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Plastic Polypropylene vs. SLA Resin Elastic 50A

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

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Plastic PolypropyleneBulk polymer (molded or machined)
SLA Resin Elastic 50A3D printed (SLA resin)
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Mechanical
Yield strength33MPasourcetypical, tensile stress at yield ISO 527not given (tensile used)
Ultimate tensile strengthnot sourced3.4MPasourcetypical
Elongation at breaknot sourced160%sourcetypical
Young's modulus (stiffness)1.45GPasourcetypical, tensile modulus ISO 527not sourced
Density900kg/m³sourcetypical, 23 °C ISO 1183-11,010kg/m³sourcetypical
Strength to weight36.7kN·m/kg10.9x higher3.37kN·m/kg
Stiffness to weight1.61MN·m/kgnot sourced
Poisson's ratio0.42sourcebase material: polypropylene homopolymer family (INEOS Olefins & Polymers USA, Typical Engineering Properties of Polypropylene)not sourced
Shear modulus0.511GPanot sourced
Bulk modulus3.02GPanot sourced
Speed of sound1,269m/snot sourced
Thermal
Thermal conductivity0.17–0.22W/m·Ksourcebase material: polypropylene homopolymer family (INEOS Olefins & Polymers USA, Typical Engineering Properties of Polypropylene)not sourced
Thermal expansion80–100µm/m·Ksourcebase material: polypropylene homopolymer family (INEOS Olefins & Polymers USA, Typical Engineering Properties of Polypropylene)not sourced
100 mm part over a 50 °C swing450µm growthnot sourced
Specific heatnot sourcednot sourced
Heats up and cools (diffusivity)not sourcednot sourced
Thermal shock resistance28.6W/mnot sourced
Glass transitionnot sourced-34.5°CsourceDMA
Max service temperature90°CsourceHDT 0.45 MPa (ISO 75B), unannealednot sourced
Values forLyondellBasell Moplen HP501H polypropylene homopolymer (general purpose), typical ISO valuesFormlabs 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 Plastic Polypropylene stronger than SLA Resin Elastic 50A?

Plastic Polypropylene is stronger: its yield strength is 33 MPa against tensile strength 3.4 MPa for SLA Resin Elastic 50A (9.71x).

Which is lighter, Plastic Polypropylene or SLA Resin Elastic 50A?

Plastic Polypropylene is lighter: 900 kg/m³ against 1,010 kg/m³ for SLA Resin Elastic 50A.

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

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

Part that must bePlastic PolypropyleneSLA Resin Elastic 50A
Strong rod or tielighter10.9x heavier
Strong beamlighter5.11x heavier
Strong panel or platelighter3.5x 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

1k10k0.1110100Density (kg/m³)Young's modulus (GPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonAluminumSteelIronTitaniumSteel AISI 1018Stainless 304Stainless 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless 303Stainless 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 PMMAFDM ASAFDM PolycarbonateFDM PAHT-CFFDM HIPSSLA Resin Tough 2000SLS PA12 NylonDMLS AlSi10Mg AluminumDMLS Ti-6Al-4V ELI TitaniumDMLS 316L Stainless SteelDMLS 17-4PH Stainless SteelPlastic Polypropylene
Stiffness against density
1k10k101001kDensity (kg/m³)Yield strength (MPa)Plastic PLAPlastic PETGPlastic ABSPlastic TPUPlastic NylonRubberAluminumSteelIronTitaniumSteel AISI 1018Stainless 304Stainless 316Aluminum 6061-T6Aluminum 7075-T6Brass C360Copper C110GlassSteel AISI 1045Steel AISI 4340Steel A992Stainless 303Stainless 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 PMMAFDM ASAFDM PolycarbonateFDM PAHT-CFFDM HIPSSLA Resin Tough 2000SLS PA12 NylonDMLS AlSi10Mg AluminumDMLS Ti-6Al-4V ELI TitaniumDMLS 316L Stainless SteelDMLS 17-4PH Stainless SteelBrickPlastic PolypropyleneSLA Resin Elastic 50A
Strength against density

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