3D Printing Info

Filament comparison

ASA-GF vs PC-CF

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

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

2 selected · all documented properties

Open these two in the interactive comparisonMore ASA-GF comparisonsMore PC-CF comparisons
ASA-GF vs PC-CF — documented properties and sources
PropertyGlass-fibre ASA (ASA-GF)ASACarbon-fibre PC (PC-CF)PC
Market snapshot
Listing priceUSD/kg; dated snapshots$29.95/kg median; $26.99–$33.99/kg across 3 dated product listings$62.58/kg median; $34.99–$117.33/kg across 6 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]Polycarbonate reinforced with chopped carbon fibre[3][4]
Densityg/cm³1.07 (ZYLtech) and 1.11 (Spectrum), ISO 1183[1][2]1.22 (Prusament) and 1.36 (3DXTech), ISO 1183[3][4]
Typical priceUSD/kg1 kg spools cluster near 28[5][6]1 kg-equivalent spools span 35–117; the middle of the market is about 63[7][8][9][10][11]
Price range across brandsUSD/kg27–34 across brands; Ambrosia 27, ZYLtech 30, Siraya Tech 34[5][6][12]35–117 across brands; Ambrosia 35, IEMAI 39, YXPOLYER 55, Spectrum PC CF 70, Prusament 94, 3DXTech 117[7][8][9][10][11]
Market availability1–5Niche, a handful of specialist brands[5][1][2]Available from several mainstream brands[7][9][5]
Spool sizes & diameters1.75 and 2.85 mm; 1 kg spools[2][5]1.75 and 2.85 mm; 0.75, 0.8 and 1 kg spools[7][9]
Typical applicationsOutdoor brackets and mounts that need stiffness and dimensional stability under sun and moisture[1][2]Stiff high-temperature structural parts — jigs, drone frames and under-bonnet brackets[3][4]
Diameter tolerance± mm±0.01 at 95 % probability and ±0.02 at 100 % (ZYLtech)[2]±0.04 (Prusament PC Blend Carbon Fiber)[3]
Printing Parameters
Nozzle temperature°C240–270 (Spectrum); 240–280 (ZYLtech)[1][2]285 ± 10 (Prusament)[3]
Bed temperature°C80–100 (Spectrum); 90–110 on PEI (ZYLtech)[1][2]110 ± 10 (Prusament)[3]
Enclosure / chamber requirement1–5Enclosure recommended[13]Enclosure required (passive)[3][13]
Part cooling fan0–20 % (Spectrum)[1]Off — Prusa allows 0–20 % and warns cooling significantly reduces interlayer adhesion[3]
Bed surface & adhesion aidPEI sheet, BuildTak or an adhesion aid such as Magigoo (Polymaker); Simplify3D also lists Kapton tape and ASA slurry[14][15]PEI with a glue stick or a commercial adhesive[16]
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][17]Not documented
Warping tendency1–5Moderate — needs adhesion aid or draught shield[13]High — enclosure needed for reliable large parts; the fibre reduces warping against unfilled PC[3][13]
Bed-adhesion difficulty1–5Needs a specific surface plus adhesive[14]Needs a specific surface plus adhesive[16][18]
Stringing / oozing tendency1–5Slight — Polymaker advises 1–2 mm retraction at 20–30 mm/s[14]Moderate — retraction tuning needed; Polymaker flags stringing as a common PC problem[18]
Overall printing difficulty1–5Intermediate — dry filament and a tuned profile; ZYLtech requires a hardened nozzle of 0.6 mm or larger[2][1]Advanced — enclosure, hardware upgrades, tuning; hardened nozzle mandatory[13][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[13]
Abrasiveness1–5Highly abrasive — standard GF composite[1][2]Highly abrasive — standard CF composite[13]
Nozzle clog risk1–5Moderate — needs dry filament and a clean nozzle; Prusa lists higher risk of nozzle clogging for glass-filled composites[19]High — jams from moisture, heat creep or particles; PC already absorbs water from the air and 3DXTech adds a hardened 0.4 mm minimum nozzle, 0.25 mm layers and a 120 °C pre-dry[20][16][19]
Heat-creep / jam sensitivity1–5Slightly sensitive[15]Slightly sensitive[16]
Hotend requirementNo special hotend required[15]All-metal hot end required (Simplify3D)[16]
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[21][22][23]Low (0.1–0.3 %) — the PC matrix takes up 0.15–0.25 % and 3DXTech specifies a 120 °C, 4 h pre-dry[24][25][20]
Equilibrium moisture content at ~50 % RH%Not documented0.11 after 7 days at 24 °C / 22 % RH (Prusa Polymers)[3]
Symptoms when wetBubbling and popping at the nozzle, stringing and a rough surface[26]Bubbling and popping at the nozzle, stringing and a rough surface[26]
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[26]No dry-versus-conditioned figures are published. Polymaker calls PC highly hygroscopic and requires a 70–80 °C dry for 6–8 h; run wet, the loss shows as surface defects and poor layer adhesion[18][26]
Storage requirementSealed with desiccant; Polymaker rates the styrenics moderate-sensitivity[26]Airtight containers with desiccant to prevent reabsorption[18]
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]64 ± 3 printed horizontal and 70 ± 3 printed vertical at yield, ISO 527-1 (Prusament); 3DXTech quotes 73 at break[3][4]
Young's modulusMPa2540–2890 (ZYLtech; specimen type not stated) and 2550 (Spectrum, injection-moulded), ISO 527[2][1]2600 printed horizontal and 3200 printed vertical, ISO 527-1 (Prusament); 3DXTech quotes 6980[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]4.6 at yield printed horizontal (Prusament); 3DXTech quotes 2.1 at break[3][4]
Flexural strengthMPaNot documented94 ± 3 printed horizontal and 130 ± 2 printed vertical, ISO 178 (Prusament); 3DXTech quotes 85[3][4]
Flexural modulusMPa2130–2480 flexural modulus, ISO 178 (ZYLtech; specimen type not stated)[2]3500 printed horizontal and 4200 printed vertical, ISO 178 (Prusament); 3DXTech quotes 6540[3][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]12 ± 1 printed horizontal and 17 ± 2 printed vertical, ISO 179-1 notched (Prusament)[3]
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 32 ± 5 printed horizontal and 35 ± 4 printed vertical (Prusament, ISO 179-1)[3]
Layer adhesion / Z tensileMPaNot documented23 ± 2 (Prusa Polymers interlayer adhesion test) — above the 21 ± 2 of unfilled Prusament PC Blend[3][25]
Brittleness1–5Brittle — snaps with little warning; elongation at break 3.4 %[2]Moderate[3][4]
Hardness (scale-specific)Shore A / Shore D / RockwellNot documented83 Shore D (Prusa Polymers method), against 79 for unfilled Prusament PC Blend[3][25]
Creep resistance / sustained load1–5Good — no creep test found; chopped glass fibre lifts modulus to 2540–2890 against 2379–2450 for unfilled ASA[2][22][21]Excellent — holds load for years. Room-temperature tensile creep of moulded unfilled PC ran unbroken at 41 MPa until the test was stopped; short carbon fibre raises the flexural modulus from about 2.1 to 3.5-6.5 GPa, which reduces creep strain further[27][3]
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][22][21]Good. No fatigue test data was found for a carbon-fibre PC filament; the unfilled polymer is rated Good on the same scale[27]
Elasticity / flexibility1–5Rigid[2]Rigid[3]
Thermal Properties
HDT at 0.45 MPa°C100 (Spectrum, injection-moulded, ISO 75 at 0.45 MPa)[1]114 (ISO 75, 0.45 MPa, Prusament)[3]
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]106 (ISO 75, 1.8 MPa, Prusament), against 93 for unfilled Prusament PC Blend[3][25]
Glass transition (Tg)°CNot documented127 (3DXTech, DSC)[4]
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]Not documented
Continuous service temperature°C93 — Prusa publishes this as the temperature resistance of Prusament ASA[28]113 — Prusa publishes this as the temperature resistance of Prusament PC Blend[25]
Flammability / UL 94Flammable; no UL 94 rating published[21]Not documented
Environment & Chemical
UV resistance1–5Excellent — designed for permanent outdoor use; Spectrum states the parts resist prolonged UV and moisture exposure[1][29]Degrades within weeks outdoors unless stabilised[18]
Chemical resistanceGood against weak acids, weak alkalis, oils and grease; dissolved by acetone[22]Withstands oils, solvents and fuels; Polymaker rates it good against weak acids[18]
Food contactNot food safe[14]Bisphenol-A polycarbonate is not offered as food-contact filament[18]
Biodegradability / compostabilityNot biodegradable[14]Not biodegradable[18]
RecyclabilityNot accepted in household plastic collection[14]Mechanically recyclable but not accepted in household plastic collection[18]
Electrical & ESD propertiesNot documentedSurface resistance above 10⁹ ohm/sq — not static-dissipative (3DXTech, ASTM D257)[4]
Health & Safety
Fume toxicity1–5High — hazardous VOC such as styrene; enclosure and filtration needed[30][13]Moderate — measurable VOCs and UFPs, ventilation advised[30]
Ultrafine-particle emission rateparticles/minNot documented≈4 × 10¹⁰ median — the highest ultrafine-particle rate of the nine filaments in the chamber study, above every ABS tested[30]
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[13][30]Not documented
Ventilation / filtration requirement1–5Enclosure with carbon and HEPA filtration[30][13]Ventilated room or enclosure recommended[30][13]
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[4]
Post-Processing
Sanding & machiningSands well and takes filler before painting[14]Sands and machines well; the toughness means it cuts rather than chips[16]
Painting & finishingPaints readily; ASA holds colour outdoors so many parts are left unpainted[14]Not documented
Gluing & solvent weldingSolvent-welds with acetone[22]Cyanoacrylate; dichloromethane solvent-welds PC but is a laboratory reagent[16]
Vapour / chemical smoothingAcetone vapour smoothing works[22]No practical vapour smoothing[16]
Support material pairingHIPS breaks away or dissolves in d-limonene; Bambu Lab sells a Support for ABS that also serves ASA[13]Prints its own supports; 3DXTech sells a dedicated PC break-away support[16]
Solvents & Solubility
Soluble inAcetone dissolves the resin and leaves the fibre; MEK, THF, ethyl acetate and chlorinated solvents attack the styrenic backbone.[31][22]Dichloromethane and chloroform dissolve the matrix and leave the fibre; DMF and dioxane do the same (Covestro).[32]
Softened or crazed byLimonene attacks some grades — Prusa reports Prusament ASA Orange flaking apart as layer adhesion fails.[33]Methanol, butyl acetate, ether, 1 % NaOH and phthalate plasticisers stress-crack it; acetone, MEK and xylene swell it.[32]
Solvent welding & smoothing agentAcetone vapour reaches only the resin fraction, so the fibre is left standing proud of the smoothed surface.[34][22]Dichloromethane cement welds the resin, but the fibre keeps the joint from flowing closed. Controlled carcinogen.[35]

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. Prusament PC Blend Carbon Fiber Technical Datasheet v2.0 Prusa Polymers · 2023-04 · tds
  4. CarbonX Carbon Fiber ezPC Polycarbonate Technical Data Sheet 3DXTech · 2026-08 · tds
  5. Filastruder product catalogue Filastruder · 2026-08 · vendor
  6. ZYLtech ASA-GF Glass Fiber filament — product page ZYLtech · 2026-08 · vendor
  7. Printed Solid product catalogue Printed Solid · 2026-08 · vendor
  8. Spectrum PC CF Carbon Black, 1.75 mm / 250 g 3DJAKE · 2026-08 · vendor
  9. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  10. IEMAI CF-PC 3D Printing Filament product page IEMAI 3D · 2026-08 · vendor
  11. YXPOLYER PC CF product page YXPOLYER · 2026-08 · vendor
  12. Siraya Tech Fibreheart ASA-GF Filament product page Siraya Tech · 2026-08 · vendor
  13. ABS / ASA / PC Usage Guide Bambu Lab Wiki · 2026-08 · doc
  14. ASA — material basics Polymaker Wiki · 2026-08 · doc
  15. ASA — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  16. Polycarbonate — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  17. Max volumetric speed Prusa Knowledge Base · 2026-08 · doc
  18. PC — material basics Polymaker Wiki · 2026-08 · doc
  19. Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
  20. CARBONX ezPC+CF — product page (print recommendations) 3DXTech · 2026-08 · doc
  21. Bambu Filament Technical Data Sheet V3.0 — ASA Bambu Lab · 2026-08 · tds
  22. PolyLite ASA Technical Data Sheet Polymaker · 2024-11 · tds
  23. Prusament ASA Technical Datasheet v1.1 Prusa Polymers · 2024-05 · tds
  24. Bambu Filament Technical Data Sheet V2.0 — PC Bambu Lab · 2026-08 · tds
  25. Prusament PC Blend Technical Datasheet v1.1 Prusa Polymers · 2022-02 · tds
  26. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  27. Experimental data for creep and dynamic mechanical properties of polycarbonate and polycarbonate/ABS Data in Brief 42:108264 · 2022-06 · paper
  28. Prusament ASA — material page Prusa Polymers · 2026-08 · doc
  29. ASA — FDM Material Data Sheet (includes 1000 h QUV exposure results) Stratasys · 2026-08 · tds
  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. Makrolon — The chemical resistance (Makrolon 2800, 6 days at 23 °C and 50 °C) Covestro · 2016-12 · tds
  33. HIPS — Knowledge Base Prusa Research · 2026-08 · doc
  34. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc
  35. Weld-On 3 Acrylic Plastic Cement — technical data sheet (shipped as dichloromethane) IPS Corporation · 2002-07 · tds