3D Printing Info

Filament comparison

PEKK vs PETG-CF

Compare printing settings, strength, heat resistance, dated prices and sources.

PEKK guideCarbon-fibre PETG (PETG-CF) guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PEKK comparisonsMore PETG-CF comparisons
PEKK vs PETG-CF — documented properties and sources
PropertyPEKKHIGHTEMPCarbon-fibre PETG (PETG-CF)PETG
Market snapshot
Listing priceUSD/kg; dated snapshots$525.00/kg median; $332.50–$771.12/kg across 6 dated product listings$29.99/kg median; $16.00–$74.22/kg across 11 dated product listings
Identity & Market
Base polymer / chemistryPolyether ketone ketone, amorphous grade — a polyaryletherketone that stays amorphous, so it does not need PEEK's crystallisation control. Stratasys sells it as Antero 800NA and Antero 840CN03; category numbers below are unfilled unless a carbon grade is named[1][2]PETG reinforced with chopped carbon fibre[3][4]
Densityg/cm³1.28 unfilled (ASTM D792, Antero 800NA; 1.31 annealed) and 1.33 for CarbonX PEKK-A CF15 (ISO 1183)[2][1]1.25 (Bambu Lab) to 1.34 (3DXTech), ISO 1183; Prusament 1.27[3][5][4]
Typical priceUSD/kg1 kg-equivalent spools cluster near 550[6][7][8]1 kg-equivalent spools span 16–74; the middle of the market is about 29[3][9][10][11][12][13][14][15]
Price range across brandsUSD/kg333-771 across grades and formats; 3DXTech CarbonX PEKK-A+CF15 333 at 2 kg, 3D4Makers unfilled PEKK-A 485 at 2 kg, IEMAI 3D 500 at 1 kg, Kimya PEKK Carbon 771 at 500 g[6][7][8][16][17]16–74 across brands; ELEGOO 16 in a 5 kg pack, Reli3D 17, SUNLU 20, IEMAI 22, Siraya Tech 25, Bambu Lab 32, Sakata 3D 53, 3DXTech 67, Prusament 70, Filament PM 74 on 0.5 kg spools[18][3][6][9][10][11][12][13][14][15]
Market availability1–5Niche, a handful of specialist brands[6][7][8]Stocked by most mainstream brands[3][6][9][18]
Spool sizes & diameters1.75 and 2.85 mm; 200 g to 2 kg spools, plus Stratasys canisters[6][7][2]1.75 and 2.85 mm; 0.75 and 1 kg spools[6][3]
Typical applicationsAerospace interior and structural parts; 3DXTech labels its carbon-filled PEKK-A grade AERO and Stratasys certifies Antero 800NA for outgassing and FST[1][2]Stiff functional parts and fixtures where PETG's toughness is traded for rigidity and a matte finish[3][4]
Diameter tolerance± mmNot documented±0.02 (Prusament)[4]
Printing Parameters
Nozzle temperature°CNot documented240–270 (Bambu Lab); 265 ± 10 (Prusament)[3][4]
Bed temperature°C140 (3DXTech CarbonX PEKK-A CF15)[1]65–75 (Bambu Lab); 90 ± 10 (Prusament)[3][4]
Enclosure / chamber requirement1–5Actively heated chamber required[19][20]Open frame fine; draught shield helps — Bambu Lab specifies a 35–50 °C chamber[3]
Recommended chamber temperature°CNot documented35–50 (Bambu Lab)[3]
Part cooling fanNot documented0–60 % (Bambu Lab); 50 % (Prusament)[3][4]
Bed surface & adhesion aidNot documentedTextured PEI or engineering plate with glue (Bambu Lab)[3]
Maximum volumetric flow (mm³/s; see test conditions)mm³/sNot documented11.5 on My Tech Fun's Bambu Lab PETG-CF profile[21]
Bed-adhesion difficulty1–5Not documentedNeeds the right surface or a thin adhesive[3]
Stringing / oozing tendency1–5Not documentedSlight — the fibre reduces stringing against unfilled PETG[3][22]
Overall printing difficulty1–5Expert / industrial hardware only[19][20]Intermediate — dry filament and a tuned profile; hardened nozzle mandatory[3]
Hardware Wear & Reliability
Nozzle hardness required1–4Hardened steel required — the category spans unfilled PEKK, where brass is acceptable, and the carbon-filled aerospace grades that make up most of the market[1][2]Hardened steel required[3]
Abrasiveness1–5Highly abrasive — most PEKK filament sold is carbon-filled; unfilled Antero 800NA and ThermaX PEKK-A are non-abrasive[1][2]Highly abrasive — standard CF composite[3]
Nozzle clog risk1–5Moderate — needs dry filament and a clean nozzle; 3DXTech lists no special nozzle concerns but a mandatory 120 °C pre-dry before every print[23]Moderate — needs dry filament and a clean nozzle; 3DXTech specifies a hardened 0.4 mm minimum nozzle and 0.25 mm layers or higher, and Prusa lists composites as a higher clogging risk[24][25]
Heat-creep / jam sensitivity1–5Not documentedSlightly sensitive[22]
Hotend requirementNot documentedHardened steel nozzle; no high-temperature hot-end needed[3][22]
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Not documentedLow — 0.30 % saturated at 25 °C / 55 % RH (Bambu Lab)[3]
Equilibrium moisture content at ~50 % RH%Not documented0.30 saturated at 25 °C / 55 % RH (Bambu Lab); Prusa measures 0.10 after 7 days at 22 % RH[3][4]
Drying temperature & timeNot documented65 °C for 8 h (Bambu Lab)[3]
Symptoms when wetNot documentedBubbling and popping at the nozzle, stringing and a rough surface[26]
Effect of moisture on strengthNo dry-versus-conditioned figures are published; 3DXTech mandates a 120 °C, 4 h pre-dry before every print because trapped water flashes to steam at these nozzle temperatures[23]No dry-versus-conditioned figures published; Bambu Lab states PETG-CF must be properly dried before printing and stored dry after use[3][26]
Storage requirementNot documentedSealed with desiccant; Bambu Lab says store dry after use[3][26]
Mechanical Properties
Tensile strength (XY)MPa86.7-90.0 at yield and 73.0 at break (printed XZ, ASTM D638, Antero 800NA on the F900 and Fortus 450mc); 88.8 at break annealed; 126 at break for CarbonX PEKK-A CF15 (printed XY, ISO 527)[2][1]35 ± 5 (Bambu Lab) and 47 ± 2 at yield (Prusament) printed XY, ISO 527; 56 at break for 3DXTech[3][4][5]
Young's modulusMPa2640-3870 (printed XZ, ASTM D638, Antero 800NA; upper figure annealed); 9125 for CarbonX PEKK-A CF15 (printed XY, ISO 527)[2][1]2460 ± 230 (Bambu Lab) and 1700 (Prusament) printed XY, ISO 527[3][4]
Elongation at break%6.1 at break (printed XZ, ASTM D638, Antero 800NA); 2.3 in ZX; 3.15 for CarbonX PEKK-A CF15 (ISO 527)[2][1]4.3 at yield (Prusament, printed XY, ISO 527); 3 at break for 3DXTech[4][5]
Flexural strengthMPa136 at 5 % strain (printed XZ, ASTM D790, Antero 800NA); 178 for CarbonX PEKK-A CF15 (printed XY, ISO 178)[2][1]68 ± 3 printed horizontal, ISO 178 (Prusament)[4]
Flexural modulusMPa3200 (printed XZ, ASTM D790, Antero 800NA); 8817 for CarbonX PEKK-A CF15 (printed XY, ISO 178)[2][1]2300 printed horizontal, 3100 printed vertical, ISO 178 (Prusament)[4]
Other impact dataIzod notched 41.1 J/m XZ and 33.3 J/m ZX; unnotched 1730 J/m XZ against 203 J/m ZX (printed, ASTM D256/D4812, Antero 800NA)[2]Charpy unnotched 29 ± 6 printed horizontal and 43 ± 8 printed vertical (Prusament, ISO 179-1); Izod 4.91 kJ/m² on My Tech Fun bars[4][21]
Layer adhesion / Z tensileMPa50.1-59.4 at yield (printed ZX, ASTM D638, Antero 800NA); 56.0 for the ESD grade Antero 840CN03[2][27]29 ± 4 printed Z (Bambu Lab, ISO 527); 18 ± 3 by Prusa's interlayer adhesion test; 10.7 on My Tech Fun bars[3][4][21]
Brittleness1–5Moderate unfilled — 6.1 % elongation at break in plane; brittle in the carbon-filled grades at 3.15 %[2][1]Brittle — snaps with little warning[5]
Hardness (scale-specific)Shore A / Shore D / RockwellNot documented77 Shore D (Prusa Polymers method)[4]
Creep resistance / sustained load1–5Excellent — holds load for years. Antero 800NA still holds 82 % of its room-temperature ZX tensile strength at 104 °C and 63 % at 132 °C (printed, ASTM D638)[2]Below average — a 12 mm bar sagged to 16.4 mm over 5 days at 1.25 kg, less than plain PETG's 19.4[21]
Fatigue / repeated-flex resistance1–5Not documentedModerate — no CF-grade S-N curve; unfilled printed PETG ran 79 000–193 000 cycles at 30 % of tensile strength[28]
Elasticity / flexibility1–5Rigid[1]Rigid[3]
Z strength as % of XY%56-82 (Antero 800NA and 840CN03 printed on the F900 and Fortus 450mc, ZX against XZ tensile yield and break, ASTM D638)[2][27]83 (Bambu Lab, printed Z against XY tensile)[3]
Thermal Properties
HDT at 0.45 MPa°C158 (printed XY and ZX, ASTM D648 Method B at 66 psi, Antero 800NA); 285 for CarbonX PEKK-A CF15 (ISO 75 at 0.45 MPa)[2][1]74 (Bambu Lab) and 96 (Prusament), ISO 75 at 0.45 MPa[3][4]
HDT at 1.8 MPa°C156-157 (printed, ASTM D648 Method B at 264 psi, Antero 800NA); moulded 147[2]68 (Bambu Lab) and 80 (Prusament), ISO 75 at 1.8 MPa[3][4]
Glass transition (Tg)°C156 (ASTM D7426, Antero 800NA); 165 for CarbonX PEKK-A CF15 (DSC)[2][1]68 (Bambu Lab) and 80 (3DXTech), DSC[3][5]
Melting point / Vicat°C300 melt point (ASTM D7426 peak heat, Antero 800NA); 305 for CarbonX PEKK-A CF15 (DSC)[2][1]225 melting (Bambu Lab, DSC) — the carbon fibre lets the PET fraction crystallise[3]
Continuous service temperature°CNot documented77 — loaded bars begin to move at this temperature, against 61 for Bambu Lab PETG Basic[21]
Thermal expansion (CTE)µm/m·K36.1 in XY and 50.2 in ZX (printed, 40-140 °C, ASTM E831, Antero 800NA); 47.4 and 51.2 for the ESD grade Antero 840CN03[2][27]Not documented
Flammability / UL 94Not documentedFlammable; no UL 94 rating published[3]
Environment & Chemical
UV resistance1–5Good — years with some colour shift. 1000 h of QUV cycling to ASTM G154 left Antero 800NA's yield strength unchanged at 57 MPa and raised stress at break 3.6 %[2]Moderate — a season or two; the carbon fibre does not add UV stabilisation[29]
Chemical resistanceNot documentedWithstands acids, alkalis, oils and UV exposure, as for unfilled PETG[29]
Food contactNot documentedNot certified for food contact[29]
Biodegradability / compostabilityNot documentedNot biodegradable[29]
RecyclabilityNot documentedFibre-filled PETG is not accepted in household plastic collection[29]
Electrical & ESD propertiesUnfilled PEKK is an insulator at above 1.4e14 ohm-cm (ASTM D257); CarbonX PEKK-A CF15 sits above 10^7 ohm/sq, and the Antero 840CN03 ESD grade is specified at 10^4-10^9 ohm-cm[2][1][27]Surface resistance above 10⁹ ohm/sq — carbon fibre at this loading is not static-dissipative (3DXTech)[5]
Health & Safety
Fume toxicity1–5Moderate — measurable VOCs and UFPs, ventilation advised. None of these polymers was in the chamber study, and all are processed far above the temperatures it covered[30]Moderate — measurable VOCs and UFPs, ventilation advised[30]
Ventilation / filtration requirement1–5Ventilated room or enclosure recommended[30]Open a window / occasional ventilation[30]
Dust & fibre handling hazardCarbon fibre is bound in the matrix; sanding dust should not be inhaled[1]Carbon fibre is bound in the matrix; sanding dust should not be inhaled[5]
Post-Processing
Sanding & machiningNot documentedSands to a matte finish more readily than unfilled PETG[22]
Gluing & solvent weldingNot documentedCyanoacrylate; no common solvent welds it[22]
Vapour / chemical smoothingNot documentedNo practical vapour smoothing[22]
Support material pairingNot documentedSupport for PLA or its own material (Bambu Lab)[3]
Dimensional accuracy & detailNot documentedMatte finish hides layer lines; stringing is reduced against unfilled PETG[3]
Solvents & Solubility
Soluble inConcentrated sulphuric acid, as for PEEK; no common organic solvent touches a polyaryletherketone.[31][32]No common workshop solvent; dichloromethane — a carcinogen — dissolves the matrix surface, 1,2-dichloroethane destroys it in a week.[33][34]
Softened or crazed byConcentrated sulphuric acid and liquid Freon are the entries Ensinger marks not resistant; acetone, MEK and toluene do nothing.[31]Acetone (+16 % weight over 1 year at 23 °C), ethyl acetate, toluene and DMF swell and soften it; methanol crazes it.[33]
Solvent welding & smoothing agentNone — no solvent softens a polyaryletherketone.[31]Dichloromethane reaches only the resin, so the fibre is left standing proud of the surface. Controlled carcinogen.[34]

Material entries describe families or representative grades, not an interchangeable specification for every spool. Test methods, orientations and conditions may differ. Unknown values are marked “Not documented”. Prices and source dates remain historical snapshots; check the linked guide for product details. Differences highlight text, not a universal winner.

Sources for this comparison

  1. CarbonX Carbon Fiber PEKK-A CF15 Technical Data Sheet v1 3DXTech · 2026-08 · tds
  2. Antero 800NA — FDM Material Data Sheet (PEKK-based) Stratasys · 2025-08 · tds
  3. Bambu Filament Technical Data Sheet — PETG-CF Bambu Lab · 2026-08 · tds
  4. Prusament PETG Carbon Fiber Technical Datasheet Prusa Polymers · 2026-08 · tds
  5. CarbonX Carbon Fiber PETG Technical Data Sheet 3DXTech · 2026-08 · tds
  6. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  7. 3D4Makers product catalogue 3D4Makers · 2026-08 · vendor
  8. Kimya PEKK-A Natural 1.75 mm 500 g igo3d · 2026-08 · vendor
  9. Printed Solid product catalogue Printed Solid · 2026-08 · vendor
  10. SUNLU PETG-CF (PETG Carbon Fiber) 3D Printer Filament 1 kg SUNLU · 2026-08 · vendor
  11. Fibreheart PETG-CF Pro Filament product page Siraya Tech · 2026-08 · vendor
  12. IEMAI CF-PETG 3D Printing Filament product page IEMAI 3D · 2026-08 · vendor
  13. Reli3D Carbon Fiber PETG Filament 1.75 mm, 1 kg Reli3D (Amazon US) · 2026-08 · vendor
  14. PET-G CF15 Sakata 3D Filaments · 2026-08 · vendor
  15. Filament PM CFJet technical data sheet (TDS CFJet ENG.pdf) Filament PM (Plasty Mladec) · 2026-08 · tds
  16. Kimya PEKK Carbon Grey 1.75 mm 500 g igo3d · 2026-08 · vendor
  17. IEMAI 3D PEKK 3D Printing Filament — store page IEMAI 3D · 2026-08 · vendor
  18. ELEGOO product catalogue ELEGOO · 2026-08 · vendor
  19. Prusament PEI 1010 Technical Datasheet v1.0 Prusa Polymers · 2024-09 · tds
  20. Prusament PEI 1010 — material page Prusa Polymers · 2026-08 · doc
  21. BambuLab PETG Basic vs Translucent vs PETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  22. PET and PETG — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  23. THERMAX PEKK-A — product page (print recommendations) 3DXTech · 2026-08 · doc
  24. CARBONX PETG+CF — product page (print recommendations) 3DXTech · 2026-08 · doc
  25. Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
  26. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  27. Antero 840CN03 — FDM Material Data Sheet (PEKK, ESD) Stratasys · 2024-08 · tds
  28. Mechanical Properties of Additively Manufactured Polymeric Materials — PLA and PETG — For Biomechanical Applications Polymers 16(13):1868 · 2024-06 · paper
  29. PETG — material basics Polymaker Wiki · 2026-08 · doc
  30. Emissions of Ultrafine Particles and Volatile Organic Compounds from Commercially Available Desktop Three-Dimensional Printers with Multiple Filaments (Azimi et al.) Environmental Science & Technology 50(3) 1260-1268 · 2016-01 · paper
  31. Chemical resistance — resistance of Ensinger plastics to chemicals (DIN 50 014, 23/50) Ensinger · 2026-08 · tds
  32. The Effects of Sulfonated Poly(ether ether ketone) Ion Exchange Preparation Conditions on Membrane Properties Yee, Zhang & Ladewig, Membranes 3(3) 182–195 · 2013-07 · paper
  33. Eastman Spectar copolyester — Chemical resistance (unstressed bars, 1 year at 23 °C) Eastman Chemical Company · 2026-08 · tds
  34. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc