3D Printing Info

Filament comparison

ASA-GF vs PETG-CF

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

Glass-fibre ASA (ASA-GF) guideCarbon-fibre PETG (PETG-CF) guide

2 selected · all documented properties

Open these two in the interactive comparisonMore ASA-GF comparisonsMore PETG-CF comparisons
ASA-GF vs PETG-CF — documented properties and sources
PropertyGlass-fibre ASA (ASA-GF)ASACarbon-fibre PETG (PETG-CF)PETG
Market snapshot
Listing priceUSD/kg; dated snapshots$29.95/kg median; $26.99–$33.99/kg across 3 dated product listings$29.99/kg median; $16.00–$74.22/kg across 11 dated product listings
Identity & Market
Base polymer / chemistryASA reinforced with chopped glass fibre — 10 wt% (Spectrum ASA-X GF10), 15 wt% (ZYLtech ASA-GF)[1][2]PETG reinforced with chopped carbon fibre[3][4]
Densityg/cm³1.07 (ZYLtech) and 1.11 (Spectrum), ISO 1183[1][2]1.25 (Bambu Lab) to 1.34 (3DXTech), ISO 1183; Prusament 1.27[3][5][4]
Typical priceUSD/kg1 kg spools cluster near 28[6][7]1 kg-equivalent spools span 16–74; the middle of the market is about 29[3][8][9][10][11][12][13][14]
Price range across brandsUSD/kg27–34 across brands; Ambrosia 27, ZYLtech 30, Siraya Tech 34[6][7][15]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[16][3][17][8][9][10][11][12][13][14]
Market availability1–5Niche, a handful of specialist brands[6][1][2]Stocked by most mainstream brands[3][17][8][16]
Spool sizes & diameters1.75 and 2.85 mm; 1 kg spools[2][6]1.75 and 2.85 mm; 0.75 and 1 kg spools[17][3]
Typical applicationsOutdoor brackets and mounts that need stiffness and dimensional stability under sun and moisture[1][2]Stiff functional parts and fixtures where PETG's toughness is traded for rigidity and a matte finish[3][4]
Diameter tolerance± mm±0.01 at 95 % probability and ±0.02 at 100 % (ZYLtech)[2]±0.02 (Prusament)[4]
Printing Parameters
Nozzle temperature°C240–270 (Spectrum); 240–280 (ZYLtech)[1][2]240–270 (Bambu Lab); 265 ± 10 (Prusament)[3][4]
Bed temperature°C80–100 (Spectrum); 90–110 on PEI (ZYLtech)[1][2]65–75 (Bambu Lab); 90 ± 10 (Prusament)[3][4]
Enclosure / chamber requirement1–5Enclosure recommended[18]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 fan0–20 % (Spectrum)[1]0–60 % (Bambu Lab); 50 % (Prusament)[3][4]
Bed surface & adhesion aidPEI sheet, BuildTak or an adhesion aid such as Magigoo (Polymaker); Simplify3D also lists Kapton tape and ASA slurry[19][20]Textured PEI or engineering plate with glue (Bambu Lab)[3]
Maximum volumetric flow (mm³/s; see test conditions)mm³/s2.4–5.6 at Spectrum's 30–70 mm/s on a 0.4 mm nozzle at 0.2 mm layer; ZYLtech allows up to 200 mm/s[1][2][21]11.5 on My Tech Fun's Bambu Lab PETG-CF profile[22]
Warping tendency1–5Moderate — needs adhesion aid or draught shield[18]Not documented
Bed-adhesion difficulty1–5Needs a specific surface plus adhesive[19]Needs the right surface or a thin adhesive[3]
Stringing / oozing tendency1–5Slight — Polymaker advises 1–2 mm retraction at 20–30 mm/s[19]Slight — the fibre reduces stringing against unfilled PETG[3][23]
Overall printing difficulty1–5Intermediate — dry filament and a tuned profile; ZYLtech requires a hardened nozzle of 0.6 mm or larger[2][1]Intermediate — dry filament and a tuned profile; hardened nozzle mandatory[3]
Extruder requirementZYLtech specifies a hardened nozzle 0.6 mm or larger; Spectrum bases its settings on a 0.5 mm nozzle[2][1]Not documented
Hardware Wear & Reliability
Nozzle hardness required1–4Hardened steel required — Spectrum recommends ruby or hardened, ZYLtech requires hardened[1][2]Hardened steel required[3]
Abrasiveness1–5Highly abrasive — standard GF composite[1][2]Highly abrasive — standard CF composite[3]
Nozzle clog risk1–5Moderate — needs dry filament and a clean nozzle; Prusa lists higher risk of nozzle clogging for glass-filled composites[24]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[25][24]
Heat-creep / jam sensitivity1–5Slightly sensitive[20]Slightly sensitive[23]
Hotend requirementNo special hotend required[20]Hardened steel nozzle; no high-temperature hot-end needed[3][23]
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Moderate — the ASA matrix takes up 0.40–0.45 % saturated at 25 °C / 55 % RH; no glass-filled grade publishes its own figure[26][27][28]Low — 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 wetBubbling and popping at the nozzle, stringing and a rough surface[29]Bubbling and popping at the nozzle, stringing and a rough surface[29]
Effect of moisture on strengthNo dry-versus-conditioned figures are published; Polymaker groups the styrenics as moderate-sensitivity and absorbed water shows as bubbling and poor layer adhesion[29]No dry-versus-conditioned figures published; Bambu Lab states PETG-CF must be properly dried before printing and stored dry after use[3][29]
Storage requirementSealed with desiccant; Polymaker rates the styrenics moderate-sensitivity[29]Sealed with desiccant; Bambu Lab says store dry after use[3][29]
Mechanical Properties
Tensile strength (XY)MPa33–36 at break, ISO 527 (ZYLtech; specimen type not stated); Spectrum quotes 55 at break on injection-moulded specimens[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 modulusMPa2540–2890 (ZYLtech; specimen type not stated) and 2550 (Spectrum, injection-moulded), ISO 527[2][1]2460 ± 230 (Bambu Lab) and 1700 (Prusament) printed XY, ISO 527[3][4]
Elongation at break%3.4 at break (ZYLtech; specimen type not stated); Spectrum quotes 2.80 at yield on injection-moulded specimens[2][1]4.3 at yield (Prusament, printed XY, ISO 527); 3 at break for 3DXTech[4][5]
Flexural strengthMPaNot documented68 ± 3 printed horizontal, ISO 178 (Prusament)[4]
Flexural modulusMPa2130–2480 flexural modulus, ISO 178 (ZYLtech; specimen type not stated)[2]2300 printed horizontal, 3100 printed vertical, ISO 178 (Prusament)[4]
Charpy impact, notchedkJ/m²8.3 notched Charpy at 23 °C on injection-moulded specimens (Spectrum, ISO 179-1eA); ZYLtech publishes notched Izod 6.9 by ISO 180 instead[1][2]Not documented
Other impact dataCharpy unnotched 25 kJ/m² at 23 °C on injection-moulded specimens (Spectrum, ISO 179-1eU); ZYLtech notched Izod 6.9 kJ/m² (ISO 180)[1][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][22]
Layer adhesion / Z tensileMPaNot documented29 ± 4 printed Z (Bambu Lab, ISO 527); 18 ± 3 by Prusa's interlayer adhesion test; 10.7 on My Tech Fun bars[3][4][22]
Brittleness1–5Brittle — snaps with little warning; elongation at break 3.4 %[2]Brittle — snaps with little warning[5]
Hardness (scale-specific)Shore A / Shore D / RockwellNot documented77 Shore D (Prusa Polymers method)[4]
Creep resistance / sustained load1–5Good — no creep test found; chopped glass fibre lifts modulus to 2540–2890 against 2379–2450 for unfilled ASA[2][27][26]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[22]
Fatigue / repeated-flex resistance1–5Below average — no GF-grade S-N curve; elongation at break falls to 3.4 % against 6.7–9.2 % for unfilled ASA[2][27][26]Moderate — no CF-grade S-N curve; unfilled printed PETG ran 79 000–193 000 cycles at 30 % of tensile strength[30]
Elasticity / flexibility1–5Rigid[2]Rigid[3]
Z strength as % of XY%Not documented83 (Bambu Lab, printed Z against XY tensile)[3]
Thermal Properties
HDT at 0.45 MPa°C100 (Spectrum, injection-moulded, ISO 75 at 0.45 MPa)[1]74 (Bambu Lab) and 96 (Prusament), ISO 75 at 0.45 MPa[3][4]
HDT at 1.8 MPa°C97–99 unannealed (ZYLtech, ISO 75 at 1.8 MPa; specimen type not stated); Spectrum 90 on injection-moulded specimens[2][1]68 (Bambu Lab) and 80 (Prusament), ISO 75 at 1.8 MPa[3][4]
Glass transition (Tg)°CNot documented68 (Bambu Lab) and 80 (3DXTech), DSC[3][5]
Melting point / Vicat°CAmorphous ASA matrix; Vicat 98 (Spectrum, ISO 306). ZYLtech quotes a 210–220 °C melting range by ISO 11357 for its grade[1][2]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[31]77 — loaded bars begin to move at this temperature, against 61 for Bambu Lab PETG Basic[22]
Flammability / UL 94Flammable; no UL 94 rating published[26]Flammable; no UL 94 rating published[3]
Environment & Chemical
UV resistance1–5Excellent — designed for permanent outdoor use; Spectrum states the parts resist prolonged UV and moisture exposure[1][32]Moderate — a season or two; the carbon fibre does not add UV stabilisation[33]
Chemical resistanceGood against weak acids, weak alkalis, oils and grease; dissolved by acetone[27]Withstands acids, alkalis, oils and UV exposure, as for unfilled PETG[33]
Food contactNot food safe[19]Not certified for food contact[33]
Biodegradability / compostabilityNot biodegradable[19]Not biodegradable[33]
RecyclabilityNot accepted in household plastic collection[19]Fibre-filled PETG is not accepted in household plastic collection[33]
Electrical & ESD propertiesNot documentedSurface resistance above 10⁹ ohm/sq — carbon fibre at this loading is not static-dissipative (3DXTech)[5]
Health & Safety
Fume toxicity1–5High — hazardous VOC such as styrene; enclosure and filtration needed[34][18]Moderate — measurable VOCs and UFPs, ventilation advised[34]
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[18][34]Not documented
Ventilation / filtration requirement1–5Enclosure with carbon and HEPA filtration[34][18]Open a window / occasional ventilation[34]
Dust & fibre handling hazardGlass fibre is bound in the matrix; avoid inhaling sanding dust[1]Carbon fibre is bound in the matrix; sanding dust should not be inhaled[5]
Post-Processing
Sanding & machiningSands well and takes filler before painting[19]Sands to a matte finish more readily than unfilled PETG[23]
Painting & finishingPaints readily; ASA holds colour outdoors so many parts are left unpainted[19]Not documented
Gluing & solvent weldingSolvent-welds with acetone[27]Cyanoacrylate; no common solvent welds it[23]
Vapour / chemical smoothingAcetone vapour smoothing works[27]No practical vapour smoothing[23]
Support material pairingHIPS breaks away or dissolves in d-limonene; Bambu Lab sells a Support for ABS that also serves ASA[18]Support 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 inAcetone dissolves the resin and leaves the fibre; MEK, THF, ethyl acetate and chlorinated solvents attack the styrenic backbone.[35][27]No common workshop solvent; dichloromethane — a carcinogen — dissolves the matrix surface, 1,2-dichloroethane destroys it in a week.[36][37]
Softened or crazed byLimonene attacks some grades — Prusa reports Prusament ASA Orange flaking apart as layer adhesion fails.[38]Acetone (+16 % weight over 1 year at 23 °C), ethyl acetate, toluene and DMF swell and soften it; methanol crazes it.[36]
Solvent welding & smoothing agentAcetone vapour reaches only the resin fraction, so the fibre is left standing proud of the smoothed surface.[37][27]Dichloromethane reaches only the resin, so the fibre is left standing proud of the surface. Controlled carcinogen.[37]

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. Spectrum ASA-X GF10 Technical Data Sheet (mechanical and thermal data marked injection-moulded) Spectrum Filaments · 2026-08 · tds
  2. ZYLtech ASA-GF Filament Technical Data Sheet v1 ZYLtech · 2026-08 · 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. Filastruder product catalogue Filastruder · 2026-08 · vendor
  7. ZYLtech ASA-GF Glass Fiber filament — product page ZYLtech · 2026-08 · vendor
  8. Printed Solid product catalogue Printed Solid · 2026-08 · vendor
  9. SUNLU PETG-CF (PETG Carbon Fiber) 3D Printer Filament 1 kg SUNLU · 2026-08 · vendor
  10. Fibreheart PETG-CF Pro Filament product page Siraya Tech · 2026-08 · vendor
  11. IEMAI CF-PETG 3D Printing Filament product page IEMAI 3D · 2026-08 · vendor
  12. Reli3D Carbon Fiber PETG Filament 1.75 mm, 1 kg Reli3D (Amazon US) · 2026-08 · vendor
  13. PET-G CF15 Sakata 3D Filaments · 2026-08 · vendor
  14. Filament PM CFJet technical data sheet (TDS CFJet ENG.pdf) Filament PM (Plasty Mladec) · 2026-08 · tds
  15. Siraya Tech Fibreheart ASA-GF Filament product page Siraya Tech · 2026-08 · vendor
  16. ELEGOO product catalogue ELEGOO · 2026-08 · vendor
  17. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  18. ABS / ASA / PC Usage Guide Bambu Lab Wiki · 2026-08 · doc
  19. ASA — material basics Polymaker Wiki · 2026-08 · doc
  20. ASA — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  21. Max volumetric speed Prusa Knowledge Base · 2026-08 · doc
  22. BambuLab PETG Basic vs Translucent vs PETG-CF — results spreadsheet My Tech Fun (Igor Gaspar) · 2026-08 · test
  23. PET and PETG — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  24. Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
  25. CARBONX PETG+CF — product page (print recommendations) 3DXTech · 2026-08 · doc
  26. Bambu Filament Technical Data Sheet V3.0 — ASA Bambu Lab · 2026-08 · tds
  27. PolyLite ASA Technical Data Sheet Polymaker · 2024-11 · tds
  28. Prusament ASA Technical Datasheet v1.1 Prusa Polymers · 2024-05 · tds
  29. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  30. Mechanical Properties of Additively Manufactured Polymeric Materials — PLA and PETG — For Biomechanical Applications Polymers 16(13):1868 · 2024-06 · paper
  31. Prusament ASA — material page Prusa Polymers · 2026-08 · doc
  32. ASA — FDM Material Data Sheet (includes 1000 h QUV exposure results) Stratasys · 2026-08 · tds
  33. PETG — material basics Polymaker Wiki · 2026-08 · doc
  34. 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
  35. Chemical resistance — resistance of Ensinger plastics to chemicals (DIN 50 014, 23/50) Ensinger · 2026-08 · tds
  36. Eastman Spectar copolyester — Chemical resistance (unstressed bars, 1 year at 23 °C) Eastman Chemical Company · 2026-08 · tds
  37. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc
  38. HIPS — Knowledge Base Prusa Research · 2026-08 · doc