Materials / Compare
Nickel Inconel 718 vs. Zinc Zamak 3
Compare Nickel Inconel 718 vs. Zinc Zamak 3 strength, stiffness, weight and thermal properties.
| Try it on a partA bracket to run stress or thermal on, free in your browser | Open in LessCAD | Open in LessCAD |
|---|---|---|
| Mechanical | ||
| Yield strength | 1,207MPasourcetypical, 1.0 in. hot-rolled bar, 0.2% offset | 221MPasourcetypical |
| Ultimate tensile strength | 1,389MPasourcetypical, 1.0 in. bar | 283MPasourcetypical |
| Elongation at break | 20%sourcetypical, 1.0 in. bar | 10%sourcetypical, in 2 in. |
| Young's modulus (stiffness) | 200GPasourcetypical, 21 °C, annealed + aged | 85.5GPasourcetypical |
| Density | 8,221kg/m³sourcenominal, annealed and aged | 6,600kg/m³sourcetypical |
| Strength to weight | 147kN·m/kg4.38x higher | 33.5kN·m/kg |
| Stiffness to weight | 24.3MN·m/kg1.88x higher | 13MN·m/kg |
| Poisson's ratio | 0.294sourcetypical, 21 °C, annealed + aged | 0.27sourcetypical, Zamak 3 hot-chamber die cast |
| Shear modulus | 77.3GPa2.3x stiffer in shear | 33.7GPa |
| Bulk modulus | 162GPa | 62GPa |
| Speed of sound | 4,932m/s | 3,599m/s |
| Thermal | ||
| Thermal conductivity | 11.4W/m·Ksourcetypical, 21 °C, annealed + aged (calculated from resistivity per footnote a) | 113W/m·Ksourcetypical |
| Thermal expansion | 13.2µm/m·Ksourcetypical, mean 21-93 °C, annealed + aged | 27.4µm/m·Ksourcetypical |
| 100 mm part over a 50 °C swing | 66µm growth2.08x less | 137µm growth |
| Specific heat | 435J/kg·Ksourcetypical, 21 °C | 419J/kg·Ksourcetypical |
| Heats up and cools (diffusivity) | 3.19mm²/s | 40.9mm²/s12.8x faster |
| Thermal shock resistance | 3,680W/m | 7,782W/m2.11x more resistant |
| Melting point | 1,260–1,336°Csourcemelting range | 381–387°Csourcemelting range |
| Max service temperature | 704°Csourceupper use temperature stated by producer | not sourced |
| Values for | 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 | Zamak 3 (ASTM B86 die cast), Nathan Trotter (zinc alloy producer) technical data sheet, 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 Nickel Inconel 718 stronger than Zinc Zamak 3?
Nickel Inconel 718 is stronger: its yield strength is 1,207 MPa against 221 MPa for Zinc Zamak 3 (5.46x).
Which is lighter, Nickel Inconel 718 or Zinc Zamak 3?
Zinc Zamak 3 is lighter: 6,600 kg/m³ against 8,221 kg/m³ for Nickel Inconel 718.
Which is stiffer, Nickel Inconel 718 or Zinc Zamak 3?
Nickel Inconel 718 is stiffer: Young's modulus 200 GPa against 85.5 GPa for Zinc Zamak 3, so the same part in Nickel Inconel 718 deflects less under the same load.
Which is lighter for the same job, Nickel Inconel 718 or Zinc Zamak 3?
For the same stiffness or strength: Nickel Inconel 718 is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate.
| Part that must be | Nickel Inconel 718 | Zinc Zamak 3 |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 1.88x heavier |
| Stiff beam (bending) | lighter | 23% heavier |
| Stiff panel or plate | lighter | 7% heavier |
| Strong rod or tie | lighter | 4.38x heavier |
| Strong beam | lighter | 2.49x heavier |
| Strong panel or plate | lighter | 1.88x heavier |
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, Nickel Inconel 718 or Zinc Zamak 3?
Zinc Zamak 3 conducts heat better: 113 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 27.4 µm/m·K for Zinc Zamak 3.