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Polymer Types - FKM 1 - Fluoroelastomer copolymer...

Clwyd reference FKM1
ASTM classification FKM type 1

Type 1 FKM are fluorocarbon copolymers based on vinylidene fluoride and hexapropylene  fluoride.

Typical applications General purpose seals for aerospace fuel and automotive applications (N.B. limited resistance to biofuels)
Advantages

Excellent high temperature resistance
Good resistance to oils and most non-polar solvents
Excellent ozone and weathering resistance

Disadvantages

Limited steam resistance
Poor resistance to methanol
Poor low temperature performance

 
Available hardness range (Shore A) 50 - 95
Upper continuous service temp. (°C) 240
Min. temp. for sealing applications (°C) -15
Minimum non-brittle  temp.  (°C) -20
Tensile strength (up to) 20 MPa
Elongation at break (up to) 300%

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