DMLS 316L Stainless Steel vs. SLA Resin Elastic 50A

Compare DMLS 316L Stainless Steel vs. SLA Resin Elastic 50A strength, stiffness, weight and thermal properties.

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DMLS 316L Stainless Steel3D printed metal (DMLS)

SLA Resin Elastic 50A3D printed (SLA resin)

Mechanical
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Yield strength	530MPasourcetypical, as manufactured, horizontal	not given (tensile used)
Ultimate tensile strength	640MPasourcetypical, as manufactured, horizontal	3.4MPasourcetypical
Elongation at break	40%sourcetypical at break, as manufactured, horizontal	160%sourcetypical
Young's modulus (stiffness)	185GPasourcetypical, as built, horizontal (XY); EOSINT M280-400W / M290-400W, 316L_Surface 1.0, 20 µm (2014 sheet)	not sourced
Density	7,900kg/m³sourcepart density (ISO 3369, not labelled min or typical), EOS M 290, 40 µm FlexLine	1,010kg/m³sourcetypical
Strength to weight	67.1kN·m/kg19.9x higher	3.37kN·m/kg
Stiffness to weight	23.4MN·m/kg	not sourced
Poisson's ratio	0.3sourcebase material: austenitic stainless steels incl. 1.4404 (316L), design value	not sourced
Shear modulus	71.2GPa	not sourced
Bulk modulus	154GPa	not sourced
Speed of sound	4,839m/s	not sourced
Thermal
Thermal conductivity	16.2W/m·Ksourcebase material: wrought 316/316L (Cleveland-Cliffs), at 100 °C	not sourced
Thermal expansion	15.7µm/m·Ksourcemean 25-100 °C, ASTM E228	not sourced
100 mm part over a 50 °C swing	78.6µm growth	not sourced
Specific heat	500J/kg·Ksourcebase material: wrought 316/316L (Cleveland-Cliffs), 0-100 °C	not sourced
Heats up and cools (diffusivity)	4.1mm²/s	not sourced
Thermal shock resistance	2,067W/m	not sourced
Glass transition	not sourced	-34.5°CsourceDMA
Values for	EOS StainlessSteel 316L (powder 9011-0032), EOS M 290, ParameterSet 316L 20µm Surface M290/400W, as manufactured, horizontal; ISO 6892-1	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 316L Stainless Steel and SLA Resin Elastic 50A are 3D printed: their properties depend on build direction and print settings; these are typical values.

Questions

Is DMLS 316L Stainless Steel stronger than SLA Resin Elastic 50A?

DMLS 316L Stainless Steel is stronger: its yield strength is 530 MPa against tensile strength 3.4 MPa for SLA Resin Elastic 50A (156x).

Which is lighter, DMLS 316L Stainless Steel or SLA Resin Elastic 50A?

SLA Resin Elastic 50A is lighter: 1,010 kg/m³ against 7,900 kg/m³ for DMLS 316L Stainless Steel.

Which is lighter for the same job, DMLS 316L Stainless Steel or SLA Resin Elastic 50A?

For the same stiffness or strength: DMLS 316L Stainless Steel is lighter for a strong rod or tie, strong beam, strong panel or plate.

Part that must be	DMLS 316L Stainless Steel	SLA Resin Elastic 50A
Strong rod or tie	lighter	19.9x heavier
Strong beam	lighter	3.7x heavier
Strong panel or plate	lighter	1.6x 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