Freudenberg Sealing Technologies 75 FKM 38269 Fluoroelastomer

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Freudenberg Sealing Technologies 75 FKM 38269 Fluoroelastomer
Categories:	Polymer; Thermoset; Fluoropolymer, TS; Thermoset Fluoroelastomer; Rubber or Thermoset Elastomer (TSE)
Material Notes:	FKM 38269 is the preferred choice for standard articles such as O-rings. FKM seals display very good resistance to media, ozone and aging. The material is also stable in fuels as well as petroleum-based oils and greases, along with aliphatic and aromatic hydrocarbons. It is unstable with regard to polar solvents (e.g. acetone, MEK and ethyl acetate), low molecular weight organic acids (formic and acetic acid), glycol-based brake fluid, ammonia gas, amines, alkalis and superheated steam. Information provided by Freudenberg Sealing Technologies.
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Physical Properties	Original Value	Comments

Density	2.08 - 2.14 g/cc @Temperature 23.0 °C	Required (not typical) value; ASTM D1817

Mechanical Properties	Original Value	Comments
Hardness, Shore A	70 - 80 @Temperature 23.0 °C	Required (not typical) value; DIN ISO 7619-1
Tensile Strength	23.7 MPa @Temperature 23.0 °C	DIN 53504, S2
Elongation at Break	240 % @Temperature 23.0 °C	DIN 53504, S2
Compression Set	19 % @Temperature 200 °C, Time 86400 sec	ASTM D395, B

Thermal Properties	Original Value	Comments
Maximum Service Temperature, Air	200 °C
Minimum Service Temperature, Air	-25.0 °C
	-15.0 °C	ASTM D1329, TR10

Descriptive Properties
Color	black
Cross-linking	peroxidic

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PFREU9146 / 293660

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