3D Printing Info

Filament comparison

ASA-GF vs PP-GF

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

Glass-fibre ASA (ASA-GF) guideGlass-fibre PP (PP-GF) guide

2 selected · all documented properties

Open these two in the interactive comparisonMore ASA-GF comparisonsMore PP-GF comparisons
ASA-GF vs PP-GF — documented properties and sources
PropertyGlass-fibre ASA (ASA-GF)ASAGlass-fibre PP (PP-GF)POLYOLEFIN
Market snapshot
Listing priceUSD/kg; dated snapshots$29.95/kg median; $26.99–$33.99/kg across 3 dated product listings$49.09/kg median; $46.27–$86.01/kg across 3 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]Polypropylene reinforced with chopped glass fibre[3][4]
Densityg/cm³1.07 (ZYLtech) and 1.11 (Spectrum), ISO 1183[1][2]1.12 (Prusament PP Glass Fiber, ISO 1183) — the glass lifts it above water[3]
Typical priceUSD/kg1 kg spools cluster near 28[5][6]1 kg-equivalent spools cluster near 49[7][8][9]
Price range across brandsUSD/kg27–34 across brands; Ambrosia 27, ZYLtech 30, Siraya Tech 34[5][6][10]46-86 across brands; BCN3D PP GF30 46 at 700 g, BASF Ultrafuse PP GF30 49 at 2.2 kg, Prusament PP Glass Fiber 86 at 850 g[7][8][9]
Market availability1–5Niche, a handful of specialist brands[5][1][2]Available from several mainstream brands[7][8][9]
Spool sizes & diameters1.75 and 2.85 mm; 1 kg spools[2][5]1.75 and 2.85 mm; 700 g, 850 g and 2.2 kg spools[7][8][9]
Typical applicationsOutdoor brackets and mounts that need stiffness and dimensional stability under sun and moisture[1][2]Stiff, chemically resistant parts where PP-CF's cost or conductivity is unwanted[4]
Diameter tolerance± mm±0.01 at 95 % probability and ±0.02 at 100 % (ZYLtech)[2]±0.04 (Prusament)[3]
Printing Parameters
Nozzle temperature°C240–270 (Spectrum); 240–280 (ZYLtech)[1][2]245 ± 10 (Prusament) — 25 °C below the carbon-fibre grade[3][11]
Bed temperature°C80–100 (Spectrum); 90–110 on PEI (ZYLtech)[1][2]95 ± 10 (Prusament)[3]
Enclosure / chamber requirement1–5Enclosure recommended[12]Enclosure recommended — Simplify3D lists an enclosure as a hardware requirement and Polymaker advises one below 70 °C ambient to stop warping and cracking[13][14]
Part cooling fan0–20 % (Spectrum)[1]Off — Prusa runs 0 % except 100 % on bridges[3]
Bed surface & adhesion aidPEI sheet, BuildTak or an adhesion aid such as Magigoo (Polymaker); Simplify3D also lists Kapton tape and ASA slurry[15][16]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][17]4 at Prusa's 50 mm/s cap on a 0.4 mm nozzle at 0.2 mm layer[3][17]
Warping tendency1–5Moderate — needs adhesion aid or draught shield[12]High — enclosure needed for reliable large parts; Prusa recommends a brim[3]
Bed-adhesion difficulty1–5Needs a specific surface plus adhesive[15]Very difficult — special plates or slurry required[3]
Stringing / oozing tendency1–5Slight — Polymaker advises 1–2 mm retraction at 20–30 mm/s[15]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]Advanced — enclosure, hardware upgrades, tuning; 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]Prusa states a hardened nozzle is necessary and recommends a brim[3]
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 GF composite[3]
Nozzle clog risk1–5Moderate — needs dry filament and a clean nozzle; Prusa lists higher risk of nozzle clogging for glass-filled composites[18]Moderate — needs dry filament and a clean nozzle; Prusa lists higher risk of nozzle clogging for glass-filled composites[18]
Heat-creep / jam sensitivity1–5Slightly sensitive[16]Not documented
Hotend requirementNo special hotend required[16]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]Low (0.1–0.3 %) — 0.11 % at both 24 h and 7 days, higher than the carbon-fibre grade's 0.04 % but still very low[3][11]
Equilibrium moisture content at ~50 % RH%Not documented0.11 after 24 h and 0.11 after 7 days at 24 °C / 22 % RH (Prusa Polymers)[3]
Symptoms when wetBubbling and popping at the nozzle, stringing and a rough surface[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]Not applicable in practice at 0.11 % equilibrium uptake[3]
Storage requirementSealed with desiccant; Polymaker rates the styrenics moderate-sensitivity[22]No special storage needed[3]
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]46.6 ± 1.3 filament tensile yield (Prusament, ISO 527) — more than double the carbon-fibre grade's 21[3][11]
Young's modulusMPa2540–2890 (ZYLtech; specimen type not stated) and 2550 (Spectrum, injection-moulded), ISO 527[2][1]Not documented
Elongation at break%3.4 at break (ZYLtech; specimen type not stated); Spectrum quotes 2.80 at yield on injection-moulded specimens[2][1]Not documented
Flexural modulusMPa2130–2480 flexural modulus, ISO 178 (ZYLtech; specimen type not stated)[2]Not documented
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]7.9 ± 0.4 printed horizontal and 9.9 ± 0.8 printed vertical XZ (ISO 179-1, notched)[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]Not documented
Brittleness1–5Brittle — snaps with little warning; elongation at break 3.4 %[2]Moderate[3]
Hardness (scale-specific)Shore A / Shore D / RockwellNot documentedRockwell R102 (and M95) on extruded unfilled PP stock (ASTM D785); no figure is published for a glass-fibre PP filament[23]
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]Not documented
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]Not documented
Elasticity / flexibility1–5Rigid[2]Rigid[3]
Thermal Properties
HDT at 0.45 MPa°C100 (Spectrum, injection-moulded, ISO 75 at 0.45 MPa)[1]138.3 (ISO 75, 0.45 MPa)[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]112.6 (ISO 75, 1.8 MPa)[3]
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[24]Not documented
Flammability / UL 94Flammable; no UL 94 rating published[19]Not documented
Environment & Chemical
UV resistance1–5Excellent — designed for permanent outdoor use; Spectrum states the parts resist prolonged UV and moisture exposure[1][25]Not documented
Chemical resistanceGood against weak acids, weak alkalis, oils and grease; dissolved by acetone[20]Excellent against acids, alkalis and most solvents[14]
Water / humidity resistance in service1–5Not documentedExcellent — essentially unaffected[3]
Food contactNot food safe[15]Not documented
Biodegradability / compostabilityNot biodegradable[15]Not documented
RecyclabilityNot accepted in household plastic collection[15]Not documented
Health & Safety
Fume toxicity1–5High — hazardous VOC such as styrene; enclosure and filtration needed[26][12]Low hazard — minimal VOC and particle emission. Inferred: no polyolefin was among the nine filaments in the Azimi chamber study, so this is a family-level judgement rather than a measurement[26]
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[12][26]Not documented
Ventilation / filtration requirement1–5Enclosure with carbon and HEPA filtration[26][12]Open a window / occasional ventilation. Inferred — no polyolefin was measured in the chamber study[26]
Dust & fibre handling hazardGlass fibre is bound in the matrix; avoid inhaling sanding dust[1]Glass fibre is bound in the matrix; avoid inhaling sanding dust[3]
Post-Processing
Sanding & machiningSands well and takes filler before painting[15]Not documented
Painting & finishingPaints readily; ASA holds colour outdoors so many parts are left unpainted[15]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[12]Not documented
Solvents & Solubility
Soluble inAcetone dissolves the resin and leaves the fibre; MEK, THF, ethyl acetate and chlorinated solvents attack the styrenic backbone.[27][20]None at room temperature; chloroform dissolves the matrix at 60 °C and xylene at about 118 °C, leaving the fibre.[28][29]
Softened or crazed byLimonene attacks some grades — Prusa reports Prusament ASA Orange flaking apart as layer adhesion fails.[30]Xylene, decalin, CCl4 and chlorobenzene are heavily absorbed at 20 °C; oleum, chlorosulphonic acid and bromine destroy it.[28]
Solvent welding & smoothing agentAcetone vapour reaches only the resin fraction, so the fibre is left standing proud of the smoothed surface.[31][20]None — nothing softens PP at room temperature, so joints have to be welded thermally rather than chemically.[28]

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 PP Glass Fiber Technical Datasheet v1.0 Prusa Polymers · 2024-11 · tds
  4. Prusament PP Glass Fiber — material page Prusa Polymers · 2026-08 · doc
  5. Filastruder product catalogue Filastruder · 2026-08 · vendor
  6. ZYLtech ASA-GF Glass Fiber filament — product page ZYLtech · 2026-08 · vendor
  7. BASF Ultrafuse PP GF30 Black 2.85 mm 2.200 g igo3d · 2026-08 · vendor
  8. BCN3D PP GF30 Black 2.85 mm 700 g igo3d · 2026-08 · vendor
  9. Prusa Prusament PP Glass Fiber Natural (NFC), 1.75 mm / 850 g 3DJAKE · 2026-08 · vendor
  10. Siraya Tech Fibreheart ASA-GF Filament product page Siraya Tech · 2026-08 · vendor
  11. Prusament PP Carbon Fiber Technical Datasheet v1.0 Prusa Polymers · 2024-11 · tds
  12. ABS / ASA / PC Usage Guide Bambu Lab Wiki · 2026-08 · doc
  13. Polypropylene — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  14. PP — material basics Polymaker Wiki · 2026-08 · doc
  15. ASA — material basics Polymaker Wiki · 2026-08 · doc
  16. ASA — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  17. Max volumetric speed Prusa Knowledge Base · 2026-08 · doc
  18. Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
  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. TECAFINE PP natural — stock shape properties Ensinger · 2026-08 · tds
  24. Prusament ASA — material page Prusa Polymers · 2026-08 · doc
  25. ASA — FDM Material Data Sheet (includes 1000 h QUV exposure results) Stratasys · 2026-08 · tds
  26. 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
  27. Chemical resistance — resistance of Ensinger plastics to chemicals (DIN 50 014, 23/50) Ensinger · 2026-08 · tds
  28. Pro-fax and Moplen polypropylene — Chemical Resistance Guide (20, 60 and 100 °C) LyondellBasell · 2026-08 · tds
  29. US 5,278,282 Polymer recycling by selective dissolution — xylene dissolution temperatures Nauman & Lynch, Rensselaer Polytechnic Institute · 1994-01 · paper
  30. HIPS — Knowledge Base Prusa Research · 2026-08 · doc
  31. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc