Sumitomo Bakelite North America RX® 448 Cellulose Reinforced Phenolic Novolac

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Sumitomo Bakelite North America RX® 448 Cellulose Reinforced Phenolic Novolac
Categories:	Polymer; Thermoset; Filled/Reinforced Thermoset; Phenolic; Phenolic, Novolac, Cellulose Filled
Material Notes:	RX448 is a cellulose fiber reinforced phenolic novolac molding compound. This material is recommended for large parts requiring moderate toughness. It is designed to meet the requirements of ASTM D-5948-96, Type CFI-5. (Replaces Military Specification MIL-M-14H.) Information supplied by Sumitomo Bakelite North America.
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Physical Properties	Original Value	Comments

Bulk Density	0.400 g/cc	Powder; ASTM D1895
Density	1.43 g/cc	ASTM D-792
Water Absorption	0.60 %	24 hour; ASTM D570
	1.5 %	48 hour; ASTM D570
Linear Mold Shrinkage	0.0030 cm/cm	ASTM D955

Mechanical Properties	Original Value	Comments
Hardness, Rockwell E	70	ASTM D785
Tensile Strength, Ultimate	48.0 MPa	ASTM D638
Flexural Strength	70.0 MPa	ASTM D790
Flexural Modulus	10.0 GPa	ASTM D790
Compressive Strength	200 MPa	ASTM D695
Izod Impact, Notched	0.600 J/cm	ASTM D256A

Electrical Properties	Original Value	Comments
Dielectric Strength	3.40 kV/mm	60 Hz, wet, SS; ASTM D149
	5.90 kV/mm	ST; ASTM D149
Arc Resistance	65 sec	ASTM D495

Thermal Properties	Original Value	Comments
CTE, linear, Parallel to Flow	47.0 µm/m-°C @Temperature 20.0 °C	ASTM E831
CTE, linear, Transverse to Flow	53.0 µm/m-°C @Temperature 20.0 °C	ASTM E831
Thermal Conductivity	0.560 W/m-K	ASTM C518
Maximum Service Temperature, Air	150 °C	UL Temperature Index; UL 746B
Deflection Temperature at 1.8 MPa (264 psi)	180 °C	As Molded; ASTM D648A
Flammability, UL94	HB @Thickness 1.60 mm
	HB @Thickness 3.20 mm

Descriptive Properties
Available Molding Grades	Compression, Transfer, Injection
Color	Black
Form	Pellet

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