Kalrez® 4079 perfluoroelastomer parts are a low compression set product for general purpose use in O-rings, diaphragms, seals and other parts used in the chemical process and aircraft industries. It is a carbon black filled product with excellent chemical resistance, good mechanical properties, and outstanding hot air aging properties. It exhibits low swell in organic acids, inorganic acids and aldehydes, and has good response to temperature cycling effects. A maximum service temperature of 316°C (600°F) is suggested, with short excursions to higher temperatures possible. Kalrez® 4079 is not recommended for use in hot water/steam applications or in contact with certain hot aliphatic amines, ethylene oxide, or propylene oxide.
Polymer Name: Perfluoroelastomer (FFKM)
Physical Form: Seals, Custom, Diaphragms, O-rings
Features: Good Mechanical Properties, High Temperature Resistance, Heat Aging Resistant, Low Compression Set, Good Thermal Stability, Chemical Resistant, General Purpose
End Uses: Semiconductor Applications, Pump Parts, Aircraft Applications
Color: Black
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Kalrez® 4079 Features & Benefits
Product Highlights
- Good response to temperature cycling effects
- Outstanding hot air aging properties
- It exhibits low swell in organic and inorganic acids
Performance Characteristics
Figure 1 : Compression set at 204°C
Figure 2 : Sealing force retention at 204°C
Figure 3 : Performance Comparison
Applications & Uses
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Plastics & Elastomers End Uses
Properties
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Typical Properties
| Value | Units | Test Method / Conditions | |
| Compression Set (70 hr at 204°C (400 °F)) | 14 | % | ASTM D395B |
| Compression Set (70 hr, 204°C, 400°F) | 14 | % | ASTM D395B |
| Lowest Service Temperature | -19 (-2.2) | °C (°F) | - |
| Color | Black | - | - |
| Hardness | 75 | Shore A | ASTM D2240 |
| 100% Modulus | 7.24 (1050) | MPa (psi) | ASTM D412 |
| Hardness - Shore A | 75 | - | ASTM D2240 |
| Maximum Service Temperature | 316 (600) | °C (°F) | - |
| Elongation at Break | 150 | % | ASTM D412 |
| Tensile Strength at Break | 16.88 (2450) | MPa (psi) | ASTM D412 |
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