Americas Styrenics STYRON® 678D High Heat Crystal Polystyrene

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Americas Styrenics STYRON® 678D High Heat Crystal Polystyrene
Categories:	Polymer; Thermoplastic; Polystyrene (PS); Polystyrene, Heat Resistant Grade
Material Notes:	Product Characteristics High heat resistance Excellent clarity Good moldability Food Contact Compliant Typical Applications Disposable cutlery Housewares Compact disc and DVD jewel boxes Desk organizers Information provided by AmericasStyrenics LLC.
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Physical Properties	Metric	English	Comments

Specific Gravity	1.04 g/cc	1.04 g/cc	ASTM D792
Linear Mold Shrinkage	0.0040 - 0.0080 cm/cm	0.0040 - 0.0080 in/in	ASTM D955
Melt Flow	10 g/10 min @Load 5.00 kg, Temperature 200 °C	10 g/10 min @Load 11.0 lb, Temperature 392 °F	ASTM D1238

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell L	107	107	ASTM D785
Tensile Strength at Break	37.2 MPa	5400 psi	ASTM D638
Tensile Strength	37.2 MPa	5400 psi	ASTM D638
Elongation at Break	3.0 %	3.0 %	ASTM D638
Tensile Modulus	3.10 GPa	450 ksi	ASTM D638
Flexural Strength	57.9 MPa	8400 psi	ASTM D790
Flexural Modulus	3.38 GPa	490 ksi	ASTM D790
Izod Impact, Notched	0.214 J/cm	0.400 ft-lb/in	ASTM D256

Thermal Properties	Metric	English	Comments
CTE, linear	90.0 µm/m-°C	50.0 µin/in-°F	ASTM D696
Deflection Temperature at 0.46 MPa (66 psi)	86.1 °C	187 °F	ASTM D648
Deflection Temperature at 1.8 MPa (264 psi)	80.0 °C	176 °F	ASTM D648
Vicat Softening Point	97.2 °C	207 °F	ASTM D1525

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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