Enhanced TDS
Knowde-enriched technical product data sheet
Identification & Functionality
- Chemical Family
- Polymer Name
- Composite Materials Functions
- Technologies
Features & Benefits
- Product Highlights
- Service temperature up to 200ºF (93ºC)
- Extremely damage-resistant system
- 350ºF (177ºC) Cure
Applications & Uses
Properties
- Physical Form
- Mechanical Properties
- Typical Properties
| Value | Units | Test Method / Conditions | |
| Tensile strength at 77°C (25°F) (Dry) | 400 | ksi | - |
| Tensile Modulus at 77°C (25°F) (Dry) | 23 | msi | - |
| Tensile elongation at 77°C (25°F) (Dry) | 1.64 | % | - |
| Tensile strength at 77°C (25°F) (Dry) | 11 | ksi | - |
| Tensile Modulus at 77°C (25°F) (Dry) | 1.21 | msi | - |
| Tensile elongation at 77°C (25°F) (Dry) | 1 | % | - |
| Quasi tensile strength at 77°C (25°F) (Dry) | 135 | ksi | - |
| Quasi tensile strength at 77°C (25°F) (Dry) | 8.4 | ksi | - |
| Quasi tensile strength at 77°C (25°F) (Dry) | 1.58 | ksi | - |
| Compression strength at 77°C (25°F) (Dry) | 235 | ksi | - |
| Compression strength at 180°C (82°F) (Dry) | 200 | ksi | - |
| Compression strength at 250°C (121°F) (Dry) | 185 | ksi | - |
| Compression strength at 180°C (82°F) (Wet) | 160 | ksi | - |
| Compression Modulus at 77°C (25°F) (Dry) | 21.5 | msi | - |
| Compression Modulus at 180°C (82°F) (Dry) | 21 | msi | - |
| Compression Modulus at 250°C (121°F) (Dry) | 22.1 | msi | - |
| Compression Modulus at 180°C (82°F) (Wet) | 20.7 | msi | - |
| Compression Modulus at 220°C (104°F) (Wet) | 21.7 | msi | - |
| Compression after impact at 77°C (25°F) (Dry) | 85 | ksi | - |
| Unimpacted after 500 in-inlb/in impact at 77°C (25°F) (Dry) | 67 | - | - |
| Unimpacted after 1,500 in-inlb/in impact at 77°C (25°F) (Dry) | 50 | - | - |
| Unimpacted after 2,000 in-inlb/in impact at 77°C (25°F) (Dry) | 47 | - | - |
| Unimpacted after 2,500 in-inlb/in impact at 77°C (25°F) (Dry) | 44 | - | - |
| Unimpacted after 3,000 in-inlb/in impact at 77°C (25°F) (Dry) | 33 | - | - |
| Short beam shear at 77°C (25°F) (Dry) | 14.5 | ksi | - |
| Short beam shear at 180°C (82°F) (Wet) | 11.5 | ksi | - |
| Short beam shear at 250°C (121°F) (Wet) | 10 | ksi | - |
| Short beam shear at 180°C (82°F) (Wet) | 10 | ksi | - |
| Short beam shear at 250°C (121°F) (Dry) | 8.2 | ksi | - |
| Short beam shear at 265°C (129°F) (Dry) | 5.8 | ksi | - |
| In-plane ± 45 tensile shear strength at 77°C (25°F) (Dry) | 17 | ksi | - |
| In-plane ± 45 tensile shear Modulus at 77°C (25°F) (Dry) | 0.85 | msi | - |
| Open hole compression strength at 77°C (25°F) (Dry) | 42 | ksi | - |
| Open hole compression strength at 180°C (82°F) (Wet) | 37 | ksi | - |
| Open hole compression strength at 220°C (104°F) (Wet) | 36 | ksi | - |
| Value | Units | Test Method / Conditions | |
| Tg (Dry) | 315 (157) | °F (°C) | - |
| Tg (Wet) | 240 (116) | °F (°C) | - |
| Equilibrium moisture absorption | 3.1 | % | - |
| Tensile Strength | 14.4 | ksi | - |
| Tensile Modulus | 0.593 | Msi | - |
| Tensile Strain | 4.4 | % | - |
| Fracture Toughness, K1C | 3.19 | ksi | - |
| Strain energy release rate, G1C | 5.46 | in-lb/in2 | - |
| Gel time at 350°F (177ºC) | min. 8-16 | - | - |
| Minimum viscosity at 265–300°F (129–149ºC) | -19 | poise | - |
| Tack life at RT | 40 days | - | - |
| Standard cure at 350°F (177ºC) | 2 | hr | - |
| Resin Content | 34-40 | % | - |
| Areal weight GSM | 90-190 | - | - |
| Volatiles | max. 1.0 | % | - |
| Cured thickness per ply | Various | - | - |
| Fiber volume | 60 | % | - |
| Density | 1.272 | g/cc | - |
Packaging & Availability
- shipping
Prepreg is usually shipped in a sealed polyethylene bag.
Storage & Handling
- Storage
HexPly® 8551-7 prepreg should be sealed in a polyethylene bag and refrigerated, preferably below 32°F (0°C). Following removal from refrigerated source, allow the prepreg to reach room temperature before opening the polyethylene bag to prevent moisture condensation.
- Product Handling and Safety
Hexcel recommends that customers observe established precautions for handling resins and fine fibrous materials. Operators working with this product should wear clean, impervious gloves to reduce the possibility of skin contact and to prevent contamination of the material.