JIS ADC12 (Al-Si-Cu, about A383 / EN AC-46100) high-pressure die-casting alloy, as cast; physical properties from Daiki Aluminium Industry (ADC12 ingot producer) measured values; modulus from S.S.Aluminum (ADC12 ingot producer) standard values.
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 ADC12 stronger than Brass C360?
Brass C360 is stronger: its yield strength is 310 MPa against 149 MPa for Aluminum ADC12 (2.08x).
Which is lighter, Aluminum ADC12 or Brass C360?
Aluminum ADC12 is lighter: 2,680 kg/m³ against 8,498 kg/m³ for Brass C360.
Which is stiffer, Aluminum ADC12 or Brass C360?
Brass C360 is stiffer: Young's modulus 96.5 GPa against 79.8 GPa for Aluminum ADC12, so the same part in Brass C360 deflects less under the same load.
Which is lighter for the same job, Aluminum ADC12 or Brass C360?
For the same stiffness or strength: Aluminum ADC12 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 ADC12
Brass C360
Stiff rod or tie (tension)
lighter
2.62x heavier
Stiff beam (bending)
lighter
2.88x heavier
Stiff panel or plate
lighter
2.98x heavier
Strong rod or tie
lighter
1.52x heavier
Strong beam
lighter
1.95x heavier
Strong panel or plate
lighter
2.2x 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 ADC12 or Brass C360?
Aluminum ADC12 conducts heat better: 125 W/m·K against 116 W/m·K for Brass C360.
Which expands less with temperature?
Brass C360 expands less: 20.5 µm/m·K against 21 µm/m·K for Aluminum ADC12.