C36000 free-cutting brass, H02 half-hard rod 1 in. section (20% cold work), copper.org typical values
Zamak 3 (ASTM B86 die cast), Nathan Trotter (zinc alloy producer) technical data sheet, 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 Brass C360 stronger than Zinc Zamak 3?
Brass C360 is stronger: its yield strength is 310 MPa against 221 MPa for Zinc Zamak 3 (40%).
Which is lighter, Brass C360 or Zinc Zamak 3?
Zinc Zamak 3 is lighter: 6,600 kg/m³ against 8,498 kg/m³ for Brass C360.
Which is stiffer, Brass C360 or Zinc Zamak 3?
Brass C360 is stiffer: Young's modulus 96.5 GPa against 85.5 GPa for Zinc Zamak 3, so the same part in Brass C360 deflects less under the same load.
Which is lighter for the same job, Brass C360 or Zinc Zamak 3?
For the same stiffness or strength: Brass C360 is lighter for a strong rod or tie; Zinc Zamak 3 is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong beam, strong panel or plate.
Part that must be
Brass C360
Zinc Zamak 3
Stiff rod or tie (tension)
14% heavier
lighter
Stiff beam (bending)
21% heavier
lighter
Stiff panel or plate
24% heavier
lighter
Strong rod or tie
lighter
9% heavier
Strong beam
3% heavier
lighter
Strong panel or plate
9% 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, Brass C360 or Zinc Zamak 3?
Brass C360 conducts heat better: 116 W/m·K against 113 W/m·K for Zinc Zamak 3.
Which expands less with temperature?
Brass C360 expands less: 20.5 µm/m·K against 27.4 µm/m·K for Zinc Zamak 3.