AS4/3501-6 Unidirectional Tape (MIL-HDBK-17)

Verifiedcomposite
· AS4/3501-6 UD· 3501-6 Tape

AS4/3501-6 is a unidirectional carbon fiber reinforced epoxy prepreg system combining Hexcel's AS4 carbon fibers (12K tow) with 3501-6 epoxy matrix, designed for autoclave processing at 175°C. This material is a industry-standard choice for aerospace primary structures, defense applications, and high-performance composite parts where fiber alignment in a single direction is critical for load-bearing efficiency. Engineers select it over multi-directional laminates when maximum stiffness and strength along the primary load axis outweigh omnidirectional property needs, and its well-documented MIL-HDBK-17 qualification makes it a preferred baseline for structural certification and damage-tolerance analysis.

aircraft fuselage and wing skinsspace launch vehicle structuresmilitary aircraft componentshigh-performance sporting equipmentwind turbine bladesmissile and drone structures

Compliance & Regulations

?ITAR?EAR?Conflict Free?FDA?RoHS?REACH?TSCA?Prop 65
Units:
siimperial
Composite Layup1 ply · 0.13 mm total

Fiber Direction

+0°
Drag to rotate · Scroll to zoom · → = 0° reference
FiberHexcel AS4 Carbon (12K)
MatrixHexcel 3501-6 Epoxy
ProcessAutoclave prepreg (350°F/175°C cure)
Cure175°C / 120 min / 0.59 MPa autoclave
Vf62%

Ply Schedule

+0°AS4/3501-60.134 mm

Laminate Code

[0]T

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
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Orientation
PropertyValueUnitConditionsSource
Compressive Strength(σc)
41.92
ksiT
Poisson's Ratio(ν)
0.3000
-notes
Shear Modulus(G)
860.1
ksinotes
Ultimate Tensile Strength(σUTS)
8.847
ksiT
Young's Modulus(E)
20,450.3
ksiL
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Glass Transition Temperature(Tg)
391.7
°Fnotes
Thermal Conductivity(k)
0.3467
BTU/(hr·ft·°F)T
Coefficient of Thermal Expansion(α (CTE))
13.89
µin/in·°FT
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Density(ρ)
0.05708
lb/in³—
Verified Unverified Low confidence (<80%) Link to source

Regulatory Screening

Environmental

Export Control

Safety & Biocompatibility

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.