Kevlar 49 Aramid Fiber (DuPont)

Verifiedcomposite

· Kevlar 49· K49· Aramid 49

Kevlar 49 is a para-aramid synthetic fiber produced by DuPont, engineered for applications demanding exceptional strength-to-weight performance and dimensional stability under load. It is widely deployed in aerospace composites, ballistic protection systems, and marine structures where engineers need to minimize weight while maintaining structural integrity and resistance to impact. Compared to glass fiber and carbon fiber alternatives, Kevlar 49 offers superior impact absorption and damage tolerance, making it the preferred choice when toughness and energy dissipation are critical alongside lightweight design.

ballistic protection / body armoraerospace composites and structural componentsmarine and automotive reinforcementimpact-resistant sports equipmenthigh-performance rope and cablevibration damping applications

Compliance & Regulations

?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

si imperial

Property OverviewNormalized to typical max values

Property	Value	Unit	Conditions
Elongation at Break(εf)	2.800	-	—
Ultimate Tensile Strength(σUTS)	3.620	GPa	—
Young's Modulus(E)	131.0	GPa	—

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Coefficient of Thermal Expansion(α (CTE))	-0.00000490	1/K	—

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Density(ρ)	1.440	kg/m³	—

Verified Unverified Low confidence (<80%) Link to source

Regulatory Screening

Environmental

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.

Kevlar 49 Aramid Fiber (DuPont)

Mechanical Properties

Thermal Properties

Physical Properties

Regulatory Screening

Environmental