DIFFERENCE BETWEEN FFPM AND FFKM O-RINGS :
COMPLETE GUIDE
Among high-performance materials, perfluoroelastomers (FFKM/FFPM) are distinguished by their
resistance to aggressive environments, from extreme temperatures to highly corrosive chemicals.
extreme temperatures or highly corrosive chemicals. But what are the
are the differences between FFKM and FFPM? This article sheds light on
their characteristics, standards and applications.
FFKM vs FFPM:
two names for the same material!
The terms FFKM and FFPM are often used interchangeably. In reality
both designate the same type of perfluoroelastomer. The distinction is based
classification standards adopted by different countries and industries:
FFKM (according to ASTM D 1418) :
American standard often used in the petrochemical
petrochemical and pharmaceutical industries.
ASTM International (American Standards of Technical Material) is an American
standardization body that allows the typology of different elastomers according to their type
their type: in our case, a perfluoroelastomer will be referred to as FFKM.
The ASTM standards also define control protocols for laboratories worldwide.
laboratories worldwide. These various tests are used to check the technical
technical characteristics such as hardness, elongation and tensile strength.
tensile strength. They can also be used to establish
aging tests.
FFPM (according to ISO/DIN 1629) :
Worldwide standard most commonly industrial applications in Europe.
The ISO (International Organization for standardization) standard establishes symbols
for elastomers, based on the chemical composition of their polymer chain.
chain: in this case, FFPM.
