Ultimaker ABS, 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 v5.00, April 20, 2022.
BASF Ultradur B 4300 G6 (PBT, 30% glass fibre), injection moulding grade; product information sheet 09/2026, typical values for uncoloured product 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.
Plastic ABS is 3D printed: its properties depend on build direction and print settings; these are typical values.
Questions
Is Plastic ABS stronger than Plastic PBT GF30?
Plastic PBT GF30 is stronger: its tensile strength is 140 MPa against yield strength 38.1 MPa for Plastic ABS (3.67x).
Which is lighter, Plastic ABS or Plastic PBT GF30?
Plastic ABS is lighter: 1,100 kg/m³ against 1,530 kg/m³ for Plastic PBT GF30.
Which is stiffer, Plastic ABS or Plastic PBT GF30?
Plastic PBT GF30 is stiffer: Young's modulus 9.8 GPa against 1.96 GPa for Plastic ABS, so the same part in Plastic PBT GF30 deflects less under the same load.
Which is lighter for the same job, Plastic ABS or Plastic PBT GF30?
For the same stiffness or strength: Plastic PBT GF30 is lighter for a stiff rod or tie (tension), stiff beam (bending), stiff panel or plate, strong rod or tie, strong beam, strong panel or plate.
Part that must be
Plastic ABS
Plastic PBT GF30
Stiff rod or tie (tension)
3.59x heavier
lighter
Stiff beam (bending)
1.61x heavier
lighter
Stiff panel or plate
23% heavier
lighter
Strong rod or tie
2.64x heavier
lighter
Strong beam
1.71x heavier
lighter
Strong panel or plate
38% 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 conducts heat better, Plastic ABS or Plastic PBT GF30?
Plastic PBT GF30 conducts heat better: 0.27 W/m·K against 0.17 W/m·K for Plastic ABS.
Which expands less with temperature?
Plastic PBT GF30 expands less: 25 µm/m·K against 95 µm/m·K for Plastic ABS.