What is the grade Inconel 718?
Inconel 718 is a Gamma Prime hardened alloy with excellent mechanical properties at both high and low temperatures. Suitable for temperatures up to about 1300 F. Easily machined and age hardened.
Excellent strength from -423°F to 1300°F (-253°C to 705°C). Age hardenable, weldable in the fully aged condition, excellent oxidation resistance up to 1800°F (980°C). Typically sold in the solution annealed condition, but can be ordered aged, cold worked, or cold worked and aged.
Applications
Inconel 718 uses tend to be in the areas of gas turbine components and cryogenic tanks. Jet engines, pump bodies and parts, rocket engines and thrust reversers, nuclear fuel element gaskets, hot extrusion tools. Other common uses are high strength bolts and downhole shafting.
Chemistry
Chemical Requirements |
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|---|---|---|---|---|---|---|---|
|
Ni |
Fe |
Mo |
Mn |
Si |
Cr |
C |
|
|
Max |
55.0 |
Bal |
3.30 |
0.35 |
0.35 |
21.0 |
0.08 |
|
Min |
50.0 |
2.80 |
17.0 |
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Mechanical Property Requirements |
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|---|---|---|---|---|---|
|
Ultimate Tensile |
Yield Strength (0.2% OS) |
Elong. in 2 in. (50mm) or 4D min, % |
R/A |
Hardness Brinell |
|
|
Min |
185 KSi |
150 KSi |
12 |
15 |
331 |
|
Max |
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|
Min |
1275 MPa |
1034 MPa |
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|
Max |
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