NIMONIC alloys are primarily composed of nickel and chromium. These alloys are known for their high-temperature low-creep and high performance.

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NIMONIC alloys are primarily composed of nickel and chromium. These alloys are known for their
high-temperature low-creep and high performance.
Physical Properties
The following table discusses the physical properties of NIMONIC alloy 80A.
Properties Metric Imperial
Density 8.19 gm/cm30.296 lb/in3
Mechanical Properties
The mechanical properties of NIMONIC alloy 80A are tabulated below.
Properties Metric Imperial
Tensile strength(annealed) 1250 MPa 181 ksi
Yield strength(annealed) 780 MPa 113 ksi
Elongation at Break 30% 30%
Other Designations
Some of the other designations that are used to denote NIMONIC alloy 80A are as below:-
 UNS N07080
 BS 3076

2.  HR1
 HR401
 HR601
 HR201
 ASTM B637
 DIN 17742
 DIN17754
Fabrication Machinability
The conventional machining techniques used on iron alloys may be used for this alloy. This alloy
work-hardens during machining.
Welding
NIMONIC alloy 80A can be welded using common techniques, using a matching filler metal. A
prerequisite for welding is that the metal should be solution treated. Fusion welding by tungsten
inert gas welding and metal inert gas welding will be suitable for this alloy.
Hot working
NIMONIC alloy 80A can be hot worked at temperature ranges of 1050-1200°C (1920-2190°F).
Forging
NIMONIC alloy 80A can be hot forged at temperatures in the range of 982-1176°C (1800-
2150°F).
Cold working
Cold working may be done on the alloy.
Annealing
NIMONIC alloy 80A should be annealed at 1079°C (1975°F) for about 8 hours and air cooled.
Applications
The NIMONIC alloy 80A , 75 , 90 , 263 is used in the following applications:
 Gas turbine engineering
 Automobile exhaust valves
 Die-casting inserts and cores
 Nuclear boiler tube parts.