Cytec Engineered Materials
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Cytec Carbon Fibers


Thornel® P-25 Continuous Pitch-Based Fiber

Typical Properties**of Thornel P-25 Continous Pitch-Based Fiber
Typical Values
U.S. Customary Units SI Units
Fiber Characteristics Units Units
Tensile Strength 200 ksi 1.38 GPa
Tensile Modulus 23 Msi 159 GPa
Density 0.069 lbs/in³ 1.90 g/cc
Elongation at Break 0.9 %   
Filament Diameter 11 micron   
Carbon Assay 99+ %   
Surface Area 0.70 m²/g   
Electrical Resistivity 13 micro-ohm-m   
Thermal Conductivity 13 BTU/hrft°F 22 W/mK
CTE at 70°F(21°C)   -0.30 ppm/°F  -0.60 ppm/°C 
 
Tow Count (1000s of filaments per strand)
Strand Construction Units 2K* 4K*  
Yield yd/lb 1,500 700  
m/g 3.01 1.40  
Linear Density g/m 0.332 0.715  
Fiber Area in Yarn
Cross Section
in2x10-5 26 59  

*K refers to 1,000's of filaments in a strand
**Typical properties, actual properties of individual lots will vary within specification limits.
Thornel and ThermalGraph are registered trademarks, and EnerGraph is a trade mark of Cytec Carbon Fibers LLC.
Technical information contained herein is furnished without charge or obligation and is given and accepted at recipient's sole risk. Because conditions of use may vary and are beyond our control, Cytec Carbon Fibers LLC makes no representation about, and is not responsible or liable for the accuracy or reliability of data, nor toxicological effects or industrial hygiene requirements associated with particular uses of any product described herein. Nothing contained in this document shall be considered a recommendation for any use that may infringe patent rights, or an endorsement of any particular material, equipment, service, or other item not supplied by Cytec Carbon Fibers LLC. The properties and applications listed in this document are not specification. They are provided as information only and in no way modify, amend, enlarge or create any specification or warranty.
 
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