DMLS AlSi10Mg Aluminum vs. SLA Resin Elastic 50A

Compare DMLS AlSi10Mg Aluminum vs. SLA Resin Elastic 50A strength, stiffness, weight and thermal properties.

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DMLS AlSi10Mg Aluminum3D printed metal (DMLS)

SLA Resin Elastic 50A3D printed (SLA resin)

Mechanical
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Yield strength	270MPasourcetypical, as manufactured, horizontal	not given (tensile used)
Ultimate tensile strength	450MPasourcetypical, as manufactured, horizontal	3.4MPasourcetypical
Elongation at break	10.2%sourcetypical at break, as manufactured, horizontal	160%sourcetypical
Young's modulus (stiffness)	72GPasourcesame material and process, different machine maker: Renishaw RenAM 500, 30 µm, as built, horizontal (XY)	not sourced
Density	2,670kg/m³sourcetypical part density (ISO 3369), EOS M 290, AlSi10Mg_030_FlexM291 (30 µm)	1,010kg/m³sourcetypical
Strength to weight	101kN·m/kg30x higher	3.37kN·m/kg
Stiffness to weight	27MN·m/kg	not sourced
Poisson's ratio	0.33sourcebase material: cast Al-Si-Mg alloy 359.0 (Al-9Si-0.6Mg, closest MIL-HDBK-5J alloy to AlSi10Mg / EN AC-43000)	not sourced
Shear modulus	27.1GPa	not sourced
Bulk modulus	70.6GPa	not sourced
Speed of sound	5,193m/s	not sourced
Thermal
Thermal conductivity	110W/m·Ksourcetypical, as manufactured, horizontal (ISO 22007-2)	not sourced
Thermal expansion	20µm/m·Ksourcemean 25-100 °C, ASTM E228	not sourced
100 mm part over a 50 °C swing	100µm growth	not sourced
Specific heat	963J/kg·Ksourcebase material: cast Al-Si-Mg alloy 359.0 (MIL-HDBK-5J), at 100 °C	not sourced
Heats up and cools (diffusivity)	42.8mm²/s	not sourced
Thermal shock resistance	13,819W/m	not sourced
Glass transition	not sourced	-34.5°CsourceDMA
Values for	EOS Aluminium AlSi10Mg (powder 9011-0024), EOS M 290 \| 30 µm process (AlSi10Mg_FlexM291 2.01), as manufactured, horizontal; machined (turned) specimens, ISO 6892-1 B10	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 AlSi10Mg Aluminum and SLA Resin Elastic 50A are 3D printed: their properties depend on build direction and print settings; these are typical values.

Questions

Is DMLS AlSi10Mg Aluminum stronger than SLA Resin Elastic 50A?

DMLS AlSi10Mg Aluminum is stronger: its yield strength is 270 MPa against tensile strength 3.4 MPa for SLA Resin Elastic 50A (79.4x).

Which is lighter, DMLS AlSi10Mg Aluminum or SLA Resin Elastic 50A?

SLA Resin Elastic 50A is lighter: 1,010 kg/m³ against 2,670 kg/m³ for DMLS AlSi10Mg Aluminum.

Which is lighter for the same job, DMLS AlSi10Mg Aluminum or SLA Resin Elastic 50A?

For the same stiffness or strength: DMLS AlSi10Mg Aluminum is lighter for a strong rod or tie, strong beam, strong panel or plate.

Part that must be	DMLS AlSi10Mg Aluminum	SLA Resin Elastic 50A
Strong rod or tie	lighter	30x heavier
Strong beam	lighter	6.99x heavier
Strong panel or plate	lighter	3.37x 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