Tenax® UMS2526 Carbon Fiber

Tenax UMS2526 Carbon Fiber is a high-modulus, ultra-high-strength polyacrylonitrile (PAN)-based fiber optimized for demanding structural applications in aerospace and defense. This grade offers exceptional strand tenacity exceeding 430 kg/mm² and a modulus of elasticity over 28 ton/mm², making it suitable for composites where maximum stiffness and minimal thermal expansion are critical. With a fiber diameter between 1 to 6 µm and density around 1.76 g/cm³, UMS2526 strikes a balance between mechanical performance and low weight. It is commonly used in satellite panels, rocket nose cones, and advanced stress-bearing elements in airframes and rotorcraft. These fibers are frequently embedded in epoxy and ceramic matrices to produce ultra-lightweight components that surpass steel in tensile strength while outperforming titanium in stiffness-to-weight ratio. Their use in stress rods, vehicle chassis, and ultralight aerospace tubes illustrates their versatility. Tenax UMS2526 represents the frontier of fiber-reinforced composites, enabling next-generation aerospace systems with improved fuel efficiency, reliability, and structural longevity.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Fibre

Filament Diameter		±25%
Number Of Yarns		±10%
Number Of Filaments		±10%
Tex Number		±10%
Length		+5% / -1%

Material Properties for Metals

Atomic Properties

Element	Value
Atomic number	6
Crystal structure	Hexagonal/Diamond
Electronic structure	He 2s² 2p²
Valences shown	2, 3, 4
Atomic weight( amu )	12.011
Thermal neutron absorption cross-section( Barns )	0.0034
Photo-electric work function( eV )	4.8
Natural isotope distribution( Mass No./% )	12/ 98.89
Natural isotope distribution( Mass No./% )	13/ 1.11
Atomic radius - Goldschmidt( nm )	0.077
Ionisation potential( No./eV )	6/ 490
Ionisation potential( No./eV )	4/ 64.5
Ionisation potential( No./eV )	1/ 11.26
Ionisation potential( No./eV )	3/ 47.9
Ionisation potential( No./eV )	2/ 24.38
Ionisation potential( No./eV )	5/ 392

Mechanical Properties

Element	Value
Hardness - Mohs	0.5-1
Hardness - Mohs	10
Material condition	Diamond
Material condition	Graphite
Bulk modulus( GPa )	33
Bulk modulus( GPa )	542
Tensile modulus( GPa )	4.8

Electrical Properties

Element	Value
Electrical resistivity( µOhmcm )	1375@0@0°C
Thermal emf against Pt (cold 0C - hot 100C)( mV )	0.7

Physical Properties

Element	Value
Boiling point( C )	5000
Density( gcm⁻³ )	2.25@20°C

Thermal Properties

Element	Value
Melting point( C )	3650
Specific heat( J K⁻¹ kg⁻¹ )	712@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	80-240@0-100°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	0.6-4.3@0-100°C