Impact Resistant Composite · Aramid Fiber Reinforced Polymer
Kevlar
Kevlar is an impact resistant composite composite — aramid impact laminate. Typical values: 280 MPa yield, 1.44 g/cm³, rated to 200 °C. Available for CNC machining, Sheet metal at FabDigit.
Properties
Typical room-temperature values in the Epoxy Matrix condition. Metric first, imperial in gray. The bars show where Kevlar sits against the other 12 composite grades in the catalog.
Datasheet
| Yield strength | 280 MPa41 ksi |
|---|---|
| Tensile strength | 1,100 MPa160 ksi |
| Hardness | 90 HRM |
| Density | 1.44 g/cm³0.052 lb/in³ |
| Specific strength (yield ÷ density) | 194 |
| Min service temp | -50 °C-58 °F |
| Max service temp | 200 °C392 °F |
| Electrical conductivity | < 0.001 % IACSinsulator |
| Machinability | Poor20 / 100 |
| Weldability | Not recommended5 / 100 |
| Formability | Not recommended5 / 100 |
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Against other composite grades
Strength versus weight in the composite family
Yield strength against density for every composite grade FabDigit runs. Kevlar is highlighted; hover a dot for its name, or open the interactive family chart.
Manufacturability
The process limits FabDigit's quote engine applies to Kevlar. Design inside these and the part quotes instantly; outside them it routes to an engineer.
CNC machining
| Machinability | Poor20 / 100 |
|---|---|
| Cutting speed (rough / finish) | — / — |
| Minimum wall | — |
| Minimum internal radius | — |
| Drill depth limit | — |
| Best surface (machined / polished) | Ra — / — |
| Hardenable after machining | — |
Sheet metal
| Formability | Not Recommend5 / 100 |
|---|---|
| Weldability | Not Recommend5 / 100 |
Conditions and tempers
How Kevlar is supplied and what each state is for. The default is what FabDigit quotes unless your drawing says otherwise.
| Condition | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
Epoxy MatrixDefault Matrix | Strongest laminate (G-10/FR-4) — structural + electrical parts | — | — | — | — |
Heat treatment and post-processing
Operations FabDigit's suppliers routinely run on Kevlar, ranked by how often they make sense for this grade.
Post-processing
| Manual Deburr | Deburrstandard |
|---|---|
| Edge Break (0.5mm) | Deburr |
| CMM Inspection | Inspection |
| FAI Report | Inspection |
| Individual Bag | Packaging |
Surface finishes for Kevlar
Coatings and treatments compatible with composite on the processes Kevlar runs on. Pick them in the quote configurator or call them out on the drawing.
Organic Coating
- Painting
Marking / Decoration
- Chemical Etching
- Dot Peen Marking
- Electro-chemical Etching
- Embossing / Debossing
- Ink Stamping
- Laser Marking
- Mechanical Engraving
- Vibro Engraving / Scribing
Equivalent designations
Standards and trade names that resolve to Kevlar in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Trade names
- AFRP
- Other
- Kevlar 49 Composite
Stock forms
Raw-material forms FabDigit sources Kevlar in.
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.