A380 aluminium high-pressure die-casting alloy, typical properties; Rheocast Company (aluminium die caster, Germantown WI) A380 alloy data page.
C36000 free-cutting brass, H02 half-hard rod 1 in. section (20% cold work), copper.org typical values
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 A380 stronger than Brass C360?
Brass C360 is stronger: its yield strength is 310 MPa against 160 MPa for Aluminum A380 (1.94x).
Which is lighter, Aluminum A380 or Brass C360?
Aluminum A380 is lighter: 2,713 kg/m³ against 8,498 kg/m³ for Brass C360.
Which is stiffer, Aluminum A380 or Brass C360?
Brass C360 is stiffer: Young's modulus 96.5 GPa against 71 GPa for Aluminum A380, so the same part in Brass C360 deflects less under the same load.
Which is lighter for the same job, Aluminum A380 or Brass C360?
For the same stiffness or strength: Aluminum A380 is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate.
Part that must be
Aluminum A380
Brass C360
Stiff rod or tie (tension)
lighter
2.3x heavier
Stiff beam (bending)
lighter
2.69x heavier
Stiff panel or plate
lighter
2.83x heavier
Strong rod or tie
lighter
1.62x heavier
Strong beam
lighter
2.02x heavier
Strong panel or plate
lighter
2.25x 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 A380 or Brass C360?
Brass C360 conducts heat better: 116 W/m·K against 96.2 W/m·K for Aluminum A380.
Which expands less with temperature?
Brass C360 expands less: 20.5 µm/m·K against 21.8 µm/m·K for Aluminum A380.