2024-T4/T351, Kaiser Aluminum sheet, coil & plate typical datasheet; Poisson from MIL-HDBK-5J
Celanese Fortron 1140L4 (PPS, 40% glass fibre), injection moulding; FORTRON PPS Short-Term Properties Guide (PPS-012, 2016); thermal conductivity and Poisson for 40% glass-reinforced Fortron from the Fortron PPS Design Manual (PPS-050, 2013).
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 2024-T351 stronger than Plastic PPS GF40?
Aluminum 2024-T351 is stronger: its yield strength is 324 MPa against tensile strength 195 MPa for Plastic PPS GF40 (1.66x).
Which is lighter, Aluminum 2024-T351 or Plastic PPS GF40?
Plastic PPS GF40 is lighter: 1,650 kg/m³ against 2,770 kg/m³ for Aluminum 2024-T351.
Which is stiffer, Aluminum 2024-T351 or Plastic PPS GF40?
Aluminum 2024-T351 is stiffer: Young's modulus 73.1 GPa against 14.7 GPa for Plastic PPS GF40, so the same part in Aluminum 2024-T351 deflects less under the same load.
Which is lighter for the same job, Aluminum 2024-T351 or Plastic PPS GF40?
For the same stiffness or strength: Aluminum 2024-T351 is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate; Plastic PPS GF40 is lighter for a strong rod or tie, strong beam, strong panel or plate.
Part that must be
Aluminum 2024-T351
Plastic PPS GF40
Stiff rod or tie (tension)
lighter
2.96x heavier
Stiff beam (bending)
lighter
33% heavier
Stiff panel or plate
lighter
2% heavier
Strong rod or tie
1% heavier
lighter
Strong beam
20% heavier
lighter
Strong panel or plate
30% 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 2024-T351 or Plastic PPS GF40?
Aluminum 2024-T351 conducts heat better: 120 W/m·K against 0.2 W/m·K for Plastic PPS GF40.
Which expands less with temperature?
Plastic PPS GF40 expands less: 12 µm/m·K against 22.9 µm/m·K for Aluminum 2024-T351.