Aluminum 1100-O vs. DMLS Ti-6Al-4V ELI Titanium

Compare Aluminum 1100-O vs. DMLS Ti-6Al-4V ELI Titanium strength, stiffness, weight and thermal properties.

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DMLS Ti-6Al-4V ELI Titanium3D printed metal (DMLS)

Mechanical
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Yield strength	35MPasourcetypical, O, 0.0625 in specimen	1,100MPasourcetypical, as built, average of horizontal + vertical (M400)
Ultimate tensile strength	90MPasourcetypical, O	1,270MPasourcetypical, as built, average of horizontal + vertical (M400)
Elongation at break	35%sourcetypical, O, in 4D	8.7%sourcetypical at break, as built (M400)
Young's modulus (stiffness)	69GPasourcetypical	110GPasourcesame maker and process, sibling grade: EOS Titanium Ti64 (Grade 5) on EOS M 290, as built, XY and Z, typical
Density	2,710kg/m³sourcenominal, 20 °C	4,400kg/m³sourcetypical part density (ISO 3369), M400
Strength to weight	12.9kN·m/kg	250kN·m/kg19.4x higher
Stiffness to weight	25.5MN·m/kg2% higher	25MN·m/kg
Poisson's ratio	not sourced	0.342sourcewrought TIMETAL 6-4 (TIMET measurement, mean of 10); composition-level, not DMLS-measured
Shear modulus	not sourced	41GPa
Bulk modulus	not sourced	116GPa
Speed of sound	5,046m/s	5,000m/s
Thermal
Thermal conductivity	222W/m·Ksourcetypical, O, 20 °C	6.6W/m·Ksourcebase material: wrought Ti-6Al-4V / 6-4 ELI (TIMET datasheet), 20 °C
Thermal expansion	23.6µm/m·Ksourcetypical, mean 20-100 °C	9µm/m·Ksourcemean 25-100 °C, ASTM E228; EOS Ti64 Grade 23 (=ELI) on EOS M 290 40 µm; condition not stated (sheet's mechanical data are heat treated)
100 mm part over a 50 °C swing	118µm growth	45µm growth2.62x less
Specific heat	901J/kg·Ksourcebase material: commercially pure aluminium EN AW-1050A (Hydro), 20 °C	580J/kg·Ksourcebase material: wrought Ti-6Al-4V / 6-4 ELI (TIMET datasheet), 20 °C
Heats up and cools (diffusivity)	90.9mm²/s35.2x faster	2.59mm²/s
Thermal shock resistance	not sourced	4,825W/m
Melting point	640–655°Csourcemelting range	1,630–1,650°Csourcemelting range, wrought TIMETAL 6-4 (composition-level)
Values for	1100-O (annealed) commercially pure aluminium, Kaiser Aluminum Tube & Pipe Alloy 1100 Technical Data (Rev. 05/06), typical properties; specific heat from Hydro EN AW-1050A (99.5% Al) extruded-products datasheet (10/2018).	EOS Titanium Ti64ELI (powder 9011-0040; ASTM F136/F3001, i.e. Grade 23) on EOS M400 SF, parameter set Ti64ELI_030_FlexM400_100, 30 µm, as built; ISO 6892-1 A14

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.

DMLS Ti-6Al-4V ELI Titanium is 3D printed: its properties depend on build direction and print settings; these are typical values.

Questions

Is Aluminum 1100-O stronger than DMLS Ti-6Al-4V ELI Titanium?

DMLS Ti-6Al-4V ELI Titanium is stronger: its yield strength is 1,100 MPa against 35 MPa for Aluminum 1100-O (31.4x).

Which is lighter, Aluminum 1100-O or DMLS Ti-6Al-4V ELI Titanium?

Aluminum 1100-O is lighter: 2,710 kg/m³ against 4,400 kg/m³ for DMLS Ti-6Al-4V ELI Titanium.

Which is stiffer, Aluminum 1100-O or DMLS Ti-6Al-4V ELI Titanium?

DMLS Ti-6Al-4V ELI Titanium is stiffer: Young's modulus 110 GPa against 69 GPa for Aluminum 1100-O, so the same part in DMLS Ti-6Al-4V ELI Titanium deflects less under the same load.

Which is lighter for the same job, Aluminum 1100-O or DMLS Ti-6Al-4V ELI Titanium?

For the same stiffness or strength: Aluminum 1100-O is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate; DMLS Ti-6Al-4V ELI Titanium is lighter for a strong rod or tie, strong beam, strong panel or plate.

Part that must be	Aluminum 1100-O	DMLS Ti-6Al-4V ELI Titanium
Stiff rod or tie (tension)	lighter	2% heavier
Stiff beam (bending)	lighter	29% heavier
Stiff panel or plate	lighter	39% heavier
Strong rod or tie	19.4x heavier	lighter
Strong beam	6.13x heavier	lighter
Strong panel or plate	3.45x 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, Aluminum 1100-O or DMLS Ti-6Al-4V ELI Titanium?

Aluminum 1100-O conducts heat better: 222 W/m·K against 6.6 W/m·K for DMLS Ti-6Al-4V ELI Titanium.

Which expands less with temperature?

DMLS Ti-6Al-4V ELI Titanium expands less: 9 µm/m·K against 23.6 µm/m·K for Aluminum 1100-O.

Among 72 materials

Stiffness against density

Strength against density