Fluorocarbon Rubber (FKM, FPM)
FKM rubber is a thermoset elastomer or rubber material. It has a fairly high density among rubber materials. In addition, it has a fairly low tensile strength and a moderately low ductility. The graph bars on the material properties cards below compare FKM rubber to other rubber materials (top) and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Elongation at Break
300 %
Tensile Strength: Ultimate (UTS)
7.5 MPa 1.1 x 103 psi
Thermal Properties
Glass Transition Temperature
-20 °C -4.0 °F
Maximum Temperature: Mechanical
220 °C 420 °F
Otherwise Unclassified Properties
Density
1.8 g/cm3 110 lb/ft3
Limiting Oxygen Index (LOI)
51 %
Common Calculations
Strength to Weight: Axial
1.1 points
Strength to Weight: Bending
4.7 points
Followup Questions
Further Reading
Rubber Formulary, The, Peter A. Ciullo and Norman Hewitt, 1999