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	Original Value	Comments

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

Mechanical Properties	Original Value	Comments
Hardness, Rockwell E	75	ASTM D785
Tensile Strength	41.0 MPa	ASTM D638
Flexural Strength	69.0 MPa	ASTM D790
Flexural Modulus	8.30 GPa	ASTM D790
Compressive Strength	169 MPa	ASTM D695
Izod Impact, Notched	35.0 J/m	ASTM D256A

Electrical Properties	Original Value	Comments
Dielectric Strength	1.00 kV/mm @Frequency 60 Hz	SS, dry; ASTM D149
	2.00 kV/mm @Frequency 60 Hz	ST, dry; ASTM D149
Arc Resistance	70 sec	ASTM D495

Thermal Properties	Original Value	Comments
CTE, linear, Parallel to Flow	43.0 µm/m-°C	ASTM E831
CTE, linear, Transverse to Flow	52.0 µm/m-°C	ASTM E831
Thermal Conductivity	0.540 W/m-K	ASTM C518
Maximum Service Temperature, Air	150 °C	UL 746B Temperature Index
Deflection Temperature at 1.8 MPa (264 psi)	165 °C	As Molded; ASTM D648A
Flammability, UL94	HB @Thickness 1.60 mm
	V-0 @Thickness 3.20 mm

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PSUMIT750 / 194555

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