FKM 4 - Fluoroelastomer terpolymer of tetrafluoroethylene, propylene & vinylidene fluoride

Clwyd reference FKM 4
ASTM classification FKM 4
Typical applications
Advantages
Disadvantages
Available hardness range (Shore A) 60 - 95
Upper continuous service temp. 250°C
Min. temp. for sealing applications -5°C
Minimum non-brittle  temp.  -10°C
Tensile strength (up to) 20 MPa
Elongation at break (up to) 250%
Price Bracket Medium
ASTM 1 Oil Excellent
ASTM 2 Oil Excellent
ASTM 3 Oil Excellent
Kerosene Excellent
Liquid B Excellent
Liquid 101 Excellent
Phosphate ester None
Ketone None
Toluene Excellent
Iso-octane Excellent
Methanol Excellent
Acid (weak) Excellent
Acid (strong) Excellent
Base (weak) None
Base (strong) None
Hydrogen sulphide None
Steam None
Ozone Excellent
Radiation Excellent
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