Materials / Compare
Aluminum 7050-T7451 vs. Plastic Nylon PA66
Compare Aluminum 7050-T7451 vs. Plastic Nylon PA66 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 | 469MPasourcetypical, longitudinal, 0.2% offset | 85MPasourcetypical, dry |
| Ultimate tensile strength | 524MPasourcetypical, longitudinal | not sourced |
| Elongation at break | 11%sourcetypical, longitudinal | 30%sourcenominal strain at break, dry |
| Young's modulus (stiffness) | 70.3GPasourcetypical | 3GPasourcetypical, dry |
| Density | 2,830kg/m³sourcenominal | 1,130kg/m³sourcetypical |
| Strength to weight | 166kN·m/kg2.2x higher | 75.2kN·m/kg |
| Stiffness to weight | 24.8MN·m/kg9.36x higher | 2.65MN·m/kg |
| Poisson's ratio | 0.33sourcetypical (handbook physical constant) | 0.4sourcebase material: unfilled polyamide (PA), conditioned, maker design-guide family value (Covestro Table 3-1) |
| Shear modulus | 26.4GPa24.7x stiffer in shear | 1.07GPa |
| Bulk modulus | 68.9GPa | 5GPa |
| Speed of sound | 4,984m/s | 1,629m/s |
| Thermal | ||
| Thermal conductivity | 157W/m·Ksourcetypical, 20 °C | 0.33W/m·Ksourcetypical |
| Thermal expansion | 23.5µm/m·Ksourcetypical, mean 20-100 °C | 98µm/m·Ksourcelongitudinal, 23-55 °C |
| 100 mm part over a 50 °C swing | 118µm growth4.17x less | 490µm growth |
| Specific heat | 860J/kg·Ksourcetypical, at 100 °C | 1,700J/kg·Ksourcetypical |
| Heats up and cools (diffusivity) | 64.5mm²/s376x faster | 0.172mm²/s |
| Thermal shock resistance | 29,862W/m522x more resistant | 57.2W/m |
| Melting point | 524–635°Csourcemelting range | 260°CsourceDSC |
| Max service temperature | not sourced | 101°CsourceIEC 60216 temperature index, 20000 h |
| Values for | 7050-T7451 plate, Kaiser Aluminum sheet, coil & plate typical datasheet (longitudinal); Poisson from MIL-HDBK-5J | BASF Ultramid A3K (PA66, unreinforced injection-moulding grade), Product Information 02/2026, dry values (ISO methods) |
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 7050-T7451 stronger than Plastic Nylon PA66?
Aluminum 7050-T7451 is stronger: its yield strength is 469 MPa against 85 MPa for Plastic Nylon PA66 (5.52x).
Which is lighter, Aluminum 7050-T7451 or Plastic Nylon PA66?
Plastic Nylon PA66 is lighter: 1,130 kg/m³ against 2,830 kg/m³ for Aluminum 7050-T7451.
Which is stiffer, Aluminum 7050-T7451 or Plastic Nylon PA66?
Aluminum 7050-T7451 is stiffer: Young's modulus 70.3 GPa against 3 GPa for Plastic Nylon PA66, so the same part in Aluminum 7050-T7451 deflects less under the same load.
Which is lighter for the same job, Aluminum 7050-T7451 or Plastic Nylon PA66?
For the same stiffness or strength: Aluminum 7050-T7451 is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam; Plastic Nylon PA66 is lighter for a strong panel or plate.
| Part that must be | Aluminum 7050-T7451 | Plastic Nylon PA66 |
|---|---|---|
| Stiff rod or tie (tension) | lighter | 9.36x heavier |
| Stiff beam (bending) | lighter | 1.93x heavier |
| Stiff panel or plate | lighter | 14% heavier |
| Strong rod or tie | lighter | 2.2x heavier |
| Strong beam | lighter | 25% heavier |
| Strong panel or plate | 7% 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 7050-T7451 or Plastic Nylon PA66?
Aluminum 7050-T7451 conducts heat better: 157 W/m·K against 0.33 W/m·K for Plastic Nylon PA66.
Which expands less with temperature?
Aluminum 7050-T7451 expands less: 23.5 µm/m·K against 98 µm/m·K for Plastic Nylon PA66.