Thermal conductivity against densityHigher and further left: spreads more heat for its weightThermal expansion against thermal conductivityLower and further right: warps less when heated
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Sources3 documents: Kaiser Aluminum, Nathan Trotter, Eastern Alloys
Aluminum 3003-O
3003-O (annealed) aluminium-manganese alloy, the heat-exchanger tube and brazing alloy, Kaiser Aluminum Tube & Pipe Alloy 3003 Technical Data (Rev. 05/06), typical properties; specific heat from the NIST cryogenic 3003-F fit at 293 K.
Zinc Zamak 3
Zamak 3 (ASTM B86 die cast), Nathan Trotter (zinc alloy producer) technical data sheet, typical values
1
Alloy 3003 Tube & Pipe Technical Data, Rev. 05/06Kaiser Aluminumarchived copyAluminum 3003-O · Yield strength: typical, O, 0.0625 in specimenAluminum 3003-O · Ultimate tensile strength: typical, OAluminum 3003-O · Elongation at break: typical, O, in 4DAluminum 3003-O · Young's modulus (stiffness): typicalAluminum 3003-O · Density: nominal, 20 °CAluminum 3003-O · Thermal conductivity: typical, O, 20 °CAluminum 3003-O · Thermal expansion: typical, mean 20-100 °CAluminum 3003-O · Melting point: melting range
Zinc Die Casting Properties Guide (2012)Eastern AlloysZinc Zamak 3 · Poisson's ratio: typical, Zamak 3 hot-chamber die cast
Each number points to the document that states it, with the exact basis. Values without a number are computed from the sourced ones. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.
Questions
Mechanical
Is Aluminum 3003-O stronger than Zinc Zamak 3?
Zinc Zamak 3 is stronger: its yield strength is 221 MPa against 40 MPa for Aluminum 3003-O (5.53x).
Which is lighter, Aluminum 3003-O or Zinc Zamak 3?
Aluminum 3003-O is lighter: 2,730 kg/m³ against 6,600 kg/m³ for Zinc Zamak 3.
Which is stiffer, Aluminum 3003-O or Zinc Zamak 3?
Zinc Zamak 3 is stiffer: Young's modulus 85.5 GPa against 69 GPa for Aluminum 3003-O, so the same part in Zinc Zamak 3 deflects less under the same load.
Which is lighter for the same job, Aluminum 3003-O or Zinc Zamak 3?
For the same stiffness or strength: Aluminum 3003-O is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong panel or plate; Zinc Zamak 3 is lighter for a strong rod or tie, strong beam.
Part that must be
Aluminum 3003-O
Zinc Zamak 3
Stiff rod or tie (tension)
lighter
1.95x heavier
Stiff beam (bending)
lighter
2.17x heavier
Stiff panel or plate
lighter
2.25x heavier
Strong rod or tie
2.29x heavier
lighter
Strong beam
29% heavier
lighter
Strong panel or plate
lighter
3% 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 is more ductile, Aluminum 3003-O or Zinc Zamak 3?
Aluminum 3003-O stretches further before it breaks: 30% elongation at break against 10% for Zinc Zamak 3.
Thermal
Which conducts heat better, Aluminum 3003-O or Zinc Zamak 3?
Aluminum 3003-O conducts heat better: 193 W/m·K against 113 W/m·K for Zinc Zamak 3.
Which expands less with temperature?
Aluminum 3003-O expands less: 23.2 µm/m·K against 27.4 µm/m·K for Zinc Zamak 3.