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L-956
Laminating Woven Graphite Prepreg |
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| Cure Cycles Continued... |
To enhance the high temperature properties, a post cure may be used:
- 2 hours at 300°F (149°C) followed by 2 hours at 375°F (191°C)
- L-956 may be bonded into various structures using L-313 high temperature adhesive and L-309 corrosion inhibiting primer. 350°F (177°C) flatwise tension values with L-313 adhesive exceed 950 PSI (6.6 MPa) against 1/8” (3.175 mm) cell aluminum core.
- Typical construction techniques utilize a layer of fiberglass prepreg such as L-556 for dissimilar metal protection against metallic details or metal honeycomb. In addition a layer of L-556 may be used to provide softening of graphite to metal joints where local loads need to be distributed to avoid local metal overload failure.
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| Mechanical Data |
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LAMINATE PROPERTIES |
PROPERTY |
139 |
100 |
145 UD |
TEST METHOD |
TENSILE STRENGTH |
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Room Temp. |
104 KSI (717 MPa) |
71 KSI (483 MPa) |
299 KSI (2.1 GPa) |
ASTM D638 |
250°F (121°C) |
98 KSI (676 MPa) |
68 KSI (469 MPa) |
- |
ASTM D638 |
300°F (149°C) |
95 KSI (655 MPa) |
- |
285 KSI (2.0 GPa) |
ASTM D638 |
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TENSILE MODULUS |
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Room Temp. |
9.1 MSI (63 GPa) |
9.0 MSI (62 GPa) |
18.6 MSI (128 GPa) |
ASTM D638 |
250°F (121°C) |
8.7 MSI (60 GPa) |
8.7 MSI (60 GPa) |
- |
ASTM D638 |
300°F (149°C) |
8.0 MSI (55 GPa) |
- |
17.5 MSI (121 GPa) |
ASTM D638 |
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COMPRESSIVE STRENGTH |
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Room Temp. |
85 KSI (586 MPa) |
73 KSI (503 MPa) |
184 KSI (1.3 GPa) |
ASTM D695 |
300°F (149°C) |
68 KSI (469 MPa) |
- |
152 KSI (1.0 GPa) |
ASTM D695 |
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COMPRESSIVE MODULUS |
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Room Temp. |
8.6 MSI (59 GPa) |
8.6 MSI (59 GPa) |
14.5 MSI (100 GPa) |
ASTM D695 |
300°F (149°C) |
8.5 MSI (59 GPa) |
- |
14.1 MSI (97 GPa) |
ASTM D695 |
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SHORT BEAM SHEAR |
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Room Temp. |
9.2 KSI (63 MPa) |
- |
16.4 KSI (113 MPa) |
ASTM D2344 |
300°F (149°C) |
7.6 KSI (52 MPa) |
- |
9.0 KSI (62 MPa) |
ASTM D2344 |
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NOTICE:Product data and parameters cited in this publication have been obtained in J.D. Lincoln, Inc. laboratories using the materials under carefully controlled conditions. The information, therefore, is believed to be accurate and correctly stated. Data of this type may be considered to be indicative of representative properties obtainable. J.D. Lincoln, Inc. cannot accept responsibility for the misapplication of these products, nor for their use under uncontrolled conditions. Numerical values resulting from the application of this material are dependant on processing details. It is recommended that the user develop his or her own application techniques and generate data consistent with his or her specific application and process.
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