6061-T6/T651, Kaiser Aluminum typical properties (sheet, coil & plate datasheet); Poisson from MIL-HDBK-5J
A380 aluminium high-pressure die-casting alloy, typical properties; Rheocast Company (aluminium die caster, Germantown WI) A380 alloy data page.
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 stronger than Aluminum A380?
Aluminum is stronger: its yield strength is 276 MPa against 160 MPa for Aluminum A380 (1.73x).
Which is lighter, Aluminum or Aluminum A380?
Aluminum is lighter: 2,700 kg/m³ against 2,713 kg/m³ for Aluminum A380.
Which is stiffer, Aluminum or Aluminum A380?
Aluminum A380 is stiffer: Young's modulus 71 GPa against 68.3 GPa for Aluminum, so the same part in Aluminum A380 deflects less under the same load.
Which is lighter for the same job, Aluminum or Aluminum A380?
For the same stiffness or strength: Aluminum is lighter for a strong rod or tie, strong beam, strong panel or plate; Aluminum A380 is lighter for a stiff rod or tie (tension), stiff beam (bending).
Part that must be
Aluminum
Aluminum A380
Stiff rod or tie (tension)
3% heavier
lighter
Stiff beam (bending)
1% heavier
lighter
Stiff panel or plate
about equal
about equal
Strong rod or tie
lighter
1.73x heavier
Strong beam
lighter
45% heavier
Strong panel or plate
lighter
32% 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 or Aluminum A380?
Aluminum conducts heat better: 167 W/m·K against 96.2 W/m·K for Aluminum A380.
Which expands less with temperature?
Aluminum A380 expands less: 21.8 µm/m·K against 23.6 µm/m·K for Aluminum.