Perfluoroelastomer (FFKM)
Description
Perfluoroelastomers show ultimate performance among all elastomers. They are resistant to nearly every chemical class with some grades offering heat resistance over 300°C, this makes FFKM the material of choice for high demanding sealing applications.
Application
Application advantages:
• Excellent heat resistance
• Resistant to almost every chemical class
• Excellent outgassing performance in vacuum environments.
• Wide temperature range -30° C to +300° C
Application limitations:
• Avoid low-molecular-weight, fully halogenated fluids and molten alkali metals.Strong oxidizing acids may causesome swelling
• Helium permeability is slightly higher than fluoroelastomer compounds
• Extreme high cost.
Usage:
• All areas where extreme critical application is required.
Physical properties | ASTM Method | FFKM-HS | FFKM-HS (I) | FFKM-CS | FFKM-PS | FKM-7512 | FKM-LT | FKM-AED | FKM-90 | HNBR 7513 | HNBR 9012 | HNBR-AED | HNBR-LT | FVMQ |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Colour | BLACK | BLACK | BLACK | WHITE | WHITE | BLACK | BLACK | BLACK | BLACK | BLACK | BLACK | BLACK | BLACK | BLUE |
Specific Gravity | - | 2.02 | 2 | 2 | 2 | 1.83 | 1.88 | - | BLACK | - | - | - | - | - |
Hardness Shore A | D2240 | 81 | 78 | 76 | 74 | 75 | 72 | 94 | 8.6 | 72 | 88 | - | 89 | 71 |
Elongation at Break % | D638 | 153 | 152 | 129 | 230 | 150 | 163 | 65 | 100 | 206 | 163 | 185 | 108 | 150 |
Tensile Strength Mpa | D638 | 17 | 11 | 16 | 11 | 12 | 15 | 17 | 11 | 13 | 10 | 20 | 13 | 7 |
Compression set 70 Hrs@ 200˚C | D395 | 14 | 14 | 15 | 18 | 20 | 20 | 16 | 25 | 22 | 22 | 18 | 20 | 14 |
Max. Service Temperature | - | 316 | 316 | 275 | 316 | 204 | 204 | 204 | 204 | 150 | 150 | 150 | 150 | 150 |
Min. Service Temperature ˚C | - | - | - | - | - | -19 | -40 | -26 | -19 | -32 | -32 | -35 | -46 | -72 |