Materials / Compare
Aluminum 1100-O vs. Nickel Inconel 718
Compare Aluminum 1100-O vs. Nickel Inconel 718 strength, stiffness, weight and thermal properties.
| Try it on a partA sample part to run stress or thermal on, free in your browser | Open in LessCAD | Open in LessCAD |
|---|---|---|
| Mechanical | ||
| Yield strength | 35MPasourcetypical, O, 0.0625 in specimen | 1,207MPasourcetypical, 1.0 in. hot-rolled bar, 0.2% offset |
| Ultimate tensile strength | 90MPasourcetypical, O | 1,389MPasourcetypical, 1.0 in. bar |
| Elongation at break | 35%sourcetypical, O, in 4D | 20%sourcetypical, 1.0 in. bar |
| Young's modulus (stiffness) | 69GPasourcetypical | 200GPasourcetypical, 21 °C, annealed + aged |
| Density | 2,710kg/m³sourcenominal, 20 °C | 8,221kg/m³sourcenominal, annealed and aged |
| Strength to weight | 12.9kN·m/kg | 147kN·m/kg11.4x higher |
| Stiffness to weight | 25.5MN·m/kg5% higher | 24.3MN·m/kg |
| Poisson's ratio | not sourced | 0.294sourcetypical, 21 °C, annealed + aged |
| Shear modulus | not sourced | 77.3GPa |
| Bulk modulus | not sourced | 162GPa |
| Speed of sound | 5,046m/s | 4,932m/s |
| Thermal | ||
| Thermal conductivity | 222W/m·Ksourcetypical, O, 20 °C | 11.4W/m·Ksourcetypical, 21 °C, annealed + aged (calculated from resistivity per footnote a) |
| Thermal expansion | 23.6µm/m·Ksourcetypical, mean 20-100 °C | 13.2µm/m·Ksourcetypical, mean 21-93 °C, annealed + aged |
| 100 mm part over a 50 °C swing | 118µm growth | 66µm growth1.79x less |
| Specific heat | 901J/kg·Ksourcebase material: commercially pure aluminium EN AW-1050A (Hydro), 20 °C | 435J/kg·Ksourcetypical, 21 °C |
| Heats up and cools (diffusivity) | 90.9mm²/s28.5x faster | 3.19mm²/s |
| Thermal shock resistance | not sourced | 3,680W/m |
| Melting point | 640–655°Csourcemelting range | 1,260–1,336°Csourcemelting range |
| Max service temperature | not sourced | 704°Csourceupper use temperature stated by producer |
| Values for | 1100-O (annealed) commercially pure aluminium, Kaiser Aluminum Tube & Pipe Alloy 1100 Technical Data (Rev. 05/06), typical properties; specific heat from Hydro EN AW-1050A (99.5% Al) extruded-products datasheet (10/2018). | INCONEL alloy 718, standard grade, 1750 °F/1 hr anneal + 1325 °F/8 hr F.C. to 1150 °F aged; Special Metals bulletin SMC-045 typical values |
Every value links to the document that states it. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.
Questions
Is Aluminum 1100-O stronger than Nickel Inconel 718?
Nickel Inconel 718 is stronger: its yield strength is 1,207 MPa against 35 MPa for Aluminum 1100-O (34.5x).
Which is lighter, Aluminum 1100-O or Nickel Inconel 718?
Aluminum 1100-O is lighter: 2,710 kg/m³ against 8,221 kg/m³ for Nickel Inconel 718.
Which is stiffer, Aluminum 1100-O or Nickel Inconel 718?
Nickel Inconel 718 is stiffer: Young's modulus 200 GPa against 69 GPa for Aluminum 1100-O, so the same part in Nickel Inconel 718 deflects less under the same load.
Which is lighter for the same job, Aluminum 1100-O or Nickel Inconel 718?
For the same stiffness or strength: Aluminum 1100-O is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate; Nickel Inconel 718 is lighter for a strong rod or tie, strong beam, strong panel or plate.
| Part that must be | Aluminum 1100-O | Nickel Inconel 718 |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 5% heavier |
| Stiff beam (bending) | lighter | 1.78x heavier |
| Stiff panel or plate | lighter | 2.13x heavier |
| Strong rod or tie | 11.4x heavier | lighter |
| Strong beam | 3.49x heavier | lighter |
| Strong panel or plate | 1.94x heavier | lighter |
For the same stiffness or strength, mass scales with density over stiffness (or strength) raised to a power set by how the part is loaded: 1 for a rod in tension, 1/2 for a beam in bending, 1/3 for a panel (the standard material-selection indices).
Which conducts heat better, Aluminum 1100-O or Nickel Inconel 718?
Aluminum 1100-O conducts heat better: 222 W/m·K against 11.4 W/m·K for Nickel Inconel 718.
Which expands less with temperature?
Nickel Inconel 718 expands less: 13.2 µm/m·K against 23.6 µm/m·K for Aluminum 1100-O.