Precision Polymer Engineering E65K Ethylene Propylene Rubber

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Precision Polymer Engineering E65K Ethylene Propylene Rubber
Categories:	Polymer; Thermoset; Rubber or Thermoset Elastomer (TSE)
Material Notes:	Peroxide cured, Ethylene Propylene Terpolymer (EPT), 50-70 °IRHD. Terpolymer of ethylene, propylene and diene monomers. Specially formulated for sealing sulphur hexafluoride (SF6) gas in electrical distribution equipment. Applications: Excellent resistance to silicone based oils and greases. Low compression set properties. Specifically designed for sealing SF6 gas in electrical distribution equipment, i.e. medium & high voltage switchgear.
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Mechanical Properties	Metric	English	Comments

Hardness, Shore A	65	65	°IRHD; ASTM D1415
	75	75	°IRHD, +10 change after 70 hours @ 100°C; ASTM D1415
Tensile Strength, Yield	8.50 MPa	1230 psi	-15% change after 70 hours @ 100°C; ASTM D412
	10.0 MPa	1450 psi	ASTM D412
Elongation at Break	110 %	110 %	-45% change after 70 hours @ 100°C; ASTM D412
	200 %	200 %	ASTM D412
Compression Set	25 % @Temperature 100 °C, Time 252000 sec	25 % @Temperature 212 °F, Time 70.0 hour	ASTM D395

Thermal Properties	Metric	English	Comments
Maximum Service Temperature, Air	150 °C	302 °F
Minimum Service Temperature, Air	-45.0 °C	-49.0 °F
	-40.0 °C	-40.0 °F	Non-brittle after 3 minutes
Flash Point	>= 200 °C	>= 392 °F

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