Materials / Compare
Aluminum ADC12 vs. Plastic PTFE
Compare Aluminum ADC12 vs. Plastic PTFE 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 | 149MPasourceone test result, 0.2% proof stress, as cast, ASTM tensile bar (Daiki) | 9MPasourcetypical yield strength at 23 °C (Teflon PTFE, Table 8) |
| Ultimate tensile strength | 345MPasourceone test result, as cast, ASTM tensile bar (Daiki) | 39.3MPasourcetypical, skived tape 0.13 mm |
| Elongation at break | 2.3%sourceone test result, as cast, ASTM tensile bar (Daiki) | 350%sourcetypical, skived tape 0.13 mm |
| Young's modulus (stiffness) | 79.8GPasourcestandard value (S.S.Aluminum) | not sourced |
| Density | 2,680kg/m³sourcemeasured (Daiki) | 2,160kg/m³sourcetypical (standard specific gravity, ASTM D4894) |
| Strength to weight | 55.6kN·m/kg13.3x higher | 4.17kN·m/kg |
| Stiffness to weight | 29.8MN·m/kg | not sourced |
| Poisson's ratio | not sourced | 0.46sourcetypical, 23 °C (Teflon PTFE resins, Chemours handbook) |
| Shear modulus | not sourced | not sourced |
| Bulk modulus | not sourced | not sourced |
| Speed of sound | 5,457m/s | not sourced |
| Thermal | ||
| Thermal conductivity | 125W/m·Ksourcemeasured on specimens cut from a 50 x 100 x 5 mm flat die casting (Daiki) | 0.25W/m·Ksourcetypical, granular resin, 4.6 mm specimen |
| Thermal expansion | 21µm/m·Ksourcemeasured, temperature range not stated (Daiki) | 100µm/m·Ksourcetypical, granular resin, 23-60 °C (ASTM E228) |
| 100 mm part over a 50 °C swing | 105µm growth4.76x less | 500µm growth |
| Specific heat | 911J/kg·Ksourcemeasured (Daiki) | 1,400J/kg·Ksourcetypical, granular resin, 20 °C (ASTM D4591) |
| Heats up and cools (diffusivity) | 51.2mm²/s619x faster | 0.0827mm²/s |
| Thermal shock resistance | not sourced | not sourced |
| Melting point | 515–582°Csourcesolidus-liquidus (Daiki) | 327°Csourcesecond melting peak (sintered polymer), +/-10 |
| Max service temperature | not sourced | 260°Csourceservice temperature (Chemours general Teflon PTFE statement) |
| Values for | JIS ADC12 (Al-Si-Cu, about A383 / EN AC-46100) high-pressure die-casting alloy, as cast; physical properties from Daiki Aluminium Industry (ADC12 ingot producer) measured values; modulus from S.S.Aluminum (ADC12 ingot producer) standard values. | Chemours Teflon PTFE 7C X granular molding resin, typical values (tensile/elongation measured on 0.13 mm skived tape) |
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 ADC12 stronger than Plastic PTFE?
Aluminum ADC12 is stronger: its yield strength is 149 MPa against 9 MPa for Plastic PTFE (16.6x).
Which is lighter, Aluminum ADC12 or Plastic PTFE?
Plastic PTFE is lighter: 2,160 kg/m³ against 2,680 kg/m³ for Aluminum ADC12.
Which is lighter for the same job, Aluminum ADC12 or Plastic PTFE?
For the same stiffness or strength: Aluminum ADC12 is lighter for a strong rod or tie, strong beam, strong panel or plate.
| Part that must be | Aluminum ADC12 | Plastic PTFE |
|---|---|---|
| Strong rod or tie | lighter | 13.3x heavier |
| Strong beam | lighter | 5.24x heavier |
| Strong panel or plate | lighter | 3.28x 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, Aluminum ADC12 or Plastic PTFE?
Aluminum ADC12 conducts heat better: 125 W/m·K against 0.25 W/m·K for Plastic PTFE.
Which expands less with temperature?
Aluminum ADC12 expands less: 21 µm/m·K against 100 µm/m·K for Plastic PTFE.