EOS HT-23 (PEKK-CF) (PEKK, SLS)
EOS · SLS powder
EOS's PEKK powder for Selective Laser Sintering.
EOS datasheet values, printed parts
Other PEKK grades and fills
Compare the PEKK products and conditions in the library; see the grade overview at PEKK.
Compare all 8 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
EOS HT-23 (PEKK-CF)This page SLS powder | — | — | 71 | 1.2 | — |
ESD / static-dissipative | Use for satellite, fuel-system and electronics-handling parts requiring controlled surface resistivity without sacrificing PEKK's heat and FST behaviour. | 85 | 87 | 2.5 | 87 Shore D |
FFF/FDM filament grade | Pick when quoting as-printed extruded parts; expect strong anisotropy with Z-direction roughly 60–70 % of in-plane strength. | 90 | 93 | 4 | 86 Shore D |
Kepstan 6000-type | Pick when the widest processing window and lowest melt temperature are needed (powder bed fusion, composite prepreg, coatings). | 100 | 100 | 25 | 85 Shore D |
Kepstan 7000-type | General-purpose balance of crystallisation rate, heat performance and processability; typical basis for filament and injection grades. | 100 | 100 | 15 | 86 Shore D |
Kepstan 8000-type | Use only when maximum crystallinity, chemical resistance and short-term temperature capability justify the very narrow 400 °C+ processing window. | 105 | 105 | 8 | 87 Shore D |
Carbon-fiber reinforced | Use where maximum stiffness, dimensional stability and low CTE are needed (aerospace brackets, tooling); sacrifices ductility and abrades tooling. | — | 145 | 2 | — |
30 % glass-fiber reinforced | Pick for stiff, creep-resistant, electrically insulating parts at elevated temperature at lower cost than carbon fiber. | — | 160 | 2.5 | — |
What is EOS HT-23 (PEKK-CF)?
EOS HT-23 (PEKK-CF) is EOS' PEKK (CF-filled) powder for Selective Laser Sintering on EOS FORMIGA P 110 / P 396 / P 500 / P 770. EOS HT-23 (PEKK-CF) has a tensile strength of 71 MPa (10.3 ksi), stronger than 77% of polymer grades. Elongation at break is 1.16% and the elastic modulus is 6.5 GPa (0.943 Msi). EOS HT-23 (PEKK-CF) has a density of 1.39 g/cm³ (0.0502 lb/in³), heavier than 78% of polymer grades.
Advantages
- Stiff — 6.5 GPa (0.943 Msi), better than 90% of polymer grades
Limitations
- Limited ductility — 1.16%, worse than 98% of polymer grades
- Heavy — 1.39 g/cm³ (0.0502 lb/in³), worse than 78% of polymer grades
About this powder
- Manufacturer
- EOS
- Product
- HT-23 (PEKK-CF)
- Base polymer
- PEKK — carbon-fibre reinforced
- Process
- Selective Laser Sintering (SLS)
- Printers
- EOS FORMIGA P 110 / P 396 / P 500 / P 770
- As-printed colour
- Black — 23% carbon fiber
- Build envelope
- 340 × 340 × 600 mm. Usable part size depends on orientation, spacing and process allowances.
- Build atmosphere
- Inert atmosphere specified; confirm the gas and settings for the printer/material profile.
- Reported material classifications
- FAR 25.853. Scope and test conditions apply; these do not certify the finished part or assembly.
- Manufacturer data source
- EOS source reference
- FabDigit material reference
- Download reference PDF — FabDigit layout with EOS data and source attribution.
- Ordering
- Specify this powder in your quote notes for an availability review.
Choosing HT-23 (PEKK-CF)
Carbon-fibre-filled PEKK for high-temperature, high-stiffness applications that warrant a specialty SLS material review.
- Consider it for
- High-temperature fixtures · Lightweight stiff aerospace-development components · Rigid parts with demanding heat-deflection targets
- Tradeoffs
- Its high stiffness and HDT come with extremely low elongation. The cited FAR material result is not a certification of a final finished part or installation.
- Design and validation
- Avoid impact-driven geometries and sharp transitions. Define the target process, orientation, conditioning and required fire test before relying on any TDS value.
- Finishing
- Black is inherent to the CF-filled powder. Use mechanical cleanup only after checking dimensional requirements; do not assume cosmetic coatings retain thermal or fire performance.
- Before choosing
- Is the service temperature truly beyond PA12-GF or PA6-MF capability? Are stiffness and heat resistance worth the low-strain design constraint?
Selection notes based on EOS HT-23 product page. Published test results depend on the stated printer, orientation and conditioning. Compare material families · Choose a finishing route.
EOS HT-23 (PEKK-CF) properties
Typical values for EOS HT-23 (PEKK-CF); review each property’s test condition. Only this product’s reported properties are shown; unreported properties are omitted. Bars are the position among polymer grades.
Mechanical3
EOS HT-23 (PEKK-CF) has a tensile strength of 71 MPa (10.3 ksi), stronger than 77% of polymer grades. Elongation at break is 1.16% and the elastic modulus is 6.5 GPa (0.943 Msi).
per EOS Store typical part properties
per EOS Store typical part properties
per EOS Store typical part properties
Thermal2
per EOS Store typical part properties; Reported at 1.82 MPa
per EOS Store typical part properties
Physical1
EOS HT-23 (PEKK-CF) has a density of 1.39 g/cm³ (0.0502 lb/in³), heavier than 78% of polymer grades.
per EOS Store typical part properties
Use published values for design screening. Confirm the grade, build direction, conditioning and available lot documentation when quoting.
EOS HT-23 (PEKK-CF) — frequently asked
What is EOS HT-23 (PEKK-CF) used for?
Carbon-fibre-filled PEKK for high-temperature, high-stiffness applications that warrant a specialty SLS material review. Consider it for high-temperature fixtures, lightweight stiff aerospace-development components and rigid parts with demanding heat-deflection targets. Its high stiffness and HDT come with extremely low elongation. The cited FAR material result is not a certification of a final finished part or installation.
What should I validate before using EOS HT-23 (PEKK-CF)?
Avoid impact-driven geometries and sharp transitions. Define the target process, orientation, conditioning and required fire test before relying on any TDS value. Is the service temperature truly beyond PA12-GF or PA6-MF capability? Are stiffness and heat resistance worth the low-strain design constraint?
How can EOS HT-23 (PEKK-CF) be finished?
Black is inherent to the CF-filled powder. Use mechanical cleanup only after checking dimensional requirements; do not assume cosmetic coatings retain thermal or fire performance.
Sources
Product values come from the selected manufacturer source and are normalised for comparison. Confirm the quoted process, build direction, conditioning and available lot documentation for the finished part.