FKM
Fluoro rubber
FKM is a mixed polymerisate of hydrofluorocarbons. It is best known under the DuPont brand name "Viton®".
FKM compared to other elastomers is very expensive. As a result of its temperature resistance and resistance to mineral oils, fuels and acidic cleaning agents, however, it is used wherever NBR cannot be used due to excessive heat and chemical attacks.
| Abbreviation | FKM |
| Trade names | Viton® |
| Chemical name | Fluoro rubber |
| Mechanical properties | |
Hardness range [Shore hardness A/D] | 60 - 90 |
| Wear resistance | moderate |
| Tensile strength [Mpa] | 10 - 17 |
| Physical properties | |
| Density [g/cm³] | 2 |
| Application temperatures | |
| Short-term temperature range [°C] | -30 - 260 |
| Permanent temperature range [°C] | -20 - 230 |
| Other properties | |
| Flammability acc. to UL 94 | V-2 |
| Chemical resistance [++ very good // + good // o still good // - moderate // -- unsuitable] | |
| mineral grease, oil | ++ |
| petrol | ++ |
| acids, weak/strong | ++/++ |
| alkalis, weak/strong | +/- |
| perchloroethylene | + |
| trichloroethylene | + |
| acetone | -- |
| alcohols | - |
| brake fluid | -- |
| Hydrolysis resistance (hot water) | + |
| Atmospheric conditions/UV radiation | ++ |
Information for reference only; we do not assume any liability for its accuracy. The properties of thermoplastics are highly dependent on their specific composition and their additives.