Fluoroelastomer
Fluoroelastomer, commonly known as FKM, is a high-performance synthetic rubber material with exceptional resistance to heat, chemicals, and oils. Widely used in aerospace, automotive, and industrial applications, Fluoroelastomer offers superior durability in extreme environments where other elastomers fail.
Key Features of Fluoroelastomer (FKM)
- Temperature resistance from -20°C to +250°C (-4°F to +482°F)
- Excellent chemical resistance to oils, fuels, and aggressive fluids
- Superior compression set resistance even at elevated temperatures
- Low gas permeability compared to other elastomers
- Good mechanical properties including tensile strength and elongation
Technical Specifications
| Property | Value | Test Method |
|---|---|---|
| Hardness (Shore A) | 65-90 | ISO 48-4 |
| Tensile Strength | 10-25 MPa | ISO 37 |
| Elongation at Break | 100-300% | ISO 37 |
| Compression Set (22h at 200°C) | 15-50% | ISO 815 |
| Specific Gravity | 1.8-2.0 | ISO 2781 |
Available Fluoroelastomer Grades
- Standard FKM (Bisphenol cured)
- Peroxide-cured FKM
- Low-temperature FKM
- Fuel-resistant FKM
- FDA-compliant FKM
- ETP (Extreme Temperature Performance) FKM
Fluoroelastomer FAQ
What is the maximum continuous operating temperature for Fluoroelastomer?
Standard Fluoroelastomer can withstand continuous temperatures up to 200°C (392°F), while special grades can operate up to 250°C (482°F) for shorter periods. Prolonged exposure above these temperatures may cause degradation of physical properties.
How does Fluoroelastomer compare to other high-performance elastomers?
Fluoroelastomer offers superior chemical resistance compared to HNBR and better high-temperature performance than silicone rubber. While more expensive than NBR or EPDM, FKM provides the best balance of chemical and thermal resistance for demanding applications.
What chemicals should be avoided with Fluoroelastomer?
While Fluoroelastomer shows excellent resistance to most hydrocarbons, it should not be used with ketones (like acetone), certain esters, amines, and hot hydrofluoric acid. Always consult chemical compatibility charts for specific applications.
Typical Applications
- Automotive fuel system components
- Aerospace seals and gaskets
- Oilfield equipment seals
- Chemical processing equipment
- Pharmaceutical manufacturing components
- Semiconductor industry seals
Chemical Resistance Chart
| Chemical | Resistance Level | Max Temp. |
|---|---|---|
| ASTM Fuel C | Excellent | 150°C |
| Methanol | Good | 100°C |
| Skydrol 500B | Excellent | 120°C |
| 10% NaOH | Good | 100°C |
| Acetone | Poor | Not Recommended |
Storage & Handling Recommendations
- Store in original packaging until use
- Keep in cool, dry conditions away from direct sunlight
- Ideal storage temperature: 15-25°C (59-77°F)
- Maximum storage time: 5 years from manufacture date
- Avoid contact with ozone-generating equipment