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 Ultradur B 4300 G6 (PBT, 30% glass fibre), injection moulding grade; product information sheet 09/2026, typical values for uncoloured product at 23 °C.
Ultradur B 4300 G6 Product InformationBASFPlastic PBT GF30 · Ultimate tensile strength: stress at break, 23 °CPlastic PBT GF30 · Flexural strength: typical, 23 °CPlastic PBT GF30 · Elongation at break: strain at break, 23 °CPlastic PBT GF30 · Young's modulus (stiffness): typical, 23 °CPlastic PBT GF30 · Density: typicalPlastic PBT GF30 · Thermal conductivity: typical (DIN 52612-1)Plastic PBT GF30 · Thermal expansion: longitudinal (flow), mean 23-55 °CPlastic PBT GF30 · Specific heat: typical, 23 °CPlastic PBT GF30 · Melting point: DSC (ISO 11357)Plastic PBT GF30 · Max service temperature: HDT 1.8 MPa
3
Engineering Polymers Part and Mold Design: Thermoplastics, A Design GuideCovestroarchived copyPlastic ABS (bulk/injection) · Poisson's ratio: typical, ABS family (Covestro Part and Mold Design guide, Table 3-1)
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.
Questions
Mechanical
Is Plastic ABS (bulk/injection) stronger than Plastic PBT GF30?
Plastic PBT GF30 is stronger: its tensile strength is 140 MPa against yield strength 45 MPa for Plastic ABS (bulk/injection) (3.11x).
Which is lighter, Plastic ABS (bulk/injection) or Plastic PBT GF30?
Plastic ABS (bulk/injection) is lighter: 1,040 kg/m³ against 1,530 kg/m³ for Plastic PBT GF30.
Which is stiffer, Plastic ABS (bulk/injection) or Plastic PBT GF30?
Plastic PBT GF30 is stiffer: Young's modulus 9.8 GPa against 2.3 GPa for Plastic ABS (bulk/injection), so the same part in Plastic PBT GF30 deflects less under the same load.
Which is lighter for the same job, Plastic ABS (bulk/injection) 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 (bulk/injection)
Plastic PBT GF30
Stiff rod or tie (tension)
2.9x heavier
lighter
Stiff beam (bending)
40% heavier
lighter
Stiff panel or plate
10% heavier
lighter
Strong rod or tie
2.11x heavier
lighter
Strong beam
45% heavier
lighter
Strong panel or plate
20% 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, Plastic ABS (bulk/injection) or Plastic PBT GF30?
Plastic ABS (bulk/injection) stretches further before it breaks: 10% elongation at break against 3% for Plastic PBT GF30.
Thermal
Which handles higher temperatures, Plastic ABS (bulk/injection) or Plastic PBT GF30?
Plastic PBT GF30 does: 205 °C against 94 °C for Plastic ABS (bulk/injection).
Which conducts heat better, Plastic ABS (bulk/injection) or Plastic PBT GF30?
Plastic PBT GF30 conducts heat better: 0.27 W/m·K against 0.17 W/m·K for Plastic ABS (bulk/injection).
Which expands less with temperature?
Plastic PBT GF30 expands less: 25 µm/m·K against 95 µm/m·K for Plastic ABS (bulk/injection).