Thermal conductivity against densityHigher and further left: spreads more heat for its weightThermal expansion against thermal conductivityLower and further right: warps less when heated
Sources1 document: BASF
Values for
Bulk polymer (molded or machined). 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.
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Ultradur B 4300 G6 Product InformationBASFUltimate tensile strength: stress at break, 23 °CFlexural strength: typical, 23 °CElongation at break: strain at break, 23 °CYoung's modulus (stiffness): typical, 23 °CDensity: typicalThermal conductivity: typical (DIN 52612-1)Thermal expansion: longitudinal (flow), mean 23-55 °CSpecific heat: typical, 23 °CMelting point: DSC (ISO 11357)Max service temperature: HDT 1.8 MPa
Plastic PBT GF30 has a thermal conductivity of 0.27 W/m·K (0.156 BTU/hr·ft·°F). Basis: typical (DIN 52612-1). Source: BASF, Ultradur B 4300 G6 Product Information.
Specific heat of Plastic PBT GF30
The specific heat capacity of Plastic PBT GF30 is 1,050 J/kg·K (0.251 BTU/lb·°F). Basis: typical, 23 °C. Source: BASF, Ultradur B 4300 G6 Product Information.
Coefficient of thermal expansion of Plastic PBT GF30
Plastic PBT GF30 expands 25 µm/m·K (13.9 µin/in·°F): a 100 mm part grows 125 µm over a 50 °C rise. Basis: longitudinal (flow), mean 23-55 °C. Source: BASF, Ultradur B 4300 G6 Product Information.
Thermal diffusivity of Plastic PBT GF30
Computed from the conductivity, density and specific heat (k / ρc): 0.168 mm²/s, how fast a temperature change spreads through it.
Melting point of Plastic PBT GF30
Plastic PBT GF30 melts at 223 °C (433 °F). Basis: DSC (ISO 11357). Source: BASF, Ultradur B 4300 G6 Product Information.
Maximum service temperature of Plastic PBT GF30
The maximum service temperature of Plastic PBT GF30 is 205 °C (401 °F). Basis: HDT 1.8 MPa. Source: BASF, Ultradur B 4300 G6 Product Information.