FFKM - Perfluoroelastomer
Clwyd reference FFKM ASTM classification FFKM Typical applications Semiconductor Chemical Petroleum ‘O’ Ring applications Advantages Exceptional chemical resistance in harsh conditions Thermal stability from -25°C to 320°C Ultimate in sealing performance Disadvantages Poor compression set Can be difficult to process Available hardness range (Shore A) 70- 95 Upper continuous service temp. 320°C Min. temp. for sealing applications -20°C Minimum non-brittle temp. -30°C Tensile strength (up to) 15 MPa Elongation at break (up to) 250% Price Bracket Very High ASTM 1 Oil Excellent ASTM 2 Oil Excellent ASTM 3 Oil Excellent Kerosene Excellent Liquid B Excellent Liquid 101 Excellent Phosphate ester Excellent Ketone Excellent Toluene Excellent Iso-octane Excellent Methanol Excellent Acid (weak) Excellent Acid (strong) Excellent Base (weak) Excellent Base (strong) Excellent Hydrogen sulphide Excellent Steam Excellent Ozone Excellent Radiation Excellent
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