Tech Steel & Materials
Nickel Incoloy 909
Inconel 909*/Incoloy 909* is a nickel-cobalt-iron alloy. It has high stability, good strength, constant thermal expansion coefficient, and constant elastic modulus. The combination of low expansion and high strength makes Inconel 909*/Incoloy 909* especially useful for gas turbines. The low expansion enables closer control of clearances and tolerances for greater power output and fuel efficiency. The high strength increases strength-to-weight ratios for lower weight in aircraft engines. For those reasons, Inconel 909*/Incoloy 909* is used for gas-turbine vanes, casings, shafts, and shrouds. The properties of Inconel 909*/Incoloy 909* are attractive also for rocket-engine thrust chambers, ordnance hardware, springs, steam-turbine bolts, gauge blocks, instrumentation, and glass-sealing applications.
The composition of Inconel 909*/Incoloy 909* is designed to provide a low and constant coefficient of thermal expansion. The alloy’s expansion rate is about half the rate of other alloys having comparable strength.
Chemical Properties
| Element |
min |
max |
| Carbon |
- |
0.06 |
Manganese |
- |
1 |
| Silicon |
0.25 |
0.5 |
Phosphorus |
- |
0.015 |
| Sulfur |
- |
0.015 |
Nickel |
35 |
40 |
| Cobalt |
12 |
16 |
Columbium |
1.3 |
5.2 |
| Titanium |
- |
1.8 |
Chromium |
- |
1 |
| Tantalum |
- |
0.05 |
Aluminum |
- |
0.15 |
| Boron |
- |
0.012 |
Copper |
- |
0.5 |
| Iron |
remainder |
Tensile Properties (At Room Temp)
| Property |
Value |
| Tensile Strength |
175 ksi |
Yield Strength at 0.2% Offset |
140 ksi |
| Elongation in 4D |
8% |
Reduction of Area |
12% |
Select AMS Number:
| AMS Number |
Alloy |
Type |
UNS |
Cross Ref. Spec |
Misc./Shape |
| AMS 5884 |
Incoloy 909 |
Nickel |
N19909 |
- |
Bar |
| AMS 5884 |
Incoloy 909 |
Nickel |
N19909 |
- |
Forging |
| AMS 5884 |
Incoloy 909 |
Nickel |
N19909 |
- |
Ring |
| AMS 5892 |
Incoloy 909 |
Nickel |
N19909 |
- |
Sheet |
| AMS 5892 |
Incoloy 909 |
Nickel |
N19909 |
- |
Strip |
| AMS 5893 |
Incoloy 909 |
Nickel |
N19909 |
- |
Bar |
| AMS 5893 |
Incoloy 909 |
Nickel |
N19909 |
- |
Forging |
| AMS 5893 |
Incoloy 909 |
Nickel |
N19909 |
- |
Ring |
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