CFRP AS4/3501-6 Quasi-Isotropic

Verifiedcomposite
· AS4/3501-6· AS4 QI laminate

AS4/3501-6 quasi-isotropic CFRP is a carbon fiber reinforced epoxy composite with balanced fiber orientation (0°, ±45°, and 90°) designed to provide uniform stiffness and strength in multiple load directions. The layup consists of eight plies of Hexcel AS4 carbon fiber in a 3501-6 epoxy matrix, processed via autoclave prepreg curing, creating a material suitable for applications requiring multidirectional load resistance without a dominant stress direction. This quasi-isotropic architecture makes it a go-to choice over unidirectional or angle-ply laminates when loading conditions are complex or unpredictable, though engineers sacrifice peak performance in any single direction compared to tailored layups.

aerospace structureswind turbine bladespressure vesselsautomotive body panelssporting goods (ski/racquet frames)general-purpose composite parts

Compliance & Regulations

?ITAR?EAR?Conflict Free?RoHS?REACH?TSCA?Prop 65
Units:
siimperial
Composite Layup8 plies · 1.00 mm total

Fiber Direction

-45°
+0°
+45°
+90°
Drag to rotate · Scroll to zoom · → = 0° reference
FiberHexcel AS4 Carbon
MatrixHexcel 3501-6 Epoxy
ProcessAutoclave prepreg
Cure177°C / 120 min / 0.69 MPa
Vf62%

Ply Schedule

+0°AS4 Carbon0.125 mm
+45°AS4 Carbon0.125 mm
-45°AS4 Carbon0.125 mm
+90°AS4 Carbon0.125 mm
+90°AS4 Carbon0.125 mm
-45°AS4 Carbon0.125 mm
+45°AS4 Carbon0.125 mm
+0°AS4 Carbon0.125 mm

Laminate Code

[0/45/-45/90/90/-45/45/0]s

Fiber angles relative to the 0° reference direction (red arrow in 3D view). 0° = longitudinal, 90° = transverse, ±45° = shear paths.

Property OverviewNormalized to typical max values
PropertyValueUnitConditionsSource
Poisson's Ratio(ν)
0.3100
-—
Shear Modulus(G)
21.00
GPa—
Ultimate Tensile Strength(σUTS)
580.0
MPa—
Young's Modulus(E)
55.00
GPa—
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Glass Transition Temperature(Tg)
473
K—
Maximum Service Temperature(Tmax)
450
K—
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Density(ρ)
1.580
kg/m³—
Verified Unverified Low confidence (<80%) Link to source

Regulatory Screening

Environmental

Export Control

Quality & Standards

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.