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, Copper Development Association, Wieland
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.
Brass C360
C36000 free-cutting brass, H02 half-hard rod 1 in. section (20% cold work), copper.org 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
Wieland-Z30 (CuZn39Pb2, C37700) Data SheetWielandarchived copyBrass C360 · Poisson's ratio: base material: leaded free-machining brass CuZn39Pb2 (C37700), Wieland-Z30 rolled products, reference value at room temperature
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 Brass C360?
Brass C360 is stronger: its yield strength is 310 MPa against 40 MPa for Aluminum 3003-O (7.75x).
Which is lighter, Aluminum 3003-O or Brass C360?
Aluminum 3003-O is lighter: 2,730 kg/m³ against 8,498 kg/m³ for Brass C360.
Which is stiffer, Aluminum 3003-O or Brass C360?
Brass C360 is stiffer: Young's modulus 96.5 GPa against 69 GPa for Aluminum 3003-O, so the same part in Brass C360 deflects less under the same load.
Which is lighter for the same job, Aluminum 3003-O or Brass C360?
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; Brass C360 is lighter for a strong rod or tie, strong beam.
Part that must be
Aluminum 3003-O
Brass C360
Stiff rod or tie (tension)
lighter
2.23x heavier
Stiff beam (bending)
lighter
2.63x heavier
Stiff panel or plate
lighter
2.78x heavier
Strong rod or tie
2.49x heavier
lighter
Strong beam
26% heavier
lighter
Strong panel or plate
lighter
12% 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 Brass C360?
Aluminum 3003-O stretches further before it breaks: 30% elongation at break against 25% for Brass C360.
Thermal
Which conducts heat better, Aluminum 3003-O or Brass C360?
Aluminum 3003-O conducts heat better: 193 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 23.2 µm/m·K for Aluminum 3003-O.