Precision Polymer Engineering E70E Ethylene Propylene Rubber

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Precision Polymer Engineering E70E Ethylene Propylene Rubber
Categories:	Polymer; Thermoset; Rubber or Thermoset Elastomer (TSE)
Material Notes:	Ethylene Propylene Terpolymer, 66-75 °IRHD. Terpolymer of ethylene, propylene and diene monomers. To meet Aerospace Specification DTD5597A Grade 70. Applications: For sealing applications where good fluid resistance and low compression set are of prime importance. For continuous and/or intermittent use in contact with phosphate ester or silicone hydraulic fluids within the temperature ranges as quoted. Suitable for applications in contact with air, this material has excellent resistance to ozone. Unsuitable for use in contact with fuels, mineral oil based and diester oils and silicate fluids or greases derived from these.
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Mechanical Properties	Original Value	Comments

Hardness, Shore A	70	°IRHD; ASTM D1415
	70 - 85	°IRHD, 0 to +10 change after 168 hours @ 125°C; ASTM D1415
Tensile Strength, Yield	9.35 MPa	-15% change after 168 hours @ 125°C; ASTM D412
	11.0 MPa	ASTM D412
Elongation at Break	200 %	-20% change after 168 hours @ 125°C; ASTM D412
	250 %	ASTM D412
Compression Set	20 % @Temperature 100 °C, Time 86400 sec	ASTM D395

Thermal Properties	Original Value	Comments
Maximum Service Temperature, Air	160 °C
Minimum Service Temperature, Air	-60.0 °C
	-45.0 °C	Non-brittle after 3 minutes
Flash Point	>= 200 °C

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