Thermal conductivity against densityHigher and further left: spreads more heat for its weightThermal expansion against thermal conductivityLower and further right: warps less when heated
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BASF Forward AM (BASF 3D Printing Solutions) Ultrafuse HiPS, TDS v2.2 (13.11.2019), printed specimens, XY 'Flat'. Specimen print settings are not stated; recommended processing on the sheet: nozzle 240-260 °C, bed 100-120 °C, 40-80 mm/s. Product is discontinued (Forward AM product page) but the TDS is still served by Forward AM.
Plastic PETG
Ultimaker PETG, 3D-printed specimens, XY (flat); Ultimaker S5 Pro, engineering intent profile, 0.15 mm layer height, AA 0.4 print core, 100% infill, Cura 4.9, printed one-at-a-time, conditioned >=24 h at room temperature. TDS v1.00, April 29, 2022.
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.
FDM HIPS and Plastic PETG are 3D printed: their properties depend on build direction and print settings; these are typical values.
Questions
Mechanical
Is FDM HIPS stronger than Plastic PETG?
Plastic PETG is stronger: its yield strength is 46.2 MPa against tensile strength 18.4 MPa for FDM HIPS (2.51x).
Which is lighter, FDM HIPS or Plastic PETG?
FDM HIPS is lighter: 1,023 kg/m³ against 1,270 kg/m³ for Plastic PETG.
Which is stiffer, FDM HIPS or Plastic PETG?
Plastic PETG is stiffer: Young's modulus 1.94 GPa against 1.59 GPa for FDM HIPS, so the same part in Plastic PETG deflects less under the same load.
Which is lighter for the same job, FDM HIPS or Plastic PETG?
For the same stiffness or strength: FDM HIPS is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate; Plastic PETG is lighter for a strong rod or tie, strong beam, strong panel or plate.
Part that must be
FDM HIPS
Plastic PETG
Stiff rod or tie (tension)
lighter
2% heavier
Stiff beam (bending)
lighter
12% heavier
Stiff panel or plate
lighter
16% heavier
Strong rod or tie
2.02x heavier
lighter
Strong beam
49% heavier
lighter
Strong panel or plate
28% heavier
lighter
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, FDM HIPS or Plastic PETG?
Plastic PETG stretches further before it breaks: 7.6% elongation at break against 1.4% for FDM HIPS.
Thermal
Which conducts heat better, FDM HIPS or Plastic PETG?
Plastic PETG conducts heat better: 0.21 W/m·K against 0.17 W/m·K for FDM HIPS.
Which expands less with temperature?
Plastic PETG expands less: 51 µm/m·K against 80 µm/m·K for FDM HIPS.