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Ensinger PEI

Sumitomo Bakelite RX® 680 Phenolic Molding Compound
Categories: Polymer; Thermoset; Phenolic; Phenolic/Glass Fiber SMC
Material Notes: RX® 680 is a fiberglass and glass bead filled phenolic molding compound, with good dimensional stability and good strength at elevated temperatures

Information provided by Sumitomo Bakelite High Performance Plastics (sbhpp)
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Physical PropertiesMetricEnglishComments
Specific Gravity 1.72 g/cc1.72 g/ccISO 1183
Apparent Bulk Density 0.700 g/cc0.0253 lb/in³ISO 60
Water Absorption 0.060 %0.060 %ISO 62
Linear Mold Shrinkage 0.0035 cm/cm0.0035 in/inISO 2577
 
Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell E 9595ISO 2039/2
Tensile Strength 75.0 MPa10900 psiISO 527
Flexural Strength 165 MPa23900 psiISO 178
Flexural Modulus 14.0 GPa2030 ksiISO 178
Compressive Strength 310 MPa45000 psiISO 604
 
Thermal PropertiesMetricEnglishComments
CTE, linear, Parallel to Flow 12.0 µm/m-°C6.67 µin/in-°FASTM E831
CTE, linear, Transverse to Flow 33.0 µm/m-°C18.3 µin/in-°FASTM E831
Deflection Temperature at 1.8 MPa (264 psi) 190 °C374 °FAs Molded; ISO 75A
 >= 282 °C>= 540 °FPost Baked; ISO 75A

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