3D Printing Info

Filament comparison

PA6-CF vs PETG

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

Carbon-fibre PA6 (PA6-CF) guidePETG guide

2 selected · all documented properties

Open these two in the interactive comparisonMore PA6-CF comparisonsMore PETG comparisons
PA6-CF vs PETG — documented properties and sources
PropertyCarbon-fibre PA6 (PA6-CF)PAPETGPETG
Market snapshot
Listing priceUSD/kg; dated snapshots$62.48/kg median; $39.00–$133.32/kg across 6 dated product listings$19.99/kg median; $8.99–$69.99/kg across 21 dated product listings
Identity & Market
Base polymer / chemistryPA6 reinforced with chopped carbon fibre — Polymaker's grade is 20 wt%[1][2]Polyethylene terephthalate glycol copolymer — PET with a glycol comonomer that suppresses crystallisation[3][4]
Densityg/cm³1.09 (Bambu Lab), 1.17 (Polymaker Fiberon and 3DXTech), ISO 1183[2][1][5]1.24–1.30 (ISO 1183)[3][4][6][7]
Typical priceUSD/kg1 kg-equivalent spools span 39–133; the middle of the market is about 80[2][8][9][10]1 kg spools cluster near 20[11][8][12]
Price range across brandsUSD/kg39–133 across brands; IEMAI 3D 39, Bambu Lab 43, YXPOLYER 45, Polymaker Fiberon 80, 3DXTech CarbonX 83, Obsidian 133[2][8][12][13][9][10]12–70 across brands; IEMAI 12, ELEGOO 14, CHCKX 14, Bambu Lab 18–20, Hatchbox 26, Prusament 38, Prusament PETG V0 70[11][8][14][12][15][16]
Market availability1–5Stocked by most mainstream brands[2][8][13][12][9][10]Ubiquitous, every brand and retailer[11][8][17][12]
Spool sizes & diameters1.75 and 2.85 mm; 0.5, 0.75, 1 and 2 kg spools[8][13][2]1.75 and 2.85 mm; 0.75, 0.8 and 1 kg spools plus spool-less refills[8][12]
Typical applicationsLoad-bearing brackets, tooling and drone frames that must hold strength above 150 °C[2][1]Functional parts, enclosures and outdoor fittings that need more toughness and heat tolerance than PLA[3][4]
Diameter tolerance± mmNot documented±0.02 (Prusament)[3]
Printing Parameters
Nozzle temperature°C260–290 (Bambu Lab); 280–300 (Polymaker Fiberon)[2][1]230–260 across brands; Prusament 250 ± 10, Polymaker 240–260[3][4][7]
Bed temperature°C40–50 (Polymaker Fiberon)[1]60–90; Prusament 80 ± 10, Polymaker 60–70[3][7]
Enclosure / chamber requirement1–5Enclosure required (passive) — Bambu Lab specifies a 45–60 °C chamber, Polymaker room temperature[2][1]Open frame is fine[7]
Recommended chamber temperature°C45–60 (Bambu Lab); room temperature (Polymaker Fiberon)[2][1]Not documented
Part cooling fanNot documentedAround 50 %; Polymaker specifies 20–60 %, less than PLA to protect layer bonding[3][7]
Bed surface & adhesion aidEngineering or high-temperature plate with glue (Bambu Lab)[2]Textured PEI, satin or powder-coated sheets. On smooth PEI a glue stick is used as a release agent, not an adhesive — PETG bonds to bare PEI hard enough to tear the sheet[3][7]
Maximum volumetric flow (mm³/s; see test conditions)mm³/s8 at Bambu Lab's 100 mm/s cap on a 0.4 mm nozzle at 0.2 mm layer; Polymaker rates its grade to 300 mm/s[2][1][18]8–15 (PrusaSlicer guidance); My Tech Fun ran Bambu Lab PETG Basic at 13 mm³/s[18][19]
Warping tendency1–5Not documentedSlight — corner lift on large flat parts[3][7]
Bed-adhesion difficulty1–5Needs a specific surface plus adhesive[2]Needs the right surface or a thin adhesive — the problem is releasing the part, not sticking it[3]
Stringing / oozing tendency1–5Moderate — retraction tuning needed[20]Moderate — retraction tuning needed[3][7]
Overall printing difficulty1–5Expert / industrial hardware only — enclosure, hardened nozzle, an 80 °C dry and a printer that can hold the filament dry throughout[2][1][21]Easy — minor profile tuning[7]
Extruder requirement0.6 mm nozzle recommended by Bambu Lab; 0.4 and 0.8 also supported[2]Not documented
Hardware Wear & Reliability
Nozzle hardness required1–4Hardened steel required — Polymaker measures brass nozzle life at about 9 h on PA6-CF20 and recommends hardened steel or ruby[1]Brass fine indefinitely[18]
Abrasiveness1–5Highly abrasive — standard CF composite; Polymaker puts brass nozzle life at roughly 9 h[1]Non-abrasive[7]
Nozzle clog risk1–5Very high — frequent jams without careful setup; the combination of moisture and fibre is the worst case in the dataset[21][1]Low — no special hot-end required and clogging is not among the listed drawbacks; Prusa lists no drybox and no hardened nozzle[22][23]
Heat-creep / jam sensitivity1–5Moderate — good heatbreak cooling needed[24]Slightly sensitive[22]
Hotend requirementHardened steel or ruby nozzle plus an all-metal hot end rated to 300 °C[1][2]No special hot-end required[22]
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Very high (>2 %) — 2.35 % saturated at 25 °C / 55 % RH (Bambu Lab)[2]Moderate (0.3–0.8 %) — Bambu Lab reports 0.40 % saturated at 25 °C / 55 % RH; Prusa measures only 0.07 % in 24 h and 0.10 % in 7 days at the drier 22 % RH[3][25]
Equilibrium moisture content at ~50 % RH%2.35 saturated at 25 °C / 55 % RH (Bambu Lab)[2]0.10 after 7 days at 24 °C / 22 % RH (Prusa Polymers); 0.40 saturated at 25 °C / 55 % RH (Bambu Lab)[3][25]
Drying temperature & time80 °C for 8–12 h (Bambu Lab); 100 °C for 10 h (Polymaker Fiberon)[2][1]60–65 °C for 6–8 h[7][25]
Symptoms when wetPopping and cracking during extrusion, then hard-to-diagnose defects[26]Bubbling and popping at the nozzle, stringing and a rough surface[3]
Effect of moisture on strengthPolymaker publishes dry and wet printed blocks for PA6-CF20 itself: at 5.30 % moisture tensile falls 109.3 → 54.7 MPa and modulus 8636 → 2508 MPa, while notched Charpy rises 11.0 → 35.6 kJ/m². Fibre reinforcement reduces but does not remove the effect[1][26]Polymaker groups PETG with nylon, PVA and TPU as highly hygroscopic and shows a before-and-after-drying comparison; the loss appears as poor layer adhesion and weak, brittle layers rather than a published dry-versus-conditioned figure[21]
Storage requirementSealed below 20 % RH with desiccant; often needs to stay in a dryer while printing[21]Sealed with desiccant; Polymaker groups PETG with the highly hygroscopic materials[21][27]
Hydrolysis at melt temperaturePolymaker specifies an 80–100 °C dry and storage below 20 % RH; no molecular-weight loss figure is published, and the wet data it does publish is conditioning rather than melt hydrolysis[1][28]Not documented
Mechanical Properties
Tensile strength (XY)MPa102 ± 7 (Bambu Lab) and 109.3 ± 2.4 (Polymaker Fiberon, dry/annealed) printed XY, ISO 527; the Fiberon grade falls to 54.7 ± 1.1 conditioned to 5.30 % moisture; 3DXTech quotes 63 at break[2][1][5]38–51 (printed XY, ISO 527); Prusament 47 ± 2 at yield; 62 on My Tech Fun 4×4 mm bars[3][4][6][29]
Young's modulusMPa4430 ± 310 (Bambu Lab) and 8636 ± 211 (Polymaker Fiberon, dry/annealed) printed XY, ISO 527; Fiberon falls to 2508 ± 83 conditioned; 3DXTech quotes 3800[2][1][5]1500–2311 (printed XY, ISO 527)[3][4][6][7]
Elongation at break%5.8 ± 1.6 printed XY, ISO 527 (Bambu Lab); 3DXTech quotes 3 at break[2][5]5.2–9.3 at break (printed XY, ISO 527); Prusament 5.1 at yield[4][6][7][3]
Flexural strengthMPa161.0 ± 3.9 printed XY dry, 64.9 ± 4.9 conditioned, ISO 178 (Polymaker Fiberon); 3DXTech quotes 84[1][5]58–80 (printed XY, ISO 178); Prusament 66 ± 2[3][4][6][7]
Flexural modulusMPa7038 ± 205 printed XY dry and 2286 ± 185 conditioned, ISO 178 (Polymaker Fiberon); 3DXTech quotes 3750[1][5]1068–2277 (printed XY, ISO 178)[3][4][6][7]
Charpy impact, notchedkJ/m²11.0 ± 0.3 printed XY dry and 35.6 ± 1.2 conditioned, ISO 179 notched (Polymaker Fiberon)[1]2.6 (PolyLite) to 11.6 (PolyMax) printed XY, ISO 179, notched; Prusament 6 ± 1[4][6][3]
Other impact dataCharpy unnotched 24.0 ± 1.0 printed XY dry and 73.0 ± 2.0 conditioned, 7.5 ± 2.7 printed Z dry (Polymaker Fiberon); Bambu Lab 40.3 ± 2.5 unnotched, 13.4 ± 1.7 notched[1][2]Charpy unnotched does not break on Prusa's 4 J pendulum (ISO 179-1); Izod 3.37 kJ/m² on My Tech Fun printed bars[3][29]
Layer adhesion / Z tensileMPa48 ± 6 (Bambu Lab) and 54.0 ± 5.2 (Polymaker Fiberon, dry) printed Z, ISO 527; Fiberon falls to 25.5 ± 1.2 conditioned[2][1]18 ± 4 (Prusa interlayer adhesion test); 42.8 printed Z for PolyLite PETG; 33 on My Tech Fun bars[3][4][29]
Brittleness1–5Moderate[2][1]Moderate[3][4]
Hardness (scale-specific)Shore A / Shore D / RockwellRockwell M88 / R117 on extruded PA66-GF30 stock (ASTM D785); no figure is published for a carbon-fibre nylon filament[30]74 Shore D (Prusa Polymers method); measured on printed bars at 68.2 for Extrudr PETG, 72 for Fiberlogy PETG and 72.8 for Prusament PETG[3][29][31][32]
Creep resistance / sustained load1–5Good. Ensinger rates its PA66-CF30 injection-moulding compound for exceptional performance under both static and dynamic loading with 110 °C continuous service; in a printed part the fibre restrains the matrix, but conditioning to equilibrium moisture still softens it[33][26]Below average — a 12 mm bar sagged to 18.2 mm (Fiberlogy) and 19.4 mm (Bambu Lab Basic) over 5 days at 1.25 kg[29][19]
Fatigue / repeated-flex resistance1–5Good. Ensinger states its PA66-CF30 compound has improved fatigue strength in tension, flexure and compression against unfilled and glass-filled PA66[33]Moderate — 79 000–193 000 cycles at 30 % of tensile strength, about three times printed PLA (R = 0.2, 7 Hz)[34]
Elasticity / flexibility1–5Rigid[2]Slightly flexible in thin sections[3]
Z strength as % of XY%47 (Bambu Lab) to 49 (Polymaker Fiberon), printed[2][1]84 (PolyLite, printed Z against XY tensile)[4]
Thermal Properties
HDT at 0.45 MPa°C186 (Bambu Lab) and 215 (Polymaker Fiberon), ISO 75 at 0.45 MPa[2][1]68 (Prusament) to 78 (PolyLite), ISO 75 at 0.45 MPa[3][4][7]
HDT at 1.8 MPa°C164 (Bambu Lab) and 173 (Polymaker Fiberon), ISO 75 at 1.8 MPa[2][1]65 (Polymaker) to 75 (PolyLite), ISO 75 at 1.8 MPa; Prusament 68[3][4][7]
Glass transition (Tg)°C68 (Bambu Lab) to 74.2 (Polymaker Fiberon), DSC; 3DXTech quotes 70[2][1][5]71–81 (DSC)[4][6][7]
Melting point / Vicat°C223 melting (Bambu Lab, DSC); Vicat 212 (ISO 306)[2]Amorphous — no melting point; Vicat 75–84 (ISO 306)[4][6][7]
Continuous service temperature°CBounded by heat deflection of 164–173 °C at 1.8 MPa; no loaded-bar service figure is published[2][1]61–66 — loaded bars begin to move at this temperature across six grades from four brands; Prusa publishes 68 for Prusament PETG[29][31][32][19][35]
Annealing response100 °C for 16 h (Polymaker Fiberon)[1]Not documented
Thermal expansion (CTE)µm/m·K94 in the XY direction and 180 in Z, measured on XY-built specimens (79 and 148 on XZ/ZX-built specimens), room temperature to 60 °C, ASTM E831. From Stratasys FDM Nylon-CF10, a blended-nylon matrix with 10 wt% carbon fibre — the closest published printed CTE for a carbon-fibre nylon[36]65 at 30 °C (neat PETG, large-format printed bead, TMA)[37]
Flammability / UL 94Flammable; no UL 94 rating published[1]Flammable; no UL 94 rating published for standard PETG, though flame-retardant V0 grades exist[38][27]
Environment & Chemical
UV resistance1–5Months outdoors before embrittlement — unstabilised polyamide yellows and chalks under UV[20]Moderate — a season or two[3]
Chemical resistanceWithstands oils, fuels and alkalis[20]Withstands acids, alkalis, oils and UV exposure — Polymaker names outdoor use as a result[27]
Water / humidity resistance in service1–5Absorbs water, properties shift[26]Good — minor absorption[3]
Food contactNot food-contact certified[20]PET is the polymer of drinks bottles, but printed layer grooves harbour bacteria and no filament here carries a food-contact certification[27]
Biodegradability / compostabilityNot biodegradable[20]Not biodegradable[27]
RecyclabilityFibre-filled polyamide is not accepted in household plastic collection[20]PET is widely recycled as bottle stock, but printed PETG waste is not accepted in household collection[27]
Electrical & ESD propertiesSurface resistance above 10⁹ ohm/sq — not static-dissipative (3DXTech, ASTM D257)[5]Not documented
Health & Safety
Fume toxicity1–5Moderate — measurable VOCs and UFPs, ventilation advised[39]Moderate — measurable VOCs and UFPs, ventilation advised[39]
VOC emission rateµg/minUp to 180 caprolactam, the dominant VOC from nylon and the largest single-VOC rate in the study[39]Not documented
Ultrafine-particle emission rateparticles/min≈2 × 10⁸ median for nylon — low for particles despite the highest VOC mass measured[39]≈5 × 10⁹ median for the PET-based T-Glase filament in the same chamber study, against ≈1 × 10⁸ for PLA[39]
Hazardous species emittedCaprolactam, at up to 180 µg/min from nylon filament[39]Not documented
Ventilation / filtration requirement1–5Ventilated room or enclosure recommended[39]Open a window / occasional ventilation[39]
Dust & fibre handling hazardFibre is bound in the matrix; sanding dust should not be inhaled[1]Not documented
Post-Processing
Sanding & machiningSands to a matte finish; the fibre makes it cut more cleanly than unfilled nylon[24]Sands poorly — the material is tough and gums rather than powders[22]
Painting & finishingNot documentedPaint adheres poorly without abrasion and a primer[3]
Gluing & solvent weldingCyanoacrylate; no common solvent welds polyamide[24]Cyanoacrylate; no common solvent welds PETG cleanly[22]
Vapour / chemical smoothingNo practical vapour smoothing[24]No practical vapour smoothing[3]
Support material pairingPolyDissolve S1 (Polymaker Fiberon)[1]Prints its own supports; Polymaker rates PolyDissolve S1 for PETG[22]
Dimensional accuracy & detailConditioned parts grow; Polymaker declines to publish a standard dimensional allowance because it depends on geometry and infill[26]Stringing and blobbing are the usual accuracy limits, not shrinkage[3][7]
Solvents & Solubility
Soluble inFormic acid, phenol, m-cresol and hexafluoroisopropanol dissolve the matrix at 23 °C, leaving the fibre; laboratory reagents.[40]No common workshop solvent; 1,2-dichloroethane destroys it inside a week and dichloromethane — a carcinogen — dissolves the surface.[41][42]
Softened or crazed byZinc chloride solutions stress-crack the nylon matrix, alcoholic calcium chloride dissolves it, mineral acids attack it.[40]Acetone (+16 % weight over 1 year at 23 °C), ethyl acetate, toluene and DMF swell and soften it; methanol crazes it.[41]
Solvent welding & smoothing agentNone — nylon's only solvents (formic acid, phenol, HFIP) degrade the part, and the fibre blocks surface flow anyway.[40]Dichloromethane brushed on is the only agent that smooths PETG — a controlled carcinogen, not workshop stock.[42]

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. Fiberon PA6-CF20 Technical Data Sheet V1.1 Polymaker · 2024-12 · tds
  2. Bambu Filament Technical Data Sheet — PA6-CF Bambu Lab · 2026-08 · tds
  3. Prusament PETG Technical Datasheet v1.1 Prusa Polymers · 2022-02 · tds
  4. PolyLite PETG Technical Data Sheet Polymaker Wiki · 2026-08 · tds
  5. CarbonX Carbon Fiber Nylon (Gen3) Technical Data Sheet v3.0 3DXTech · 2026-08 · tds
  6. PolyMax PETG Technical Data Sheet Polymaker Wiki · 2026-08 · tds
  7. Polymaker PETG Technical Data Sheet Polymaker Wiki · 2026-08 · tds
  8. Polymaker product catalogue Polymaker · 2026-08 · vendor
  9. YXPOLYER PA6 CF-Black 1 kg — product page YXPOLYER · 2026-08 · vendor
  10. IEMAI 3D CF-PA6 3D Printing Filament — store page IEMAI 3D · 2026-08 · vendor
  11. PETG Basic — product page Bambu Lab US Store · 2026-08 · vendor
  12. Printed Solid product catalogue Printed Solid · 2026-08 · vendor
  13. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  14. Black PETG Filament 1.75 mm 1 kg — product data Hatchbox · 2026-08 · vendor
  15. IEMAI PETG 3D Printing Filament product page IEMAI 3D · 2026-08 · vendor
  16. CHCKX PETG 3D Printer Filament 1.75 mm 1 kg, Black CHCKX (Amazon US) · 2026-08 · vendor
  17. ELEGOO product catalogue ELEGOO · 2026-08 · vendor
  18. Max volumetric speed Prusa Knowledge Base · 2026-08 · doc
  19. BambuLab PETG Basic vs Translucent vs PETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  20. PA (Nylon) — material basics Polymaker Wiki · 2026-08 · doc
  21. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  22. PET and PETG — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  23. Filament Material Guide Prusa Knowledge Base · 2026-08 · doc
  24. Nylon — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  25. Bambu Filament Technical Data Sheet — PETG HF Bambu Lab · 2026-08 · tds
  26. Moisture Conditioning — effect on printed nylon properties Polymaker Wiki · 2026-08 · doc
  27. PETG — material basics Polymaker Wiki · 2026-08 · doc
  28. PolyMide CoPA Technical Data Sheet V5.4 (dry and wet status blocks) Polymaker · 2024-11 · tds
  29. PCTG vs PETG comparison — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  30. TECAMID 66 GF30 black (PA66-GF30) — stock shape properties Ensinger · 2026-08 · tds
  31. Extrudr PETG vs PCTG vs XPETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  32. Prusament PETG-CF vs PETG V0 vs PETG — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  33. TECACOMP PA66 CF30 black — injection-moulding compound Ensinger · 2026-08 · tds
  34. Mechanical Properties of Additively Manufactured Polymeric Materials — PLA and PETG — For Biomechanical Applications Polymers 16(13):1868 · 2024-06 · paper
  35. Prusament PETG — material page Prusa Polymers · 2026-08 · doc
  36. FDM Nylon-CF10 — Material Data Sheet (blended nylon, 10 wt% carbon fibre) Stratasys · 2026-08 · tds
  37. Effects of Fiber Orientation on the Coefficient of Thermal Expansion of Fiber-Filled Polymer Systems in Large Format Polymer Extrusion-Based Additive Manufacturing Materials 15(8):2764 · 2022-04 · paper
  38. Prusament PETG V0 Technical Datasheet Prusa Polymers · 2026-08 · tds
  39. 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
  40. Ultramid Nylon Chemical Resistance guide (unmodified PA6 B27E and PA66 A27E) BASF · 2026-08 · tds
  41. Eastman Spectar copolyester — Chemical resistance (unstressed bars, 1 year at 23 °C) Eastman Chemical Company · 2026-08 · tds
  42. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc