Thermal conductivity against densityHigher and further left: spreads more heat for its weightThermal expansion against thermal conductivityLower and further right: warps less when heated
Try it on a partA bracket to run stress or thermal on, free in your browser
Engineering Polymers Part and Mold Design: Thermoplastics, A Design GuideCovestroarchived copyPlastic ABS · Poisson's ratio: base material: ABS family typical (Covestro Part and Mold Design guide, Table 3-1)
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Terluran GP-22 (ABS) Product Data SheetINEOS StyrolutionPlastic ABS · Thermal conductivity: base material: INEOS Styrolution Terluran GP-22 injection-molding ABS, typicalPlastic ABS · Thermal expansion: base material: INEOS Styrolution Terluran GP-22 injection-molding ABS, range
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Eastar Copolyester 6763 Product Data SheetEastmanPlastic PETG · Thermal conductivity: base material: Eastman Eastar Copolyester 6763 (PETG), typicalPlastic PETG · Thermal expansion: base material: Eastman Eastar Copolyester 6763 (PETG), typicalPlastic PETG · Specific heat: base material: Eastman Eastar Copolyester 6763 (PETG), DSC at 60 °C (lowest temperature listed)
Each number points to the document that states it, with the exact basis. Values without a number are computed from the sourced ones. "Not sourced" means no citable source states it (or only a specification minimum); figures computed from it are left out too.
Plastic ABS and Plastic PETG are 3D printed: their properties depend on build direction and print settings; these are typical values.
Questions
Mechanical
Is Plastic ABS stronger than Plastic PETG?
Plastic PETG is stronger: its yield strength is 46.2 MPa against 38.1 MPa for Plastic ABS (21%).
Which is lighter, Plastic ABS or Plastic PETG?
Plastic ABS is lighter: 1,100 kg/m³ against 1,270 kg/m³ for Plastic PETG.
Which is stiffer, Plastic ABS or Plastic PETG?
Plastic ABS is stiffer: Young's modulus 1.96 GPa against 1.94 GPa for Plastic PETG, so the same part in Plastic ABS deflects less under the same load.
Which is lighter for the same job, Plastic ABS or Plastic PETG?
For the same stiffness or strength: Plastic ABS is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong beam, strong panel or plate; Plastic PETG is lighter for a strong rod or tie.
Part that must be
Plastic ABS
Plastic PETG
Stiff rod or tie (tension)
lighter
17% heavier
Stiff beam (bending)
lighter
16% heavier
Stiff panel or plate
lighter
16% heavier
Strong rod or tie
5% heavier
lighter
Strong beam
lighter
2% heavier
Strong panel or plate
lighter
5% 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).
Which is more ductile, Plastic ABS or Plastic PETG?
Plastic PETG stretches further before it breaks: 7.6% elongation at break against 4.6% for Plastic ABS.
Thermal
Which handles higher temperatures, Plastic ABS or Plastic PETG?
Plastic ABS does: 86.6 °C against 76.2 °C for Plastic PETG, both HDT 0.455 MPa (printed specimens).
Which conducts heat better, Plastic ABS or Plastic PETG?
Plastic PETG conducts heat better: 0.21 W/m·K against 0.17 W/m·K for Plastic ABS.
Which expands less with temperature?
Plastic PETG expands less: 51 µm/m·K against 95 µm/m·K for Plastic ABS.