3D Printing Info

Filament comparison

ASA vs PETG-CF

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

ASA guideCarbon-fibre PETG (PETG-CF) guide

2 selected · all documented properties

Open these two in the interactive comparisonMore ASA comparisonsMore PETG-CF comparisons
ASA vs PETG-CF — documented properties and sources
PropertyASAASACarbon-fibre PETG (PETG-CF)PETG
Market snapshot
Listing priceUSD/kg; dated snapshots$28.98/kg median; $17.99–$50.00/kg across 14 dated product listings$29.99/kg median; $16.00–$74.22/kg across 11 dated product listings
Identity & Market
Base polymer / chemistryAcrylonitrile styrene acrylate — ABS with the butadiene rubber phase replaced by an acrylate rubber that has no UV-vulnerable double bonds[1][2]PETG reinforced with chopped carbon fibre[3][4]
Densityg/cm³1.05 (Bambu Lab) to 1.13 (PolyLite ASA), ISO 1183; Prusament 1.07[5][6][2]1.25 (Bambu Lab) to 1.34 (3DXTech), ISO 1183; Prusament 1.27[3][7][4]
Typical priceUSD/kg1 kg spools cluster near 30[8][9][10]1 kg-equivalent spools span 16–74; the middle of the market is about 29[3][10][11][12][13][14][15][16]
Price range across brandsUSD/kg18–50 across brands; IEMAI 18, SUNLU 18, Ambrosia 23, Polymaker 26, Bambu Lab 30, YXPOLYER 30, Prusament 41, 3DXTech 50[17][9][8][18][10][19][20][21][22]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[23][3][19][10][11][12][13][14][15][16]
Market availability1–5Stocked by most mainstream brands[8][9][19][10]Stocked by most mainstream brands[3][19][10][23]
Spool sizes & diameters1.75 and 2.85 mm; 0.8, 1, 4 and 10 kg spools[19][10][8]1.75 and 2.85 mm; 0.75 and 1 kg spools[19][3]
Typical applicationsOutdoor fittings, signage, automotive exterior trim and anything that has to hold colour and strength in sunlight[24][1]Stiff functional parts and fixtures where PETG's toughness is traded for rigidity and a matte finish[3][4]
Diameter tolerance± mm±0.04 (Prusament)[2]±0.02 (Prusament)[4]
Printing Parameters
Nozzle temperature°C230–270 across brands; Prusament 260 ± 10, Bambu Lab 240–270, PolyLite 230–260[5][6][2]240–270 (Bambu Lab); 265 ± 10 (Prusament)[3][4]
Bed temperature°C75–110; Prusament 110 ± 5, Bambu Lab 80–100, PolyLite 75–95[5][6][2]65–75 (Bambu Lab); 90 ± 10 (Prusament)[3][4]
Enclosure / chamber requirement1–5Enclosure recommended — Polymaker calls a chamber needed at ambient temperature, Bambu Lab requires an enclosed printer and rules out its P1P and A-series machines[6][25]Open frame fine; draught shield helps — Bambu Lab specifies a 35–50 °C chamber[3]
Recommended chamber temperature°C45–60 (Bambu Lab)[5]35–50 (Bambu Lab)[3]
Part cooling fanLow — Prusament 30 % within a 0–50 % range, Bambu Lab 0–80 %, PolyLite off[2][5][6]0–60 % (Bambu Lab); 50 % (Prusament)[3][4]
Bed surface & adhesion aidSatin, smooth PEI or powder-coated sheet with a glue stick; Prusa advises a 3 mm or taller brim on large parts[2][25]Textured PEI or engineering plate with glue (Bambu Lab)[3]
Maximum volumetric flow (mm³/s; see test conditions)mm³/s10–16 (PrusaSlicer guidance for ABS/ASA)[26]11.5 on My Tech Fun's Bambu Lab PETG-CF profile[27]
Warping tendency1–5High — enclosure needed for reliable large parts; Prusa recommends a tall brim and Bambu Lab attributes cracking to cooling stress exceeding interlayer adhesion[2][25]Not documented
Bed-adhesion difficulty1–5Needs a specific surface plus adhesive[2][25]Needs the right surface or a thin adhesive[3]
Stringing / oozing tendency1–5Slight[6]Slight — the fibre reduces stringing against unfilled PETG[3][28]
Overall printing difficulty1–5Intermediate — dry filament and a tuned profile[25][2]Intermediate — dry filament and a tuned profile; hardened nozzle mandatory[3]
Hardware Wear & Reliability
Nozzle hardness required1–4Brass fine indefinitely[25]Hardened steel required[3]
Abrasiveness1–5Non-abrasive[25]Highly abrasive — standard CF composite[3]
Nozzle clog risk1–5Low — no special hot-end required and clogging is not among the listed drawbacks; Prusa lists no drybox and no hardened nozzle[29][30]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[31][32]
Heat-creep / jam sensitivity1–5Slightly sensitive[29]Slightly sensitive[28]
Hotend requirementNo special hot-end required[29]Hardened steel nozzle; no high-temperature hot-end needed[3][28]
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Moderate — 0.45 % saturated at 25 °C / 55 % RH (Bambu Lab) and 0.40 % equilibrium (Polymaker); Prusa measures only 0.17 % after 7 days at 22 % RH[5][6][2]Low — 0.30 % saturated at 25 °C / 55 % RH (Bambu Lab)[3]
Equilibrium moisture content at ~50 % RH%0.45 saturated at 25 °C / 55 % RH (Bambu Lab); 0.40 equilibrium (Polymaker); 0.17 after 7 days at 24 °C / 22 % RH (Prusa)[5][6][2]0.30 saturated at 25 °C / 55 % RH (Bambu Lab); Prusa measures 0.10 after 7 days at 22 % RH[3][4]
Drying temperature & time80 °C for 8 h (Bambu Lab); 70 °C for 7 h (Polymaker)[5][6]65 °C for 8 h (Bambu Lab)[3]
Symptoms when wetBubbling and popping at the nozzle, stringing, rough surface and weak layers[33]Bubbling and popping at the nozzle, stringing and a rough surface[33]
Effect of moisture on strengthNo dry-versus-conditioned figures are published for ASA; Polymaker groups the styrenics as moderate-sensitivity and the loss shows as poor layer adhesion rather than a stated strength delta[33]No dry-versus-conditioned figures published; Bambu Lab states PETG-CF must be properly dried before printing and stored dry after use[3][33]
Storage requirementSealed with desiccant; Polymaker rates the styrenics moderate-sensitivity[33]Sealed with desiccant; Bambu Lab says store dry after use[3][33]
Mechanical Properties
Tensile strength (XY)MPa37 ± 3 (Bambu Lab) to 43.8 (PolyLite) printed XY, ISO 527; Prusament 42 ± 1 at yield; Formfutura quotes 47.5 at yield[5][6][2][34]35 ± 5 (Bambu Lab) and 47 ± 2 at yield (Prusament) printed XY, ISO 527; 56 at break for 3DXTech[3][4][7]
Young's modulusMPa2379 (PolyLite) to 2450 (Bambu Lab) printed XY, ISO 527; Prusament 1600, Formfutura 2020[5][6][2][34]2460 ± 230 (Bambu Lab) and 1700 (Prusament) printed XY, ISO 527[3][4]
Elongation at break%6.7 (PolyLite) to 9.2 (Bambu Lab) at break, printed XY, ISO 527; Formfutura quotes 15 at break, Prusament 3.4 at yield[5][6][34][2]4.3 at yield (Prusament, printed XY, ISO 527); 3 at break for 3DXTech[4][7]
Flexural strengthMPa64 ± 1 printed horizontal (Prusament, ISO 178); Bambu Lab 65 ± 5, PolyLite 73.4[2][5][6]68 ± 3 printed horizontal, ISO 178 (Prusament)[4]
Flexural modulusMPa1920 ± 130 (Bambu Lab) to 3206 (PolyLite) printed XY, ISO 178; Prusament 2000[5][6][2]2300 printed horizontal, 3100 printed vertical, ISO 178 (Prusament)[4]
Charpy impact, notchedkJ/m²10.3 (PolyLite) to 19.6 (Bambu Lab) printed XY, ISO 179, notched; Prusament 12 ± 1, Formfutura 18[6][5][2][34]Not documented
Other impact dataCharpy unnotched 25 ± 3 printed horizontal and 38 ± 11 printed vertical (Prusament, ISO 179-1); Bambu Lab 41.0 ± 2.3 printed XY[2][5]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][27]
Layer adhesion / Z tensileMPa11 ± 1 (Prusa interlayer adhesion test); 31 ± 4 (Bambu Lab) and 32 (PolyLite) printed Z tensile, ISO 527[2][5][6]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][27]
Brittleness1–5Tough — absorbs impact, yields before breaking[5][2]Brittle — snaps with little warning[7]
Hardness (scale-specific)Shore A / Shore D / Rockwell78 Shore D (Prusa Polymers method)[2]77 Shore D (Prusa Polymers method)[4]
Creep resistance / sustained load1–5Moderate — no printed-ASA creep test found; Tg of 98 °C keeps room-temperature service far below softening, unlike PLA[6][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[27]
Fatigue / repeated-flex resistance1–5Moderate — fatigue limit at 25 % of tensile strength (8 MPa) on printed specimens, the best of the four polymers in that study[35]Moderate — no CF-grade S-N curve; unfilled printed PETG ran 79 000–193 000 cycles at 30 % of tensile strength[36]
Elasticity / flexibility1–5Rigid[5]Rigid[3]
Z strength as % of XY%84 (Bambu Lab, printed Z against XY tensile); 73 for PolyLite ASA[5][6]83 (Bambu Lab, printed Z against XY tensile)[3]
Thermal Properties
HDT at 0.45 MPa°C93 (Prusament) to 103 (PolyLite), ISO 75 at 0.45 MPa; Bambu Lab 100[2][6][5]74 (Bambu Lab) and 96 (Prusament), ISO 75 at 0.45 MPa[3][4]
HDT at 1.8 MPa°C86 (Prusament) to 100 (PolyLite), ISO 75 at 1.8 MPa; Bambu Lab 92[2][6][5]68 (Bambu Lab) and 80 (Prusament), ISO 75 at 1.8 MPa[3][4]
Glass transition (Tg)°C98 (PolyLite, DSC)[6]68 (Bambu Lab) and 80 (3DXTech), DSC[3][7]
Melting point / Vicat°CAmorphous — no melting point; Vicat 105 (PolyLite, ISO 306)[6]225 melting (Bambu Lab, DSC) — the carbon fibre lets the PET fraction crystallise[3]
Continuous service temperature°C93 — Prusa publishes this as the temperature resistance of Prusament ASA[37]77 — loaded bars begin to move at this temperature, against 61 for Bambu Lab PETG Basic[27]
Thermal expansion (CTE)µm/m·K69 ± 17 in XY and 115 ± 24 in the build direction (printed, TMA, 40–70 °C)[38]Not documented
Flammability / UL 94Flammable; no UL 94 rating published for standard ASA[5]Flammable; no UL 94 rating published[3]
Environment & Chemical
UV resistance1–5Excellent — designed for permanent outdoor use. After 1000 h of QUV exposure to ASTM G154 Stratasys measured yield strength falling only from 30.5 to 30.3 MPa and stress at break by 3.0 %[24]Moderate — a season or two; the carbon fibre does not add UV stabilisation[39]
Outdoor durability1000 h QUV per ASTM G154, cycling 8 h at 60 °C and 4 h at 50 °C with condensation: yield 30.5 → 30.3 MPa, stress at break 30.5 → 29.5 MPa, elongation 2.8 → 2.3 %, modulus 1.82 → 1.95 GPa[24]Not documented
Chemical resistanceGood against weak acids, weak alkalis, oils and grease; dissolved by acetone[6]Withstands acids, alkalis, oils and UV exposure, as for unfilled PETG[39]
Water / humidity resistance in service1–5Good — minor absorption[5]Not documented
Food contactNot food safe[1]Not certified for food contact[39]
Biodegradability / compostabilityNot biodegradable[1]Not biodegradable[39]
RecyclabilityNot accepted in household plastic collection[1]Fibre-filled PETG is not accepted in household plastic collection[39]
Electrical & ESD propertiesNot documentedSurface resistance above 10⁹ ohm/sq — carbon fibre at this loading is not static-dissipative (3DXTech)[7]
Health & Safety
Fume toxicity1–5High — hazardous VOC such as styrene; enclosure and filtration needed[40][25]Moderate — measurable VOCs and UFPs, ventilation advised[40]
VOC emission rateµg/min12–113 styrene, the range measured across the styrenic filaments tested; ASA itself was not among them[40]Not documented
Ultrafine-particle emission rateparticles/min2 × 10¹⁰ to 9 × 10¹⁰ median for ABS, the closest styrenic tested; ASA itself was not measured[40]Not documented
Hazardous species emittedStyrene. Bambu Lab states ABS and ASA release harmful gases such as styrene at printing temperature, which can be toxic and cause dizziness or nausea. Azimi et al. measured styrene from every styrenic filament tested but did not test ASA itself[25][40]Not documented
Ventilation / filtration requirement1–5Enclosure with carbon and HEPA filtration[40][25]Open a window / occasional ventilation[40]
Dust & fibre handling hazardNot documentedCarbon fibre is bound in the matrix; sanding dust should not be inhaled[7]
Post-Processing
Sanding & machiningSands well and takes filler before painting[1]Sands to a matte finish more readily than unfilled PETG[28]
Gluing & solvent weldingSolvent-welds with acetone[6]Cyanoacrylate; no common solvent welds it[28]
Vapour / chemical smoothingAcetone vapour smoothing works — ASA dissolves in acetone[6]No practical vapour smoothing[28]
Support material pairingHIPS breaks away or dissolves in d-limonene; Bambu Lab sells a dedicated Support for ABS that also serves ASA[25]Support for PLA or its own material (Bambu Lab)[3]
Dimensional accuracy & detailWarping and cooling-stress cracking are the accuracy limits; Stratasys notes the matte finish as a deliberate aesthetic advantage[25][24]Matte finish hides layer lines; stringing is reduced against unfilled PETG[3]
Solvents & Solubility
Soluble inAcetone dissolves it (Polymaker); MEK, THF, ethyl acetate and the chlorinated solvents dissolve the styrenic backbone.[41][6]No common workshop solvent; dichloromethane — a carcinogen — dissolves the matrix surface, 1,2-dichloroethane destroys it in a week.[42][43]
Softened or crazed byLimonene attacks some grades — Prusa reports Prusament ASA Orange flaking apart as layer adhesion fails.[44]Acetone (+16 % weight over 1 year at 23 °C), ethyl acetate, toluene and DMF swell and soften it; methanol crazes it.[42]
Solvent welding & smoothing agentAcetone vapour, ~20 min at 80 °C over 5 mm of liquid (15–40 min across brands); layer adhesion up, tensile slightly down.[43]Dichloromethane reaches only the resin, so the fibre is left standing proud of the surface. Controlled carcinogen.[43]

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. ASA — material basics Polymaker Wiki · 2026-08 · doc
  2. Prusament ASA Technical Datasheet v1.1 Prusa Polymers · 2024-05 · 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. Bambu Filament Technical Data Sheet V3.0 — ASA Bambu Lab · 2026-08 · tds
  6. PolyLite ASA Technical Data Sheet Polymaker · 2024-11 · tds
  7. CarbonX Carbon Fiber PETG Technical Data Sheet 3DXTech · 2026-08 · tds
  8. ASA — product page Bambu Lab US Store · 2026-08 · vendor
  9. Polymaker product catalogue Polymaker · 2026-08 · vendor
  10. Printed Solid product catalogue Printed Solid · 2026-08 · vendor
  11. SUNLU PETG-CF (PETG Carbon Fiber) 3D Printer Filament 1 kg SUNLU · 2026-08 · vendor
  12. Fibreheart PETG-CF Pro Filament product page Siraya Tech · 2026-08 · vendor
  13. IEMAI CF-PETG 3D Printing Filament product page IEMAI 3D · 2026-08 · vendor
  14. Reli3D Carbon Fiber PETG Filament 1.75 mm, 1 kg Reli3D (Amazon US) · 2026-08 · vendor
  15. PET-G CF15 Sakata 3D Filaments · 2026-08 · vendor
  16. Filament PM CFJet technical data sheet (TDS CFJet ENG.pdf) Filament PM (Plasty Mladec) · 2026-08 · tds
  17. Filastruder product catalogue Filastruder · 2026-08 · vendor
  18. ZYLtech ASA-GF Glass Fiber filament — product page ZYLtech · 2026-08 · vendor
  19. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  20. IEMAI ASA 3D Printing Filament product page IEMAI 3D · 2026-08 · vendor
  21. SUNLU ASA 3D Printer Filament 1 kg SUNLU · 2026-08 · vendor
  22. YXPOLYER ASA Purple product page YXPOLYER · 2026-08 · vendor
  23. ELEGOO product catalogue ELEGOO · 2026-08 · vendor
  24. ASA — FDM Material Data Sheet (includes 1000 h QUV exposure results) Stratasys · 2026-08 · tds
  25. ABS / ASA / PC Usage Guide Bambu Lab Wiki · 2026-08 · doc
  26. Max volumetric speed Prusa Knowledge Base · 2026-08 · doc
  27. BambuLab PETG Basic vs Translucent vs PETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  28. PET and PETG — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  29. ASA — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  30. Filament Material Guide Prusa Knowledge Base · 2026-08 · doc
  31. CARBONX PETG+CF — product page (print recommendations) 3DXTech · 2026-08 · doc
  32. Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
  33. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  34. ApolloX Technical Data Sheet Formfutura · 2026-08 · tds
  35. Mechanical, Fatigue, and Thermal Characterization of ASA, Nylon 12, PC and PC-ABS Manufactured by Fused Filament Fabrication (FFF) Polymers 18(2):302 · 2026-01 · paper
  36. Mechanical Properties of Additively Manufactured Polymeric Materials — PLA and PETG — For Biomechanical Applications Polymers 16(13):1868 · 2024-06 · paper
  37. Prusament ASA — material page Prusa Polymers · 2026-08 · doc
  38. Basalt Fiber Composites with Reduced Thermal Expansion for Additive Manufacturing Polymers 14(15):3216 · 2022-08 · paper
  39. PETG — material basics Polymaker Wiki · 2026-08 · doc
  40. 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
  41. Chemical resistance — resistance of Ensinger plastics to chemicals (DIN 50 014, 23/50) Ensinger · 2026-08 · tds
  42. Eastman Spectar copolyester — Chemical resistance (unstressed bars, 1 year at 23 °C) Eastman Chemical Company · 2026-08 · tds
  43. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc
  44. HIPS — Knowledge Base Prusa Research · 2026-08 · doc