A. Schulman BMC 620X Mineral Filled, Glass Fiber Reinforced Polyester Compound

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A. Schulman BMC 620X Mineral Filled, Glass Fiber Reinforced Polyester Compound
Categories:	Polymer; Thermoset; Filled/Reinforced Thermoset; Polyester, TS; Thermoset Polyester Glass and Mineral Filled BMC
Material Notes:	BMC 620X molding compound is a mineral filled, glass fiber-reinforced polyester compound suitable for compression, transfer and stuffer injection molding. It is a high impact material produced in extruded form for ease of handling. Other characteristics are good moldability, excellent overall electrical properties and flame resistance. Typical applications include brush holders circuit breaker housings and welding gun handles.
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Physical Properties	Metric	English	Comments

Specific Gravity	1.79 g/cc	1.79 g/cc
Water Absorption	0.19 %	0.19 %	24 hours, 23°C
Linear Mold Shrinkage	0.0025 - 0.00345 cm/cm	0.0025 - 0.00345 in/in

Mechanical Properties	Metric	English	Comments
Hardness, Barcol	25 - 35	25 - 35
Tensile Strength, Ultimate	48.3 - 62.1 MPa	7000 - 9000 psi
Flexural Strength	131 - 159 MPa	19000 - 23000 psi
Compressive Strength	152 - 179 MPa	22000 - 26000 psi
Izod Impact, Notched	2.67 - 3.74 J/cm	5.00 - 7.00 ft-lb/in

Electrical Properties	Metric	English	Comments
Dielectric Constant	5.4 @Frequency 60 Hz	5.4 @Frequency 60 Hz
Dielectric Strength	14.8 kV/mm	375 kV/in	Short Time
Dissipation Factor	0.020 @Frequency 60 Hz	0.020 @Frequency 60 Hz
Arc Resistance	190 sec	190 sec
Comparative Tracking Index	>= 500 V	>= 500 V

Thermal Properties	Metric	English	Comments
Deflection Temperature at 1.8 MPa (264 psi)	>= 260 °C	>= 500 °F
Flammability, UL94	V-0 @Thickness 6.35 mm	V-0 @Thickness 0.250 in
	V-0 @Thickness 3.17 mm	V-0 @Thickness 0.125 in
	V-0 @Thickness 1.59 mm	V-0 @Thickness 0.0625 in

Processing Properties	Metric	English	Comments
Mold Temperature	138 - 166 °C	280 - 330 °F

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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PBMC024 / 27207

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