DMLS Ti-6Al-4V ELI Titanium vs. Solder SAC305

Compare DMLS Ti-6Al-4V ELI Titanium vs. Solder SAC305 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	1,100MPasourcetypical, as built, average of horizontal + vertical (M400)	22MPasourcetypical
Ultimate tensile strength	1,270MPasourcetypical, as built, average of horizontal + vertical (M400)	39.6MPasourcetypical
Elongation at break	8.7%sourcetypical at break, as built (M400)	49%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	6.9GPasourcetypical, temperature and strain rate not stated
Density	4,400kg/m³sourcetypical part density (ISO 3369), M400	7,350kg/m³sourcetypical
Strength to weight	250kN·m/kg83.5x higher	2.99kN·m/kg
Stiffness to weight	25MN·m/kg26.6x higher	0.939MN·m/kg
Poisson's ratio	0.342sourcewrought TIMETAL 6-4 (TIMET measurement, mean of 10); composition-level, not DMLS-measured	0.35sourcetypical
Shear modulus	41GPa16x stiffer in shear	2.56GPa
Bulk modulus	116GPa	7.67GPa
Speed of sound	5,000m/s	969m/s
Thermal
Thermal conductivity	6.6W/m·Ksourcebase material: wrought Ti-6Al-4V / 6-4 ELI (TIMET datasheet), 20 °C	61W/m·Ksourcetypical, temperature not stated
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)	21.9µm/m·Ksourcemean, 20-100 °C (MacDermid Alpha)
100 mm part over a 50 °C swing	45µm growth2.43x less	110µm growth
Specific heat	580J/kg·Ksourcebase material: wrought Ti-6Al-4V / 6-4 ELI (TIMET datasheet), 20 °C	232J/kg·Ksourcetypical (MacDermid Alpha)
Heats up and cools (diffusivity)	2.59mm²/s	35.8mm²/s13.8x faster
Thermal shock resistance	4,825W/m	5,773W/m20% more resistant
Melting point	1,630–1,650°Csourcemelting range, wrought TIMETAL 6-4 (composition-level)	217–220°Csourcesolidus-liquidus
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	SAC305 (Sn96.5Ag3.0Cu0.5) solder alloy, bulk; Indium Corporation Indalloy 256 (SAC305) for Preforms product data sheet (Form No. 100346 R0, 2024), selected properties, test temperature not stated; expansion and specific heat from MacDermid Alpha VACULOY SAC TDS (06 September 2023).

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 DMLS Ti-6Al-4V ELI Titanium stronger than Solder SAC305?

DMLS Ti-6Al-4V ELI Titanium is stronger: its yield strength is 1,100 MPa against 22 MPa for Solder SAC305 (50x).

Which is lighter, DMLS Ti-6Al-4V ELI Titanium or Solder SAC305?

DMLS Ti-6Al-4V ELI Titanium is lighter: 4,400 kg/m³ against 7,350 kg/m³ for Solder SAC305.

Which is stiffer, DMLS Ti-6Al-4V ELI Titanium or Solder SAC305?

DMLS Ti-6Al-4V ELI Titanium is stiffer: Young's modulus 110 GPa against 6.9 GPa for Solder SAC305, so the same part in DMLS Ti-6Al-4V ELI Titanium deflects less under the same load.

Which is lighter for the same job, DMLS Ti-6Al-4V ELI Titanium or Solder SAC305?

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

Part that must be	DMLS Ti-6Al-4V ELI Titanium	Solder SAC305
Stiff rod or tie (tension)	lighter	26.6x heavier
Stiff beam (bending)	lighter	6.67x heavier
Stiff panel or plate	lighter	4.2x heavier
Strong rod or tie	lighter	83.5x heavier
Strong beam	lighter	22.7x heavier
Strong panel or plate	lighter	11.8x 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 conducts heat better, DMLS Ti-6Al-4V ELI Titanium or Solder SAC305?

Solder SAC305 conducts heat better: 61 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 21.9 µm/m·K for Solder SAC305.

Among 72 materials

Stiffness against density

Strength against density