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Elmet Technologies

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 PropertiesMetricEnglishComments
Hardness, Shore A 7070°IRHD; ASTM D1415
 70 - 8570 - 85°IRHD, 0 to +10 change after 168 hours @ 125°C; ASTM D1415
Tensile Strength, Yield 9.35 MPa1360 psi-15% change after 168 hours @ 125°C; ASTM D412
 11.0 MPa1600 psiASTM D412
Elongation at Break 200 %200 %-20% change after 168 hours @ 125°C; ASTM D412
 250 %250 %ASTM D412
Compression Set 20 %
@Temperature 100 °C,
Time 86400 sec
20 %
@Temperature 212 °F,
Time 24.0 hour
ASTM D395
 
Thermal PropertiesMetricEnglishComments
Maximum Service Temperature, Air 160 °C320 °F
Minimum Service Temperature, Air -60.0 °C-76.0 °F
 -45.0 °C-49.0 °FNon-brittle after 3 minutes
Flash Point >= 200 °C>= 392 °F

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PPRECI056 / 57780

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