511°Csourcestrain point (ASTM C336) - stress-relaxation onset, not a rated service limit
Values for
2024-T4/T351, Kaiser Aluminum sheet, coil & plate typical datasheet; Poisson from MIL-HDBK-5J
Annealed soda-lime-silica float glass, Pilkington North America Technical Bulletin ATS-129 (04/2025)
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 Glass?
Aluminum 2024-T351 is stronger: its yield strength is 324 MPa against tensile strength 41 MPa for Glass (7.9x).
Which is lighter, Aluminum 2024-T351 or Glass?
Glass is lighter: 2,500 kg/m³ against 2,770 kg/m³ for Aluminum 2024-T351.
Which is stiffer, Aluminum 2024-T351 or Glass?
Aluminum 2024-T351 is stiffer: Young's modulus 73.1 GPa against 72 GPa for Glass, 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 Glass?
For the same stiffness or strength: Aluminum 2024-T351 is lighter for a strong rod or tie, strong beam, strong panel or plate; Glass is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate.
Part that must be
Aluminum 2024-T351
Glass
Stiff rod or tie (tension)
9% heavier
lighter
Stiff beam (bending)
10% heavier
lighter
Stiff panel or plate
10% heavier
lighter
Strong rod or tie
lighter
7.13x heavier
Strong beam
lighter
3.58x heavier
Strong panel or plate
lighter
2.54x 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 2024-T351 or Glass?
Aluminum 2024-T351 conducts heat better: 120 W/m·K against 0.937 W/m·K for Glass.
Which expands less with temperature?
Glass expands less: 8.3 µm/m·K against 22.9 µm/m·K for Aluminum 2024-T351.