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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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.
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
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TIMETAL 6-4 PropertiesTIMETarchived copyTitanium Ti-6Al-4V · Yield strength: typical, plate (>0.187 in), annealed, 0.2% offsetTitanium Ti-6Al-4V · Ultimate tensile strength: typical, plate, annealedTitanium Ti-6Al-4V · Elongation at break: typical, in 2 in., plate annealedTitanium Ti-6Al-4V · Density: nominalTitanium Ti-6Al-4V · Poisson's ratio: mean of TIMET measurementsTitanium Ti-6Al-4V · Melting point: melting rangeTitanium Ti-6Al-4V · Max service temperature: upper recommended use temperature
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TIMETAL 6-4 Data SheetTIMETarchived copyTitanium Ti-6Al-4V · Young's modulus (stiffness): typical range, 20 °CTitanium Ti-6Al-4V · Thermal conductivity: typical, 20 °C, mill annealedTitanium Ti-6Al-4V · Thermal expansion: typical, mean 0-100 °CTitanium Ti-6Al-4V · Specific heat: typical, 20 °C
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 Titanium Ti-6Al-4V?
Titanium Ti-6Al-4V is stronger: its yield strength is 885 MPa against 40 MPa for Aluminum 3003-O (22.1x).
Which is lighter, Aluminum 3003-O or Titanium Ti-6Al-4V?
Aluminum 3003-O is lighter: 2,730 kg/m³ against 4,430 kg/m³ for Titanium Ti-6Al-4V.
Which is stiffer, Aluminum 3003-O or Titanium Ti-6Al-4V?
Titanium Ti-6Al-4V is stiffer: Young's modulus 115 GPa against 69 GPa for Aluminum 3003-O, so the same part in Titanium Ti-6Al-4V deflects less under the same load.
Which is lighter for the same job, Aluminum 3003-O or Titanium Ti-6Al-4V?
For the same stiffness or strength: Aluminum 3003-O is lighter for a stiff beam (bending), stiff panel or plate; Titanium Ti-6Al-4V is lighter for a stiff rod or tie (tension), strong rod or tie, strong beam, strong panel or plate.
Part that must be
Aluminum 3003-O
Titanium Ti-6Al-4V
Stiff rod or tie (tension)
2% heavier
lighter
Stiff beam (bending)
lighter
26% heavier
Stiff panel or plate
lighter
37% heavier
Strong rod or tie
13.6x heavier
lighter
Strong beam
4.86x heavier
lighter
Strong panel or plate
2.9x 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 is more ductile, Aluminum 3003-O or Titanium Ti-6Al-4V?
Aluminum 3003-O stretches further before it breaks: 30% elongation at break against 16% for Titanium Ti-6Al-4V.
Thermal
Which conducts heat better, Aluminum 3003-O or Titanium Ti-6Al-4V?
Aluminum 3003-O conducts heat better: 193 W/m·K against 6.6 W/m·K for Titanium Ti-6Al-4V.
Which expands less with temperature?
Titanium Ti-6Al-4V expands less: 9 µm/m·K against 23.2 µm/m·K for Aluminum 3003-O.