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HexTow® AS40 pages
HexTow® AS4
Carbon Fiber
Product Data
®
HexTow AS4 carbon fiber is a continuous, high strength, high strain, PAN based fiber available in 3,000 (3K),
6,000 (6K) and 12,000 (12K) filament count tows. This fiber has been surface treated and can be sized to improve
its interlaminar shear properties, handling characteristics, and structural properties, and is suggested for use in
weaving, prepregging, filament winding, braiding, and pultrusion.
AS4-GP 3k (1%), AS4-GP 12k (0.9%), and AS4 12k carbon fibers have been qualified to NMS 818 Carbon Fiber
Specification (NCAMP). This allows customers to call out an industry standard, aerospace grade carbon fiber without
the need to write and maintain their own specification.
Typical Fiber Properties
Tensile Strength
3K
6K
12K
Tensile Modulus (Chord 6000-1000)
Ultimate Elongation at Failure
3K
6K
12K
Density
Weight/Length
3K
6K
12K
Approximate Yield
3K
6K
12K
Tow Cross-Sectional Area
3K
6K
12K
Filament Diameter
U.S. Units
SI Units
670 ksi
640 ksi
640 ksi
33.5 Msi
4,620 MPa
4,410 MPa
4,410 MPa
231 GPa
1.8%
1.7%
1.7%
3
0.0647 lb/in
1.8%
1.7%
1.7%
3
1.79 g/cm
-6
11.8 x 10 lb/in
-6
23.9 x 10 lb/in
-6
48.0 x 10 lb/in
0.210 g/m
0.427 g/m
0.858 g/m
7,086 ft/lb
3,485 ft/lb
1,734 ft/lb
4.76 m/g
2.34 m/g
1.17 m/g
-4
2
2
1.82 x 10 in
-4
2
3.70 x 10 in
-4
2
7.43 x 10 in
0.280 mil
0.12 mm
2
0.24 mm
2
0.48 mm
7.1 microns
Carbon Content
94.0%
94.0%
Twist
Never Twisted
Never Twisted
Typical HexPly 8552 Composite Properties
(at Room Temperature)
U.S. Units
SI Units
0º Tensile Strength
320 ksi
2,205 MPa
0º Tensile Modulus
20.5 Msi
141 GPa
Test Method
ASTM D3039
0º Tensile Strain
1.55%
274 ksi
1,889 MPa
0º Flexural Modulus
18.4 Msi
127 GPa
0º Short Beam Shear Strength
18.5 ksi
128 MPa
0º Compressive Strength
222 ksi
1,530 MPa
0º Compressive Modulus
18.6 Msi
128 GPa
0˚ Open Hole Tensile Strength
64 ksi
438 MPa
ASTM D5766
90º Tensile Strength
11.7 ksi
81 MPa
ASTM D3039
Fiber Volume
1.55%
0º Flexural Strength
60%
60%
ASTM D790
ASTM D2344
ASTM Mod. D695
