Inconel 718 is a nickel-iron-based superalloy strengthened by γ'' (Ni₃Nb) precipitates, used extensively in jet engines, gas turbines, and high-temperature aerospace applications requiring strength retention to ~650°C. The F condition is the as-fabricated state (annealed after final fabrication without precipitation hardening), providing lower strength but superior ductility and machinability compared to aged conditions, making it suitable for applications requiring post-delivery aging or intermediate machining operations.
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15 interactive curves for this material
Stress-strain, S-N fatigue and environmental knockdown curves are free with an account.
Create free account| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Compressive Modulus(Ec) | 30,900 | ksi | 22°C · Sheet | ||
Compressive Tangent Modulus vs Stress(Etn(σ)) | Curve (12 pts) | ksi | 21°C · L | ||
Fatigue Crack Growth Rate(da/dN) | Curve (6 pts) | m/cycle | 538°C | ||
Fracture Toughness(KIC) | 94.65 | ksi·√in | — | — | |
Hardness (Vickers)(HV) | 390 | HV | — | — | |
Poisson's Ratio(ν) | 0.2840 | - | — | — | |
Poisson's Ratio vs Temperature(ν(T)) | Curve (17 pts) | - | — | ||
Shear Modulus(G) | 11,400 | ksi | 22°C · Sheet | ||
S–N Curve (Wöhler)(S–N) | — | ksi | 5 entriesClick to expand | ||
Stress Rupture Curve(σr(t)) | Curve (12 pts) | ksi | 538°C | ||
Stress–Strain Curve(σ–ε) | Curve (11 pts) | ksi | 20°C | ||
Stress–Strain Curve (buckling region, ≤ 2% strain)(σ–ε (low-strain)) | Curve (10 pts) | ksi | 21°C · L | ||
Ultimate Tensile Strength(σUTS) | Curve (16 pts) | ksi | L | ||
UTS vs Time (Creep Strength)(Ftu(t)) | Curve (16 pts) | ksi | 538°C | ||
Yield Strength (0.2% offset)(σy) | 171.9 | ksi | AMS 5664 | — | |
Yield Strength vs Temperature(σy(T)) | Curve (8 pts) | ksi | — | ||
Young's Modulus(E) | 24,946.5 | ksi | 649°C | — | |
Young's Modulus vs Temperature(E(T)) | Curve (8 pts) | ksi | — | ||
2 interactive curves for this material
Stress-strain, S-N fatigue and environmental knockdown curves are free with an account.
Create free account| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
CTE vs Temperature(α(T)) | Curve (10 pts) | µin/in·°F | — | ||
Specific Heat Capacity(Cp) | 0.1039 | BTU/(lb·°F) | — | — | |
Thermal Conductivity(k) | 6.587 | BTU/(hr·ft·°F) | 22°C | — | |
Thermal Conductivity vs Temperature(k(T)) | Curve (8 pts) | BTU/(hr·ft·°F) | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 0.2959 | lb/in³ | — | — |