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Nimonic 80A UNS N0780

Nimonic 80A UNS N0780 is a nickel-chromium alloy with good oxidation resistance at higher temperatures, with good resistance in carburizing and chloride containing environments.

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Product Description

Nimonic 80A is a wrought, age-hardenable nickel-chromium alloy, strengthened by additions of titanium, aluminum, and carbon. It is similar to Nimonic 75 but has improved properties due to the additional elements. This alloy is known for its excellent corrosion and oxidation resistance, as well as high tensile strength and creep resistance at elevated temperatures.

Chemical Composition

The typical chemical composition of Nimonic 80A includes:

Carbon (C): 0.04% - 0.10%
Chromium (Cr): 18.0% - 21.0%
Silicon (Si): ≤1.0%
Manganese (Mn): ≤1.0%
Sulfur (S): ≤0.015%
Titanium (Ti): 1.8% - 2.7%
Aluminum (Al): 1.0% - 1.8%
Boron (B): ≤0.008%
Nickel (Ni): Balance.

Physical Properties

Density: 8.15 - 8.19 g/cm³
Melting Point: 1365 - 1405 °C
Coefficient of Thermal Expansion: 12.7 μm/m°C (20 - 100°C)
Modulus of Elasticity: 222 kN/mm²

Mechanical Properties

Tensile Strength: 1200 - 1800 N/mm² (after age hardening)
Yield Strength: 503 - 1500 N/mm² (depending on condition)
Elongation: 17% - 39% (depending on condition)

Applications

Nimonic 80A is widely used in industries where high-temperature performance and corrosion resistance are critical. Typical applications include:

Gas turbine components
Nuclear industry applications (due to its low cobalt content)
Exhaust valves in racing engines
Fasteners and gearboxes.

Processing and Treatment

Nimonic 80A is usually supplied in the solution-treated condition, which facilitates machining. Subsequent age hardening significantly enhances its mechanical properties. The alloy can be readily formed and welded using conventional methods.

Summary

Nimonic 80A is a versatile and high-performance material, suitable for demanding applications in aerospace, energy, and automotive industries. Its excellent resistance to corrosion, oxidation, and high-temperature creep makes it a preferred choice for components exposed to harsh environments

Tensile Data

Mechanical Property Requirements
	Ultimate Tensile	Yield Strength (0.2% OS)	Elong. in 2 in. or 50mm or 4D, min., %	R/A	Hardness
Cold Worked/As worked
Min	110 KSi	85 KSi	10
Max
Min	760 MPa	585 KSi
Max
Hot Worked/As worked
Min	90 KSi	40 KSi	25
Max
Min	620 MPa	275 MPa
Max

D- Forging quality is furnished to chemical requirements and surface inspection only. No mechanical properties required.

Specifications

Form	Standard
Metal Type	UNS N07080
Bar	ASTM B637 AMS 5662
Wire	ASTM B805
Sheet	ASTM B906 AMS 5664
Plate	ASTM B906 AMS 5664
Tube	ASTM B829
Pipe	ASTM B829
Fitting	ASTM B829
Forging	ASTM B670
Weld Wire
Weld Electrode
Din

Machining

Machinability Ratings

MACHINING DATA
Carbide tools are suggested for rates better than 50% of Type 304.
Machining Type	Suggested starting rates are:
Single Point turning :	Roughing - 0.15" depth, 0.015"/rev feed -175 SFM Finishing - 0.025" depth, 0.007"/rev feed - 200 SFM
Drilling :	1/4" Dia hole - 0.004"/rev feed - 60 SFM 1/2" Dia hole - 0.007"/rev feed - 60 SFM 3/4" Dia hole - 0.010"/rev feed - 60 SFM
Reaming :	Feed - same as drilling - 100 SFM
Side and Slot Milling :	Roughing - 0.25" depth - 0.007"/tooth feed - 125SFM Finishing - 0.050" depth - 0.009"/tooth feed - 140SFM
These rates are for carbide tools, Type C-2 for roughing, drilling and reaming. Type C-3 for finishing.

Nimonic 80A UNS N0780

PRODUCTS LIST

Nimonic 80A UNS N0780

Chemical Composition

Physical Properties

Mechanical Properties

Applications

Processing and Treatment

Summary

Chemical Composition

Physical Properties

Mechanical Properties

Applications

Processing and Treatment

Summary

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