Technical datasheet

Crastin® S600F20 BK851

Supplied byCelanese- Last Updated on May 19, 2026

Crastin® S600F20 BK851 by Celanese is an unreinforced, lubricated, medium viscosity polybutylene terephthalate (PBT) resin. Possesses mechanical and physical properties such as stiffness & toughness, heat-, friction-, chemical-, heat ageing- & wear resistance, excellent surface finishes and good colorability. Exhibits good melt stability and excellent electrical insulation characteristics. Good melt stability enables the recycling of properly handled production waste. Can be processed using injection molding. Crastin® S600F20 BK851 by Celanese applications include electronics, electrical, automotive, mechanical engineering, chemical, domestic appliances and sporting goods industry.
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Crastin® S600F20 BK851 properties

Electrical properties

PropertiesValue & unitTest conditionTest method
Comparative Tracking Index (CTI)0.0 Visible After LoginVisible After LoginVisible After Login

Flammability properties

PropertiesValue & unitTest conditionTest method
Burning Behavior0.0 Visible After LoginVisible After LoginVisible After Login
Burning Rate0.0 Visible After LoginVisible After LoginVisible After Login
Glow Wire Flammability Index (GWFI)0.0 Visible After LoginVisible After LoginVisible After Login

Mechanical properties

PropertiesValue & unitTest conditionTest method
Elongation at Break0.0 Visible After LoginVisible After LoginVisible After Login
Elongation at Yield0.0 Visible After LoginVisible After LoginVisible After Login
Impact Strength, Notched Charpy0.0 Visible After LoginVisible After LoginVisible After Login
Impact Strength, Notched Izod0.0 Visible After LoginVisible After LoginVisible After Login
Modulus of Elasticity0.0 Visible After LoginVisible After LoginVisible After Login
Nominal Tensile Strain at Break0.0 Visible After LoginVisible After LoginVisible After Login

Other properties

PropertiesValue & unitTest conditionTest method
Tensile Strength at Yield0.0 Visible After LoginVisible After LoginVisible After Login

Physical properties

PropertiesValue & unitTest conditionTest method
Density0.0 Visible After LoginVisible After LoginVisible After Login
Linear Mold Shrinkage, Flow0.0 Visible After LoginVisible After LoginVisible After Login
Linear Mold Shrinkage, Transverse0.0 Visible After LoginVisible After LoginVisible After Login
Melt Mass-Flow Rate (MFR or MFI = Melt Flow Index or MI = Melt Index)0.0 Visible After LoginVisible After LoginVisible After Login

Thermal properties

PropertiesValue & unitTest conditionTest method
Heat Deflection Temperature (HDT), Annealed0.0 Visible After LoginVisible After LoginVisible After Login
Heat Deflection Temperature (HDT), Annealed0.0 Visible After LoginVisible After LoginVisible After Login
Heat Deflection Temperature (HDT), Unannealed0.0 Visible After LoginVisible After LoginVisible After Login
Melting Point0.0 Visible After LoginVisible After LoginVisible After Login
UL RTI, Electrical0.0 Visible After LoginVisible After LoginVisible After Login
UL RTI, Electrical0.0 Visible After LoginVisible After LoginVisible After Login
UL RTI, Mechanical with Impact0.0 Visible After LoginVisible After LoginVisible After Login
UL RTI, Mechanical with Impact0.0 Visible After LoginVisible After LoginVisible After Login
UL RTI, Mechanical without Impact0.0 Visible After LoginVisible After LoginVisible After Login
UL RTI, Mechanical without Impact0.0 Visible After LoginVisible After LoginVisible After Login

Crastin® S600F20 BK851 Processing Guidelines

Injection Molding Processing Guidelines

PropertiesValue & unitTest conditionTest method
Drying TemperatureVisible After LoginVisible After Login
Drying TimeVisible After LoginVisible After Login
Melt TemperatureVisible After LoginVisible After Login
Moisture Content (Max)Visible After LoginVisible After Login
Mold TemperatureVisible After LoginVisible After Login

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