DMLS Ti-6Al-4V ELI Titanium vs. Magnesium AZ31B-H24

Compare DMLS Ti-6Al-4V ELI Titanium vs. Magnesium AZ31B-H24 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)	220MPasourcetypical, H24, 0.5-6 mm, 0.2 % proof stress
Ultimate tensile strength	1,270MPasourcetypical, as built, average of horizontal + vertical (M400)	290MPasourcetypical, H24, 0.5-6 mm
Elongation at break	8.7%sourcetypical at break, as built (M400)	13%sourcetypical, H24, 0.5-6 mm, gauge 5.65√A
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	44.8GPasourcetypical (handbook physical constant)
Density	4,400kg/m³sourcetypical part density (ISO 3369), M400	1,769kg/m³sourcenominal
Strength to weight	250kN·m/kg2.01x higher	124kN·m/kg
Stiffness to weight	25MN·m/kg	25.3MN·m/kg1% higher
Poisson's ratio	0.342sourcewrought TIMETAL 6-4 (TIMET measurement, mean of 10); composition-level, not DMLS-measured	0.35sourcetypical (handbook physical constant)
Shear modulus	41GPa2.47x stiffer in shear	16.6GPa
Bulk modulus	116GPa	49.8GPa
Speed of sound	5,000m/s	5,032m/s
Thermal
Thermal conductivity	6.6W/m·Ksourcebase material: wrought Ti-6Al-4V / 6-4 ELI (TIMET datasheet), 20 °C	76.9W/m·Ksourcetypical (temper/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)	26.8µm/m·Ksourcetypical (temperature range not stated)
100 mm part over a 50 °C swing	45µm growth2.98x less	134µm growth
Specific heat	580J/kg·Ksourcebase material: wrought Ti-6Al-4V / 6-4 ELI (TIMET datasheet), 20 °C	1,040J/kg·Ksourcetypical
Heats up and cools (diffusivity)	2.59mm²/s	41.8mm²/s16.2x faster
Thermal shock resistance	4,825W/m	9,159W/m1.9x more resistant
Melting point	1,630–1,650°Csourcemelting range, wrought TIMETAL 6-4 (composition-level)	not sourced
Max service temperature	not sourced	149°Csourcestated application limit
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	AZ31B-H24 sheet 0.016-0.062 in., MIL-HDBK-5J Table 4.2.1.0(b) (AMS 4377); strengths are S-basis MINIMUMS

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 Magnesium AZ31B-H24?

DMLS Ti-6Al-4V ELI Titanium is stronger: its yield strength is 1,100 MPa against 220 MPa for Magnesium AZ31B-H24 (5x).

Which is lighter, DMLS Ti-6Al-4V ELI Titanium or Magnesium AZ31B-H24?

Magnesium AZ31B-H24 is lighter: 1,769 kg/m³ against 4,400 kg/m³ for DMLS Ti-6Al-4V ELI Titanium.

Which is stiffer, DMLS Ti-6Al-4V ELI Titanium or Magnesium AZ31B-H24?

DMLS Ti-6Al-4V ELI Titanium is stiffer: Young's modulus 110 GPa against 44.8 GPa for Magnesium AZ31B-H24, 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 Magnesium AZ31B-H24?

For the same stiffness or strength: DMLS Ti-6Al-4V ELI Titanium is lighter for a strong rod or tie, strong beam; Magnesium AZ31B-H24 is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong panel or plate.

Part that must be	DMLS Ti-6Al-4V ELI Titanium	Magnesium AZ31B-H24
Stiff rod or tie (tension)	1% heavier	lighter
Stiff beam (bending)	1.59x heavier	lighter
Stiff panel or plate	1.84x heavier	lighter
Strong rod or tie	lighter	2.01x heavier
Strong beam	lighter	18% heavier
Strong panel or plate	11% 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 Magnesium AZ31B-H24?

Magnesium AZ31B-H24 conducts heat better: 76.9 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 26.8 µm/m·K for Magnesium AZ31B-H24.

Among 59 materials

Stiffness against density

Strength against density