Sumitomo Bakelite RX® 525 Phenolic Novolac Molding Compound

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Sumitomo Bakelite RX® 525 Phenolic Novolac Molding Compound
Categories:	Polymer; Thermoset; Phenolic; Phenolic, Novolac, Cellulose Filled
Material Notes:	RX® 525 is a cellulose fiber reinforced phenolic novolac molding compound. This material is recommended for parts requiring moderate toughness. It is designed to meet the requirements of ASTM D-5948-96, Type CFG. (Replaces Military Specification MIL-M- 14H.) Information provided by Sumitomo Bakelite High Performance Plastics (sbhpp)
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Physical Properties	Metric	English	Comments

Specific Gravity	1.39 g/cc	1.39 g/cc	ASTM D792
Apparent Bulk Density	0.500 g/cc	0.0181 lb/in³	ASTM D1895
Water Absorption	0.30 % @Time 86400 sec	0.30 % @Time 24.0 hour	ASTM D570
	1.7 % @Time 173000 sec	1.7 % @Time 48.0 hour	ASTM D570
Linear Mold Shrinkage	0.0020 cm/cm	0.0020 in/in	ASTM D955

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell E	75	75	ASTM D785
Tensile Strength	41.0 MPa	5950 psi	ASTM D638
Flexural Strength	69.0 MPa	10000 psi	ASTM D790
Flexural Modulus	8.30 GPa	1200 ksi	ASTM D790
Compressive Strength	169 MPa	24500 psi	ASTM D695
Izod Impact, Notched	0.350 J/cm	0.656 ft-lb/in	ASTM D256A

Electrical Properties	Metric	English	Comments
Dielectric Strength	1.00 kV/mm @Frequency 60 Hz	25.4 kV/in @Frequency 60 Hz	SS, dry; ASTM D149
	2.00 kV/mm @Frequency 60 Hz	50.8 kV/in @Frequency 60 Hz	ST, dry; ASTM D149
Arc Resistance	70 sec	70 sec	ASTM D495

Thermal Properties	Metric	English	Comments
CTE, linear, Parallel to Flow	43.0 µm/m-°C	23.9 µin/in-°F	ASTM E831
CTE, linear, Transverse to Flow	52.0 µm/m-°C	28.9 µin/in-°F	ASTM E831
Thermal Conductivity	0.540 W/m-K	3.75 BTU-in/hr-ft²-°F	ASTM C518
Deflection Temperature at 1.8 MPa (264 psi)	165 °C	329 °F	As Molded; ASTM D648A
Flammability, UL94	HB @Thickness 1.60 mm	HB @Thickness 0.0630 in
	V-0 @Thickness 3.20 mm	V-0 @Thickness 0.126 in

Descriptive Properties
UL Temperature Index	150°C		UL 746B

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PSUMIT750 / 194555

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