DMLS Ti-6Al-4V ELI Titanium

DMLS Ti-6Al-4V ELI Titanium strength, stiffness, density and thermal properties, with their source.

A bracket in DMLS Ti-6Al-4V ELI Titanium, as-sintered finish.

Mechanical
Yield strength	1,100MPa1
Ultimate tensile strength	1,270MPa1
Elongation at break	8.7%1
Young's modulus (stiffness)	same maker and process110GPa2
Density	4,400kg/m³1
Strength to weight	250kN·m/kg
Stiffness to weight	25MN·m/kg
Poisson's ratio	wrought TIMETAL 6-40.3423
Shear modulus	41GPa
Bulk modulus	116GPa
Speed of sound	5,000m/s

Stiffness against densityHigher and further left: stiffer for its weight

Strength against densityHigher and further left: stronger for its weight

Thermal
Thermal conductivity	base material6.6W/m·K4
Thermal expansion	mean 25-100 °C9µm/m·K5
100 mm part over a 50 °C swing	45µm growth
Specific heat	base material580J/kg·K4
Heats up and cools (diffusivity)	2.59mm²/s
Thermal shock resistance	4,825W/m
Melting point	melting range1,630–1,650°C3

Thermal conductivity against densityHigher and further left: spreads more heat for its weight

Thermal expansion against thermal conductivityLower and further right: warps less when heated

Sources5 documents: EOS GmbH, TIMET

Values for: 3D printed metal (DMLS). 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

1
EOS Titanium Ti64ELI Material Data Sheet, M 290 and M 400EOS GmbHarchived copyYield strength: typical, as built, average of horizontal + vertical (M400)Ultimate tensile strength: typical, as built, average of horizontal + vertical (M400)Elongation at break: typical at break, as built (M400)Density: typical part density (ISO 3369), M400
2
EOS Titanium Ti64 Material Data Sheet, M 290 (2022)EOS GmbHarchived copyYoung's modulus (stiffness): same maker and process, sibling grade: EOS Titanium Ti64 (Grade 5) on EOS M 290, as built, XY and Z, typical
3
TIMETAL 6-4 PropertiesTIMETarchived copyPoisson's ratio: wrought TIMETAL 6-4 (TIMET measurement, mean of 10); composition-level, not DMLS-measuredMelting point: melting range, wrought TIMETAL 6-4 (composition-level)
4
TIMETAL 6-4 Data SheetTIMETarchived copyThermal conductivity: base material: wrought Ti-6Al-4V / 6-4 ELI (TIMET datasheet), 20 °CSpecific heat: base material: wrought Ti-6Al-4V / 6-4 ELI (TIMET datasheet), 20 °C
5
EOS Titanium Ti64 Grade 23 Material Data SheetEOS GmbHarchived copyThermal expansion: mean 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)

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

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Thermal properties of DMLS Ti-6Al-4V ELI Titanium

Thermal conductivity of DMLS Ti-6Al-4V ELI Titanium

DMLS Ti-6Al-4V ELI Titanium has a thermal conductivity of 6.6 W/m·K (3.81 BTU/hr·ft·°F). Basis: base material: wrought Ti-6Al-4V / 6-4 ELI (TIMET datasheet), 20 °C. Source: TIMET, TIMETAL 6-4 Data Sheetarchived copy.

Specific heat of DMLS Ti-6Al-4V ELI Titanium

The specific heat capacity of DMLS Ti-6Al-4V ELI Titanium is 580 J/kg·K (0.139 BTU/lb·°F). Basis: base material: wrought Ti-6Al-4V / 6-4 ELI (TIMET datasheet), 20 °C. Source: TIMET, TIMETAL 6-4 Data Sheetarchived copy.

Coefficient of thermal expansion of DMLS Ti-6Al-4V ELI Titanium

DMLS Ti-6Al-4V ELI Titanium expands 9 µm/m·K (5 µin/in·°F): a 100 mm part grows 45 µm over a 50 °C rise. Basis: mean 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). Source: EOS GmbH, EOS Titanium Ti64 Grade 23 Material Data Sheetarchived copy.

Thermal diffusivity of DMLS Ti-6Al-4V ELI Titanium

Computed from the conductivity, density and specific heat (k / ρc): 2.59 mm²/s, how fast a temperature change spreads through it.

Melting point of DMLS Ti-6Al-4V ELI Titanium

DMLS Ti-6Al-4V ELI Titanium melts at 1,630–1,650 °C (2,966–3,002 °F). Basis: melting range, wrought TIMETAL 6-4 (composition-level). Source: TIMET, TIMETAL 6-4 Propertiesarchived copy.