3D Printing Info

Filament comparison

ASA-GF vs PEEK

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

Glass-fibre ASA (ASA-GF) guidePEEK guide

2 selected · all documented properties

Open these two in the interactive comparisonMore ASA-GF comparisonsMore PEEK comparisons
ASA-GF vs PEEK — documented properties and sources
PropertyGlass-fibre ASA (ASA-GF)ASAPEEKHIGHTEMP
Market snapshot
Listing priceUSD/kg; dated snapshots$29.95/kg median; $26.99–$33.99/kg across 3 dated product listings$531.87/kg median; $296.14–$770.00/kg across 5 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]Polyether ether ketone — a semi-crystalline polyaryletherketone[3]
Densityg/cm³1.07 (ZYLtech) and 1.11 (Spectrum), ISO 1183[1][2]1.30 (ISO 1183)[3][4]
Typical priceUSD/kg1 kg spools cluster near 28[5][6]1 kg-equivalent spools span 296–770; the middle of the market is about 532[7][8][9]
Price range across brandsUSD/kg27–34 across brands; Ambrosia 27, ZYLtech 30, Siraya Tech 34[5][6][10]296-770 across brands and spool sizes; 3D4Makers recycled R-PEEK 296 at 750 g, IEMAI 3D 420 at 1 kg, LEHVOSS Luvocom 3F PEEK 9581 532 at 2 kg, 3DXTech ThermaX PEEK 770 at 500 g[7][8][9]
Market availability1–5Niche, a handful of specialist brands[5][1][2]Niche, a handful of specialist brands[7][8][4]
Spool sizes & diameters1.75 and 2.85 mm; 1 kg spools[2][5]1.75 and 2.85 mm; 200 g to 2 kg spools[7][8][4]
Typical applicationsOutdoor brackets and mounts that need stiffness and dimensional stability under sun and moisture[1][2]Aerospace brackets, semiconductor handling, sterilisable medical tooling and downhole parts[3]
Diameter tolerance± mm±0.01 at 95 % probability and ±0.02 at 100 % (ZYLtech)[2]Not documented
Printing Parameters
Nozzle temperature°C240–270 (Spectrum); 240–280 (ZYLtech)[1][2]380-400 (3DXTech printed-specimen conditions); Victrex quotes a 340-450 melt range for AM 450 FIL[3][4]
Bed temperature°C80–100 (Spectrum); 90–110 on PEI (ZYLtech)[1][2]130–140 (3DXTech)[3]
Enclosure / chamber requirement1–5Enclosure recommended[11]Actively heated chamber required[12][13]
Recommended chamber temperature°CNot documentedNot less than 150 for semi-crystalline printing (Victrex AM 450 FIL); bed above 150[4]
Part cooling fan0–20 % (Spectrum)[1]Not documented
Bed surface & adhesion aidPEI sheet, BuildTak or an adhesion aid such as Magigoo (Polymaker); Simplify3D also lists Kapton tape and ASA slurry[14][15]Not documented
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][16]Not documented
Warping tendency1–5Moderate — needs adhesion aid or draught shield[11]Severe — heated chamber needed[12]
Bed-adhesion difficulty1–5Needs a specific surface plus adhesive[14]Very difficult — special plates or slurry required[12]
Stringing / oozing tendency1–5Slight — Polymaker advises 1–2 mm retraction at 20–30 mm/s[14]Not documented
Overall printing difficulty1–5Intermediate — dry filament and a tuned profile; ZYLtech requires a hardened nozzle of 0.6 mm or larger[2][1]Expert / industrial hardware only[12][13]
Extruder requirementZYLtech specifies a hardened nozzle 0.6 mm or larger; Spectrum bases its settings on a 0.5 mm nozzle[2][1]An all-metal hot end rated above 400 °C and a heated chamber; 3DXTech tests at 0.25 mm layer height on a 0.4 mm nozzle[3][12]
Hardware Wear & Reliability
Nozzle hardness required1–4Hardened steel required — Spectrum recommends ruby or hardened, ZYLtech requires hardened[1][2]Brass fine indefinitely for unfilled grades, but brass softens near these nozzle temperatures — hardened or plated hot ends are the norm[12]
Abrasiveness1–5Highly abrasive — standard GF composite[1][2]Non-abrasive when unfilled[3]
Nozzle clog risk1–5Moderate — needs dry filament and a clean nozzle; Prusa lists higher risk of nozzle clogging for glass-filled composites[17]Moderate — needs dry filament and a clean nozzle; 3DXTech lists no special nozzle concerns but a mandatory 120 °C pre-dry before every print[18]
Heat-creep / jam sensitivity1–5Slightly sensitive[15]Not documented
Hotend requirementNo special hotend required[15]Not documented
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[19][20][21]Not documented
Equilibrium moisture content at ~50 % RH%Not documented0.45 at saturation, 23 °C (ISO 62); 0.55 at 100 °C[4]
Drying temperature & timeNot documented120 °C for 5 h, target below 0.020 % moisture (Victrex AM 450 FIL)[4]
Symptoms when wetBubbling and popping at the nozzle, stringing and a rough surface[22]Not documented
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[22]No 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[18]
Storage requirementSealed with desiccant; Polymaker rates the styrenics moderate-sensitivity[22]Not documented
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]60-100 (printed XY): Victrex AM 450 FIL 60-80 at yield and 3DXTech 100, both ISO 527; 98 at yield injection-moulded[3][4]
Young's modulusMPa2540–2890 (ZYLtech; specimen type not stated) and 2550 (Spectrum, injection-moulded), ISO 527[2][1]3000-4000 (printed XY, ISO 527, Victrex AM 450 FIL); 3720 (3DXTech); 4000 injection-moulded[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]28 (printed XY, ISO 527) — remarkably ductile for a high-temperature polymer[3]
Flexural strengthMPaNot documented130 (printed XY, ISO 178)[3]
Flexural modulusMPa2130–2480 flexural modulus, ISO 178 (ZYLtech; specimen type not stated)[2]2700 (printed XY, ISO 178)[3]
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]6.0 (injection-moulded, ISO 179/1eA); unnotched does not break[4]
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]Izod notched 7.0 kJ/m2 injection-moulded (ISO 180/A). Printed anisotropy is extreme: VICTREX AM 200 on a Stratasys F900 gives Izod notched 1380-1530 J/m XZ against 30-62 J/m ZX (ASTM D256)[4][23]
Layer adhesion / Z tensileMPaNot documented20-85 at yield (printed ZX, ISO 527, Victrex AM 450 FIL); the spread is set by chamber temperature and weld quality[4]
Brittleness1–5Brittle — snaps with little warning; elongation at break 3.4 %[2]Tough — absorbs impact, yields before breaking[3]
Hardness (scale-specific)Shore A / Shore D / RockwellNot documentedShore D 84.5 (injection-moulded, ISO 868); Rockwell M100 / R125 on extruded PEEK stock (ASTM D785)[4][24]
Creep resistance / sustained load1–5Good — no creep test found; chopped glass fibre lifts modulus to 2540–2890 against 2379–2450 for unfilled ASA[2][20][19]Excellent — holds load for years. Victrex rates PEEK for long-term creep; injection-moulded flexural stress at 3.5 % strain falls only from 125 MPa at 23 °C to 85 MPa at 125 °C, and extruded stock is rated to 249 °C continuous[25][4][24]
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][20][19]Excellent — living hinges viable. Victrex rates PEEK for long-term fatigue as well as creep[25]
Elasticity / flexibility1–5Rigid[2]Rigid[3]
Z strength as % of XY%Not documented71-84 (VICTREX AM 200 LMPAEK printed on the Stratasys F900 and Fortus 450mc, ZX against XZ tensile yield, ASTM D638); unfilled PEEK's own ZX spread is wider[23]
Thermal Properties
HDT at 0.45 MPa°C100 (Spectrum, injection-moulded, ISO 75 at 0.45 MPa)[1]140 (printed XY, ISO 75 at 0.45 MPa, 3DXTech)[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]152 (unannealed, ISO 75-2/Af, Victrex AM 450 FIL); 160 on extruded stock (ASTM D648 at 264 psi)[4][24]
Glass transition (Tg)°CNot documented143 (DSC, 3DXTech); Victrex gives onset 143 and midpoint 150 (ISO 11357-2)[3][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]343 melting (ISO 11357-3, Victrex); VICTREX AM 200 LMPAEK melts at 303[4][23]
Continuous service temperature°C93 — Prusa publishes this as the temperature resistance of Prusament ASA[26]240 UL 746B relative thermal index, strength (RTI electrical 260, impact 180); Ensinger rates extruded PEEK stock at 249 long term[4][24]
Thermal expansion (CTE)µm/m·KNot documented37.8 (extruded PEEK stock, 23-60 °C, ASTM E831; source states 2.1e-5 in/in/°F), rising to 41.9 at 60-100 °C and 55.8 at 100-150 °C[24]
Flammability / UL 94Flammable; no UL 94 rating published[19]UL 94 V-0 at 1.5 mm on the base resin; glow-wire flammability index 960 °C at 2.0 mm (IEC 60695-2-12)[3][4]
Environment & Chemical
UV resistance1–5Excellent — designed for permanent outdoor use; Spectrum states the parts resist prolonged UV and moisture exposure[1][27]Not documented
Chemical resistanceGood against weak acids, weak alkalis, oils and grease; dissolved by acetone[20]Outstanding — resistant to almost all solvents and to steam sterilisation[3]
Water / humidity resistance in service1–5Not documentedExcellent — essentially unaffected; 0.45 % water at saturation and resistant to steam sterilisation[4][3]
Food contactNot food safe[14]Not documented
Biodegradability / compostabilityNot biodegradable[14]Not documented
RecyclabilityNot accepted in household plastic collection[14]Not documented
Health & Safety
Fume toxicity1–5High — hazardous VOC such as styrene; enclosure and filtration needed[28][11]Moderate — 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[28]
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[11][28]Not documented
Ventilation / filtration requirement1–5Enclosure with carbon and HEPA filtration[28][11]Ventilated room or enclosure recommended[28]
Dust & fibre handling hazardGlass fibre is bound in the matrix; avoid inhaling sanding dust[1]Not documented
Post-Processing
Sanding & machiningSands well and takes filler before painting[14]Not documented
Painting & finishingPaints readily; ASA holds colour outdoors so many parts are left unpainted[14]Not documented
Gluing & solvent weldingSolvent-welds with acetone[20]Not documented
Vapour / chemical smoothingAcetone vapour smoothing works[20]Not documented
Support material pairingHIPS breaks away or dissolves in d-limonene; Bambu Lab sells a Support for ABS that also serves ASA[11]Not documented
Solvents & Solubility
Soluble inAcetone dissolves the resin and leaves the fibre; MEK, THF, ethyl acetate and chlorinated solvents attack the styrenic backbone.[29][20]95–98 wt% sulphuric acid dissolves it — 10 g per 100 mL at 40–70 °C gives a dark red solution. Laboratory route only.[30][29]
Softened or crazed byLimonene attacks some grades — Prusa reports Prusament ASA Orange flaking apart as layer adhesion fails.[31]Concentrated nitric, hydrofluoric, hydrobromic and hydriodic acids attack it; DCM, DMSO and THF swell thin-walled sections.[32][29]
Solvent welding & smoothing agentAcetone vapour reaches only the resin fraction, so the fibre is left standing proud of the smoothed surface.[33][20]None — no solvent softens PEEK, so parts are joined thermally or mechanically, never chemically.[32][29]

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. ThermaX PEEK Technical Data Sheet v3 3DXTech · 2026-08 · tds
  4. VICTREX AM 450 FIL — datasheet Victrex · 2025-12 · tds
  5. Filastruder product catalogue Filastruder · 2026-08 · vendor
  6. ZYLtech ASA-GF Glass Fiber filament — product page ZYLtech · 2026-08 · vendor
  7. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  8. 3D4Makers product catalogue 3D4Makers · 2026-08 · vendor
  9. IEMAI 3D PEEK 3D Printing Filament — store page IEMAI 3D · 2026-08 · vendor
  10. Siraya Tech Fibreheart ASA-GF Filament product page Siraya Tech · 2026-08 · vendor
  11. ABS / ASA / PC Usage Guide Bambu Lab Wiki · 2026-08 · doc
  12. Prusament PEI 1010 Technical Datasheet v1.0 Prusa Polymers · 2024-09 · tds
  13. Prusament PEI 1010 — material page Prusa Polymers · 2026-08 · doc
  14. ASA — material basics Polymaker Wiki · 2026-08 · doc
  15. ASA — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  16. Max volumetric speed Prusa Knowledge Base · 2026-08 · doc
  17. Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
  18. ThermaX PEEK — product page 3DXTech · 2026-08 · vendor
  19. Bambu Filament Technical Data Sheet V3.0 — ASA Bambu Lab · 2026-08 · tds
  20. PolyLite ASA Technical Data Sheet Polymaker · 2024-11 · tds
  21. Prusament ASA Technical Datasheet v1.1 Prusa Polymers · 2024-05 · tds
  22. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  23. VICTREX AM 200 — FDM Material Data Sheet Stratasys · 2024-04 · tds
  24. TECAPEEK natural (PEEK) — stock shape properties Ensinger · 2026-08 · tds
  25. PEEK polymers — product overview Victrex · 2026-08 · doc
  26. Prusament ASA — material page Prusa Polymers · 2026-08 · doc
  27. ASA — FDM Material Data Sheet (includes 1000 h QUV exposure results) Stratasys · 2026-08 · tds
  28. 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
  29. Chemical resistance — resistance of Ensinger plastics to chemicals (DIN 50 014, 23/50) Ensinger · 2026-08 · tds
  30. 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
  31. HIPS — Knowledge Base Prusa Research · 2026-08 · doc
  32. What solvents are not compatible with PEEK? — fluidics technical FAQ IDEX Health & Science · 2026-08 · doc
  33. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc