Materials / Compare
Titanium vs. Zinc Zamak 3
Compare Titanium 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 | 885MPasourcetypical, plate (>0.187 in), annealed, 0.2% offset | 221MPasourcetypical |
| Ultimate tensile strength | 940MPasourcetypical, plate, annealed | 283MPasourcetypical |
| Elongation at break | 16%sourcetypical, in 2 in., plate annealed | 10%sourcetypical, in 2 in. |
| Young's modulus (stiffness) | 107–122GPasourcetypical range, 20 °C | 85.5GPasourcetypical |
| Density | 4,430kg/m³sourcenominal | 6,600kg/m³sourcetypical |
| Strength to weight | 200kN·m/kg5.97x higher | 33.5kN·m/kg |
| Stiffness to weight | 25.8MN·m/kg2x higher | 13MN·m/kg |
| Poisson's ratio | 0.342sourcemean of TIMET measurements | 0.27sourcetypical, Zamak 3 hot-chamber die cast |
| Shear modulus | 42.7GPa27% stiffer in shear | 33.7GPa |
| Bulk modulus | 121GPa | 62GPa |
| Speed of sound | 5,084m/s | 3,599m/s |
| Thermal | ||
| Thermal conductivity | 6.6W/m·Ksourcetypical, 20 °C, mill annealed | 113W/m·Ksourcetypical |
| Thermal expansion | 9µm/m·Ksourcetypical, mean 0-100 °C | 27.4µm/m·Ksourcetypical |
| 100 mm part over a 50 °C swing | 45µm growth3.04x less | 137µm growth |
| Specific heat | 580J/kg·Ksourcetypical, 20 °C | 419J/kg·Ksourcetypical |
| Heats up and cools (diffusivity) | 2.57mm²/s | 40.9mm²/s15.9x faster |
| Thermal shock resistance | 3,730W/m | 7,782W/m2.09x more resistant |
| Melting point | 1,630–1,650°Csourcemelting range | 381–387°Csourcemelting range |
| Max service temperature | 400°Csourceupper recommended use temperature | not sourced |
| Values for | TIMETAL 6-4 (Ti-6Al-4V Grade 5) annealed plate typical (TIMET properties manual) + TIMET datasheet TMC-0150 physical properties | 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 Titanium stronger than Zinc Zamak 3?
Titanium is stronger: its yield strength is 885 MPa against 221 MPa for Zinc Zamak 3 (4x).
Which is lighter, Titanium or Zinc Zamak 3?
Titanium is lighter: 4,430 kg/m³ against 6,600 kg/m³ for Zinc Zamak 3.
Which is stiffer, Titanium or Zinc Zamak 3?
Titanium is stiffer: Young's modulus 115 GPa against 85.5 GPa for Zinc Zamak 3, so the same part in Titanium deflects less under the same load.
Which is lighter for the same job, Titanium or Zinc Zamak 3?
For the same stiffness or strength: Titanium 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 | Titanium | Zinc Zamak 3 |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 2x heavier |
| Stiff beam (bending) | lighter | 1.72x heavier |
| Stiff panel or plate | lighter | 1.64x heavier |
| Strong rod or tie | lighter | 5.97x heavier |
| Strong beam | lighter | 3.76x heavier |
| Strong panel or plate | lighter | 2.98x 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, Titanium or Zinc Zamak 3?
Zinc Zamak 3 conducts heat better: 113 W/m·K against 6.6 W/m·K for Titanium.
Which expands less with temperature?
Titanium expands less: 9 µm/m·K against 27.4 µm/m·K for Zinc Zamak 3.