Celanese Crastin® SK609 BK851 PBT-GF50

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Celanese Crastin® SK609 BK851 PBT-GF50
Categories:	Polymer; Thermoplastic; Polyester, TP; Polybutylene Terephthalate (PBT); Polybutylene Terephthalate (PBT), 50% Glass Fiber Filled
Material Notes:	50% Glass Reinforced Polybutylene Terephthalate Former DuPont product acquired by Celanese in 2022.
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Physical Properties	Metric	English	Comments

Density	1.71 g/cc	0.0618 lb/in³	ISO 1183

Mechanical Properties	Metric	English	Comments
Tensile Strength at Break	145 MPa	21000 psi	ISO 527-1/-2
Elongation at Break	1.7 %	1.7 %	ISO 527-1/-2
Tensile Modulus	15.7 GPa	2280 ksi	ISO 527-1/-2
Flexural Strength	210 MPa	30500 psi	ISO 178
Poissons Ratio	0.33	0.33
Izod Impact, Notched (ISO)	10.0 kJ/m² @Temperature 23.0 °C	4.76 ft-lb/in² @Temperature 73.4 °F	ISO 180/1A
Charpy Impact Unnotched	5.00 J/cm² @Temperature 23.0 °C	23.8 ft-lb/in² @Temperature 73.4 °F	ISO 179/1eU
Charpy Impact, Notched	1.10 J/cm² @Temperature 23.0 °C	5.23 ft-lb/in² @Temperature 73.4 °F	ISO 179/1eA

Electrical Properties	Metric	English	Comments
Comparative Tracking Index	400 V	400 V	IEC 60112

Thermal Properties	Metric	English	Comments
Melting Point	225 °C	437 °F	10°C/min; ISO 11357-1/-3
Deflection Temperature at 1.8 MPa (264 psi)	210 °C	410 °F	ISO 75-1/-2
Glass Transition Temp, Tg	55.0 °C	131 °F	10°C/min; ISO 11357-1/-2
Flammability, UL94	HB @Thickness 0.750 mm	HB @Thickness 0.0295 in	IEC 60695-11-10
	HB @Thickness 1.50 mm	HB @Thickness 0.0591 in	IEC 60695-11-10
Flame Spread	27.0 mm/min @Thickness 1.00 mm	1.06 in/min @Thickness 0.0394 in	ISO 3795 (FMVSS 302)

Processing Properties	Metric	English	Comments
Melt Temperature	260 °C	500 °F	Optimum, Injection
	250 - 270 °C	482 - 518 °F	Range, Injection
Mold Temperature	80.0 °C	176 °F	Optimum, Injection
	30.0 - 130 °C	86.0 - 266 °F	Injection
Ejection Temperature	170 °C	338 °F	Injection
Drying Temperature	120 °C	248 °F	Injection
Dry Time	2.00 - 4.00 hour	2.00 - 4.00 hour	Injection, Dehumidified Dryer
Moisture Content	<= 0.040 %	<= 0.040 %	Injection
Hold Pressure	>= 60.0 MPa	>= 8700 psi	Injection

Descriptive Properties
Back pressure	As low as possible
Drying Recommended	yes		Injection
FMVSS Class	B		ISO 3795 (FMVSS 302)
Fogging (mg)	0		G-value (condensate); ISO 6452
Odor Class	3		VDA 270
Polymer	PBT-GF50
Processing Hold Pressure Time (s/mm)	3		Injection

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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PDSX5061 / 197701

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