alloy finds uses in industries having machines, which operate at high temperatures. It is widely found in turbine blades, nuclear industries, and many more.

Common Names:

  • UNS N07080
  • BS 3076
  • HR 1, 401, 601, 201
  • ASTM B637
  • DIN 17742, 17754

Executive Standards:

Rod, Bar, Wire, and Forging Stock

  • BS 3076 HR1
  • ASTM B 637
  • AECMA PrEn2188, PrEn2189, PrEn2190, PrEn2396, PrEn2397
  • AIR 9165-37

Plate, Sheet, and Strip

  • BS HR 201
  • AECMA PrEn2191

Pipes and Tubes

  • BS HR 401


  • BS HR 1, 601
  • DIN 17742
  • UNS N07080
  • Werkstoff Nr 2.4952, 2.4631
  • MSRR 7095, 7011, 7013
  • HR201, 401, 601
  • NA20
  • VAT80A

Chemical Properties:

  • Nickel (%): 69
  • Chromium (%): 18-21
  • Iron (%): Max 3
  • Cobalt (%): Max 2
  • Titanium (%): 1.8-2.7
  • Aluminum (%): 1.0-1.8
  • Others (%): Remainder

Mechanical Properties:

  • Yield Strength (MPa): 780
  • Yield Strength (ksi):  113
  • Tensile Strength (MPa): 1250
  • Tensile strength (ksi): 181
  • Break Elongation:  30%
  • Hardness (Vickers): 300

Physical Properties:

  • Density: 8.19g/cm3 ; 0.296 Lb/in3
  • Volume Susceptibility: 4.78 x 10-5@ 1000 Gauss
  • Thermal Conductivity @ 20°C: 11.2W/m-°C; 6.47BTU-in/hr-ft2oF
  • Melting point: 2410-2490 oF / 1320-1365oC

Key Features:

  • Great creep-rupture and tensile properties at high temperature: This Nimonic alloy offers great efficiency in handling creep ruptures at higher temperatures without compromising its tensile properties. Thus, it is an excellent choice for numerous heat treatment-based industries.
  • Appreciable corrosion and oxidation resistance: This alloy can resist corrosive agents easily and also prevent oxidation of the components and strengthen its performance.
  • Withstands high temperature: At the high-temperature range, this alloy doesn’t lose its cool. It stays strong and makes sure that the parts made out of it display great endurance without breaking down at high temperatures.

Product Forms Available:

  • Bars
  • Rods
  • Forging stock
  • Pipes
  • Tubes
  • Plates
  • Sheets
  • Strips
  • Extrusions
  • Hexagons
  • Flats
  • Wires


  • Gas turbine blades
  • Automobile exhaust valves
  • Die-casting cores and inserts
  • Parts of nuclear boiler tubes
  • Offshore/ marine industries
  • Aerospace and energy applications

Possible Alternate Grades:

  • Nimonic 75: This Nimonic alloy grade displays excellent heat tolerance and corrosion resistance. Also, it offers high formability and weldability. It finds great usage in manufacturing blades of gas turbines.
  • Nimonic 105: This alloy is extremely ductile and also good in terms of weldability. It can demonstrate high-temperature tolerance and is widely used in multiple industries.

Frequently Asked Questions:

  • Is there any pre-requisite for welding 80A?

A pre-requisite for welding Nimonic 80A is that the metal should be solution-treated.

  • What kind of welding is suitable for this alloy?

Nimonic alloy 80A can be Fusion-welded by Tungsten Inert Gas Welding and Metal Inert Gas Welding.

  • For how much duration should Nimonic 80A be annealed?

Annealing of this alloy should be done for about 8 hours at 1079°C (1975°F).

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