DMLS Ti-6Al-4V ELI Titanium vs. Plastic PBT GF30

Compare DMLS Ti-6Al-4V ELI Titanium vs. Plastic PBT GF30 strength, stiffness, weight and thermal properties.

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

Plastic PBT GF30Bulk polymer (molded or machined)

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)	140MPasourcestress at break, 23 °C
Flexural strength	not sourced	210MPasourcetypical, 23 °C
Elongation at break	8.7%sourcetypical at break, as built (M400)	3%sourcestrain at break, 23 °C
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	9.8GPasourcetypical, 23 °C
Density	4,400kg/m³sourcetypical part density (ISO 3369), M400	1,530kg/m³sourcetypical
Strength to weight	250kN·m/kg2.73x higher	91.5kN·m/kg
Stiffness to weight	25MN·m/kg3.9x higher	6.41MN·m/kg
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	2,531m/s
Thermal
Thermal conductivity	6.6W/m·Ksourcebase material: wrought Ti-6Al-4V / 6-4 ELI (TIMET datasheet), 20 °C	0.27W/m·Ksourcetypical (DIN 52612-1)
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)	25µm/m·Ksourcelongitudinal (flow), mean 23-55 °C
100 mm part over a 50 °C swing	45µm growth2.78x less	125µm growth
Specific heat	580J/kg·Ksourcebase material: wrought Ti-6Al-4V / 6-4 ELI (TIMET datasheet), 20 °C	1,050J/kg·Ksourcetypical, 23 °C
Heats up and cools (diffusivity)	2.59mm²/s15.4x faster	0.168mm²/s
Thermal shock resistance	4,825W/m	not sourced
Melting point	1,630–1,650°Csourcemelting range, wrought TIMETAL 6-4 (composition-level)	223°CsourceDSC (ISO 11357)
Max service temperature	not sourced	205°CsourceHDT 1.8 MPa
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	BASF Ultradur B 4300 G6 (PBT, 30% glass fibre), injection moulding grade; product information sheet 09/2026, typical values for uncoloured product 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 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 Plastic PBT GF30?

DMLS Ti-6Al-4V ELI Titanium is stronger: its yield strength is 1,100 MPa against tensile strength 140 MPa for Plastic PBT GF30 (7.86x).

Which is lighter, DMLS Ti-6Al-4V ELI Titanium or Plastic PBT GF30?

Plastic PBT GF30 is lighter: 1,530 kg/m³ against 4,400 kg/m³ for DMLS Ti-6Al-4V ELI Titanium.

Which is stiffer, DMLS Ti-6Al-4V ELI Titanium or Plastic PBT GF30?

DMLS Ti-6Al-4V ELI Titanium is stiffer: Young's modulus 110 GPa against 9.8 GPa for Plastic PBT GF30, 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 Plastic PBT GF30?

For the same stiffness or strength: DMLS Ti-6Al-4V ELI Titanium is lighter for a stiff rod or tie (tension), stiff beam (bending), strong rod or tie, strong beam; Plastic PBT GF30 is lighter for a stiff panel or plate, strong panel or plate.

Part that must be	DMLS Ti-6Al-4V ELI Titanium	Plastic PBT GF30
Stiff rod or tie (tension)	lighter	3.9x heavier
Stiff beam (bending)	lighter	16% heavier
Stiff panel or plate	28% heavier	lighter
Strong rod or tie	lighter	2.73x heavier
Strong beam	lighter	37% heavier
Strong panel or plate	3% 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, DMLS Ti-6Al-4V ELI Titanium or Plastic PBT GF30?

DMLS Ti-6Al-4V ELI Titanium conducts heat better: 6.6 W/m·K against 0.27 W/m·K for Plastic PBT GF30.

Which expands less with temperature?

DMLS Ti-6Al-4V ELI Titanium expands less: 9 µm/m·K against 25 µm/m·K for Plastic PBT GF30.

Among 72 materials

Stiffness against density

Strength against density