DMLS Ti-6Al-4V ELI Titanium vs. SLA Resin Elastic 50A

Compare DMLS Ti-6Al-4V ELI Titanium vs. SLA Resin Elastic 50A strength, stiffness, weight and thermal properties.

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

SLA Resin Elastic 50A3D printed (SLA resin)

Mechanical
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Yield strength	1,100MPasourcetypical, as built, average of horizontal + vertical (M400)	not given (tensile used)
Ultimate tensile strength	1,270MPasourcetypical, as built, average of horizontal + vertical (M400)	3.4MPasourcetypical
Elongation at break	8.7%sourcetypical at break, as built (M400)	160%sourcetypical
Young's modulus (stiffness)	110GPasourcesame maker and process, sibling grade: EOS Titanium Ti64 (Grade 5) on EOS M 290, as built, XY and Z, typical	not sourced
Density	4,400kg/m³sourcetypical part density (ISO 3369), M400	1,010kg/m³sourcetypical
Strength to weight	250kN·m/kg74.3x higher	3.37kN·m/kg
Stiffness to weight	25MN·m/kg	not sourced
Poisson's ratio	0.342sourcewrought TIMETAL 6-4 (TIMET measurement, mean of 10); composition-level, not DMLS-measured	not sourced
Shear modulus	41GPa	not sourced
Bulk modulus	116GPa	not sourced
Speed of sound	5,000m/s	not sourced
Thermal
Thermal conductivity	6.6W/m·Ksourcebase material: wrought Ti-6Al-4V / 6-4 ELI (TIMET datasheet), 20 °C	not sourced
Thermal expansion	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)	not sourced
100 mm part over a 50 °C swing	45µm growth	not sourced
Specific heat	580J/kg·Ksourcebase material: wrought Ti-6Al-4V / 6-4 ELI (TIMET datasheet), 20 °C	not sourced
Heats up and cools (diffusivity)	2.59mm²/s	not sourced
Thermal shock resistance	4,825W/m	not sourced
Melting point	1,630–1,650°Csourcemelting range, wrought TIMETAL 6-4 (composition-level)	not sourced
Glass transition	not sourced	-34.5°CsourceDMA
Values for	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	Formlabs Elastic 50A Resin V2 (FLELCL02), TDS Rev. 01 24.01.2024; parts printed on Form 3, 100 µm, Elastic 50A V2 settings and post-processing; tensile on Die C specimens cut from printed sheets after 3+ h at 23 °C.

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 and SLA Resin Elastic 50A are 3D printed: their properties depend on build direction and print settings; these are typical values.

Questions

Is DMLS Ti-6Al-4V ELI Titanium stronger than SLA Resin Elastic 50A?

DMLS Ti-6Al-4V ELI Titanium is stronger: its yield strength is 1,100 MPa against tensile strength 3.4 MPa for SLA Resin Elastic 50A (324x).

Which is lighter, DMLS Ti-6Al-4V ELI Titanium or SLA Resin Elastic 50A?

SLA Resin Elastic 50A is lighter: 1,010 kg/m³ against 4,400 kg/m³ for DMLS Ti-6Al-4V ELI Titanium.

Which is lighter for the same job, DMLS Ti-6Al-4V ELI Titanium or SLA Resin Elastic 50A?

For the same stiffness or strength: DMLS Ti-6Al-4V ELI Titanium is lighter for a strong rod or tie, strong beam, strong panel or plate.

Part that must be	DMLS Ti-6Al-4V ELI Titanium	SLA Resin Elastic 50A
Strong rod or tie	lighter	74.3x heavier
Strong beam	lighter	10.8x heavier
Strong panel or plate	lighter	4.13x 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).

Among 59 materials

Stiffness against density

Strength against density