HRC 7748 is a lightweight, closed-cell fluorosilicone sponge material, developed to meet the SAE AMS 3323 specification. The sheets are designed for use in aircraft and aerospace industries, where gaskets are subjected to extremely harsh environments involving various chemicals, fuels, and a wide variety of temperature extremes. This material has passed all requirements for exposure to jet fuel per the ASTM D 471 Fuel B specification.
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Application Advantages
- Lightweight
- Resistance to temperature extremes
- Excellent gasket material
- Low closure force
- Very low compression set
- Ultraviolet ray (UV) resistant
- Ozone resistant
- Non-conductive insulating material
- Fuel resistance
Typical Physical Properties
| Property | Test Method | Value |
|---|---|---|
| 25% Compression Deflection | ATMD D1056 | 2 - 9 psi |
| 50% Compression Set (22 hrs @ +212°F) | ASTM D1056 | 25% |
| Density (max.) | ASTM D1056 | 0.02575% |
| Fluid Resistance | ASTM D471 (Fuel B) | Weight change 0-50% |
| Temperature Resistance (continuous) | -85°F to +400°F |
Specifications
SAE AMS 3323 CLASS 1
Availability
Sheet goods 36″ x 36″
Ranging from .125″ to 1″ thicknesses