Evonik Vestodur® GK 30 30% Glass Bead Reinforced PBT

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Evonik Vestodur® GK 30 30% Glass Bead Reinforced PBT (discontinued **)
Categories:	Polymer; Thermoplastic; Polyester, TP; Polybutylene Terephthalate (PBT); Polybutylene Terephthalate (PBT), Glass Bead Filled
Material Notes:	Description: Degussa AG’s High Performance Polymers Business Unit manufactures a range of polybutylene terephthalate compounds that are supplied under the registered trademark VESTODUR® . Material properties characterizing VESTODUR compounds are: high thermostability high stiffness low water absorption resulting in high dimensional stability high hardness good strength good sliding friction behavior, low abrasion good creep behavior good electrical properties good chemical resistance good weathering resistance good processability no tendency to form stress cracks Specific Notes for this Material: Glass-bead filled and glass-fiber reinforced compounds with elevated or high rigidity, partially low-warpage; e.g., for housing parts in the automotive industry. Information provided by degussa. Evonik Industries is the successor company to Degussa.
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Physical Properties	Metric	English	Comments

Density	1.54 g/cc	0.0556 lb/in³	ISO 1183
Water Absorption at Saturation	0.45 %	0.45 %	ISO 62
Linear Mold Shrinkage	0.017 cm/cm	0.017 in/in	Pigmentation can change mold shrinkage.
Linear Mold Shrinkage, Transverse	0.017 cm/cm	0.017 in/in	Pigmentation can change mold shrinkage.
Melt Flow	23.1 g/10 min @Load 2.16 kg, Temperature 250 °C	23.1 g/10 min @Load 4.76 lb, Temperature 482 °F	ISO 1133

Mechanical Properties	Metric	English	Comments
Hardness, Shore D	82	82	ISO 868
Ball Indentation Hardness	200 MPa	29000 psi	H30; ISO 2039-1
Tensile Strength at Break	50.0 MPa	7250 psi	5 mm/min; ISO 527-1/2
Elongation at Break	2.0 %	2.0 %	5 mm/min; ISO 527-1/2
Tensile Modulus	4.00 GPa	580 ksi	ISO 527-1/2
Charpy Impact Unnotched	2.50 J/cm² @Temperature -30.0 °C	11.9 ft-lb/in² @Temperature -22.0 °F	ISO 179/1eU
	3.00 J/cm² @Temperature 23.0 °C	14.3 ft-lb/in² @Temperature 73.4 °F	ISO 179/1eU
Charpy Impact, Notched	0.250 J/cm² @Temperature -30.0 °C	1.19 ft-lb/in² @Temperature -22.0 °F	ISO 179/1eA
	0.250 J/cm² @Temperature 23.0 °C	1.19 ft-lb/in² @Temperature 73.4 °F	ISO 179/1eA

Electrical Properties	Metric	English	Comments
Volume Resistivity	1.00e+15 ohm-cm	1.00e+15 ohm-cm	IEC 60093
Surface Resistance	1.00e+13 ohm	1.00e+13 ohm	IEC 60093
Dielectric Constant	4.1 @Frequency 100 Hz	4.1 @Frequency 100 Hz	IEC 60250
Dielectric Strength	27.0 kV/mm	686 kV/in	K20/P50; IEC 60243-1
Dissipation Factor	0.016 @Frequency 100 Hz	0.016 @Frequency 100 Hz	IEC 60250
Comparative Tracking Index	250 V	250 V	Test Solution A, 100 drops; IEC 60112
	275 V	275 V	Test Solution A, CTI; IEC 60112

Thermal Properties	Metric	English	Comments
CTE, linear	100 µm/m-°C @Temperature 23.0 - 55.0 °C	55.6 µin/in-°F @Temperature 73.4 - 131 °F	Longitudinal; ISO 11359
CTE, linear, Transverse to Flow	100 µm/m-°C @Temperature 23.0 - 55.0 °C	55.6 µin/in-°F @Temperature 73.4 - 131 °F	ISO 11359
Melting Point	221 - 226 °C	430 - 439 °F	DSC
Deflection Temperature at 0.46 MPa (66 psi)	200 °C	392 °F	ISO 75-1/2
Deflection Temperature at 1.8 MPa (264 psi)	95.0 °C	203 °F	ISO 75-1/2
Vicat Softening Point	195 °C	383 °F	50N; ISO 306
Flammability, UL94	HB @Thickness 0.800 mm	HB @Thickness 0.0315 in
	HB @Thickness 1.60 mm	HB @Thickness 0.0630 in
Oxygen Index	23 %	23 %	ISO 4589
Glow Wire Test	750 °C @Thickness 2.00 mm	1380 °F @Thickness 0.0787 in	IEC 60695-2-1/0-3

Descriptive Properties
Electrolytic Corrosion	A1 Step		IEC 60426

**
Materials flagged as discontinued () are no longer part of the manufacturer’s standard product line according to our latest information. These materials may be available by special order, in distribution inventory, or reinstated as an active product. Data sheets from materials that are no longer available remain in MatWeb to assist users in finding replacement materials.

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