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Silicon vs. SLA Resin Elastic 50A

Compare Silicon vs. SLA Resin Elastic 50A strength, stiffness, weight and thermal properties.

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SiliconGrown single crystal
SLA Resin Elastic 50A3D printed (SLA resin)
Try it on a partA sample part to run stress or thermal on, free in your browserOpen in LessCADOpen in LessCAD
Mechanical
Yield strengthnot given (tensile used)not given (tensile used)
Ultimate tensile strength130MPasourcemodulus of rupture (bending fracture stress); brittle, no yield point3.4MPasourcetypical
Flexural strength130MPasourcemodulus of rupturenot sourced
Elongation at breaknot sourced160%sourcetypical
Young's modulus (stiffness)131GPasourcetypical (single quoted value of an anisotropic crystal)not sourced
Density2,329kg/m³sourcetypical1,010kg/m³sourcetypical2.31x lighter
Strength to weight55.8kN·m/kg16.6x higher3.37kN·m/kg
Stiffness to weight56.2MN·m/kgnot sourced
Poisson's ratio0.221sourcetypicalnot sourced
Shear modulus53.6GPanot sourced
Bulk modulus78.3GPanot sourced
Speed of sound7,500m/snot sourced
Thermal
Thermal conductivity163W/m·Ksourcetypical at 313 K (40 °C)not sourced
Thermal expansion2.62µm/m·Ksourcetypical at 300 Knot sourced
100 mm part over a 50 °C swing13.1µm growthnot sourced
Specific heat732J/kg·Ksourcetypicalnot sourced
Heats up and cools (diffusivity)95.6mm²/snot sourced
Thermal shock resistance48,095W/mnot sourced
Melting point1,412°Csourcetypicalnot sourced
Glass transitionnot sourced-34.5°CsourceDMA
Max service temperature300°Csourceproducer's maximum application temperature (optical components)not sourced
Values forSynthetic single-crystal silicon (cubic, diamond structure), Korth Kristalle (crystal grower) material data; Korth usually supplies Floating Zone (FZ) material, Czochralski (Cz) also offered. Silicon is elastically anisotropic; the producer quotes one modulus and the solver is isotropic.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.

SLA Resin Elastic 50A is 3D printed: its properties depend on build direction and print settings; these are typical values.

Questions

Is Silicon stronger than SLA Resin Elastic 50A?

Silicon is stronger: its tensile strength is 130 MPa against 3.4 MPa for SLA Resin Elastic 50A (38.2x).

Which is lighter, Silicon or SLA Resin Elastic 50A?

SLA Resin Elastic 50A is lighter: 1,010 kg/m³ against 2,329 kg/m³ for Silicon.

Which is lighter for the same job, Silicon or SLA Resin Elastic 50A?

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

Part that must beSiliconSLA Resin Elastic 50A
Strong rod or tielighter16.6x heavier
Strong beamlighter4.92x heavier
Strong panel or platelighter2.68x 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 72 materials

1k10k0.1110100Density (kg/m³)Young's modulus (GPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonAluminumSteelIronTitaniumSteel AISI 1018Stainless Steel 304Stainless Steel 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless Steel 303Stainless Steel 17-4PHAluminum 2024-T351Aluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VBrass C260Nickel Inconel 718Magnesium AZ31B-H24Zinc Zamak 3Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic POM/AcetalPlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic UHMWPEPlastic HDPEPlastic PolypropylenePlastic PMMAFDM ASAFDM PolycarbonateFDM PAHT-CFFDM HIPSSLA Resin Tough 2000SLS PA12 NylonDMLS AlSi10Mg AluminumDMLS Ti-6Al-4V ELI TitaniumDMLS 316L Stainless SteelDMLS 17-4PH Stainless SteelPCB Laminate FR-4Ceramic Alumina 96%Ceramic Aluminum NitrideAluminum A380Aluminum 6063-T6Aluminum 1100-OAluminum ADC12Magnesium AZ91DSolder SAC305Plastic PBT GF30Plastic PPS GF40Plastic LCP GF30Silicon
Stiffness against density
1k10k101001kDensity (kg/m³)Yield strength (MPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonRubberAluminumSteelIronTitaniumSteel AISI 1018Stainless Steel 304Stainless Steel 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless Steel 303Stainless Steel 17-4PHAluminum 2024-T351Aluminum 5052-H32Aluminum 7050-T7451Titanium Ti-6Al-4VBrass C260Nickel Inconel 718Magnesium AZ31B-H24Zinc Zamak 3Plastic ABS (bulk/injection)Plastic PolycarbonatePlastic POM/AcetalPlastic Nylon PA6Plastic Nylon PA66Plastic PEEKPlastic PTFEPlastic UHMWPEPlastic HDPEPlastic PolypropylenePlastic PMMAFDM ASAFDM PolycarbonateFDM PAHT-CFFDM HIPSSLA Resin Tough 2000SLS PA12 NylonDMLS AlSi10Mg AluminumDMLS Ti-6Al-4V ELI TitaniumDMLS 316L Stainless SteelDMLS 17-4PH Stainless SteelBrickPCB Laminate FR-4Ceramic Alumina 96%Aluminum A380Aluminum 6063-T6Aluminum 1100-OAluminum ADC12Magnesium AZ91DSolder SAC305Plastic PBT GF30Plastic PPS GF40Plastic LCP GF30SiliconSLA Resin Elastic 50A
Strength against density

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