3D Printing Info

Filament comparison

ASA-GF vs Magnetic

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

Glass-fibre ASA (ASA-GF) guideMagnetic filament guide

2 selected · all documented properties

Open these two in the interactive comparisonMore ASA-GF comparisonsMore Magnetic comparisons
ASA-GF vs Magnetic — documented properties and sources
PropertyGlass-fibre ASA (ASA-GF)ASAMagnetic filamentSPECIALTY
Market snapshot
Listing priceUSD/kg; dated snapshots$29.95/kg median; $26.99–$33.99/kg across 3 dated product listings$64.99/kg median; $64.99–$64.99/kg across 1 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]PLA loaded with ferromagnetic iron powder, so printed parts respond to magnets[3]
Densityg/cm³1.07 (ZYLtech) and 1.11 (Spectrum), ISO 1183[1][2]About 1.85 (Proto-pasta manufacturer figure) — 1.5× standard PLA[3]
Typical priceUSD/kg1 kg spools cluster near 28[4][5]1 kg spools cluster near 65[6]
Price range across brandsUSD/kg27–34 across brands; Ambrosia 27, ZYLtech 30, Siraya Tech 34[4][5][7]64–70 across formats; 1 kg spool 65, 500 g 70, 2 kg 70[6]
Market availability1–5Niche, a handful of specialist brands[4][1][2]Niche, a handful of specialist brands[6]
Spool sizes & diameters1.75 and 2.85 mm; 1 kg spools[2][4]1.75 and 2.85 mm; 0.1, 0.5, 1 and 2 kg spools[6]
Typical applicationsOutdoor brackets and mounts that need stiffness and dimensional stability under sun and moisture[1][2]Sensor targets, magnetic fixtures, and props that need to stick to a magnet or rust deliberately[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]192 (Proto-pasta)[3]
Bed temperature°C80–100 (Spectrum); 90–110 on PEI (ZYLtech)[1][2]60 (Proto-pasta)[3]
Enclosure / chamber requirement1–5Enclosure recommended[8]Open frame is fine[3]
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[9][10]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][11]1.6–2.4 at Proto-pasta's 20–30 mm/s on a 0.4 mm nozzle at 0.2 mm layer[3]
Warping tendency1–5Moderate — needs adhesion aid or draught shield[8]Not documented
Bed-adhesion difficulty1–5Needs a specific surface plus adhesive[9]Not documented
Stringing / oozing tendency1–5Slight — Polymaker advises 1–2 mm retraction at 20–30 mm/s[9]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]Intermediate — dry filament and a tuned profile; slow, and brittle in filament form[3]
Extruder requirementZYLtech specifies a hardened nozzle 0.6 mm or larger; Spectrum bases its settings on a 0.5 mm nozzle[2][1]Proto-pasta advises an extrusion width 0.05 mm larger than the nozzle and warns feeding is inconsistent below 0.4 mm and on Bowden machines[3]
Hardware Wear & Reliability
Nozzle hardness required1–4Hardened steel required — Spectrum recommends ruby or hardened, ZYLtech requires hardened[1][2]Brass acceptable; hardened steel for volume work[3]
Abrasiveness1–5Highly abrasive — standard GF composite[1][2]Moderately abrasive — metal fill[3]
Nozzle clog risk1–5Moderate — needs dry filament and a clean nozzle; Prusa lists higher risk of nozzle clogging for glass-filled composites[12]Moderate — needs dry filament and a clean nozzle; Prusa lists metal-filled composites as a higher clogging risk and recommends a 0.6 mm nozzle minimum[13]
Heat-creep / jam sensitivity1–5Slightly sensitive[10]Not documented
Hotend requirementNo special hotend required[10]Proto-pasta recommends a wear-resistant or larger nozzle for longer service intervals[3]
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[14][15][16]Not documented
Symptoms when wetBubbling and popping at the nozzle, stringing and a rough surface[17]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[17]Polymaker rates PLA low-sensitivity and publishes no dry-versus-conditioned figures; absorbed water flashes to steam and shows as bubbling and poor layer adhesion[17]
Storage requirementSealed with desiccant; Polymaker rates the styrenics moderate-sensitivity[17]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]Not documented
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]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]Not documented
Brittleness1–5Brittle — snaps with little warning; elongation at break 3.4 %[2]Brittle — Proto-pasta describes the filament as more brittle than standard PLA and needing extra care in handling[3]
Creep resistance / sustained load1–5Good — no creep test found; chopped glass fibre lifts modulus to 2540–2890 against 2379–2450 for unfilled ASA[2][15][14]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][15][14]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]Not documented
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]Not documented
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[18]Not documented
Flammability / UL 94Flammable; no UL 94 rating published[14]Not documented
Environment & Chemical
UV resistance1–5Excellent — designed for permanent outdoor use; Spectrum states the parts resist prolonged UV and moisture exposure[1][19]Not documented
Outdoor durabilityNot documentedDeliberately rustable — Proto-pasta markets the iron content as oxidising when exposed to moisture[3]
Chemical resistanceGood against weak acids, weak alkalis, oils and grease; dissolved by acetone[15]Not documented
Food contactNot food safe[9]Not documented
Biodegradability / compostabilityNot biodegradable[9]Not documented
RecyclabilityNot accepted in household plastic collection[9]Not documented
Electrical & ESD propertiesNot documentedFerromagnetic: Proto-pasta states it responds to magnets and behaves similarly to pure iron[3]
Health & Safety
Fume toxicity1–5High — hazardous VOC such as styrene; enclosure and filtration needed[20][8]Low hazard — minimal VOC and particle emission; none of these materials was in the chamber study[20]
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[8][20]Not documented
Ventilation / filtration requirement1–5Enclosure with carbon and HEPA filtration[20][8]Open a window / occasional ventilation[20]
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[9]Polishing and deliberate rusting are the intended finishes[3]
Painting & finishingPaints readily; ASA holds colour outdoors so many parts are left unpainted[9]Not documented
Gluing & solvent weldingSolvent-welds with acetone[15]Not documented
Vapour / chemical smoothingAcetone vapour smoothing works[15]Not documented
Support material pairingHIPS breaks away or dissolves in d-limonene; Bambu Lab sells a Support for ABS that also serves ASA[8]Not documented
Solvents & Solubility
Soluble inAcetone dissolves the resin and leaves the fibre; MEK, THF, ethyl acetate and chlorinated solvents attack the styrenic backbone.[21][15]Chloroform dissolves the PLA matrix and leaves the iron powder behind; laboratory reagent, not workshop stock.[22][3]
Softened or crazed byLimonene attacks some grades — Prusa reports Prusament ASA Orange flaking apart as layer adhesion fails.[23]Acetone and ethyl acetate plasticise the matrix rather than dissolving it; water attacks the exposed iron.[22][3]
Solvent welding & smoothing agentAcetone vapour reaches only the resin fraction, so the fibre is left standing proud of the smoothed surface.[24][15]None — PLA has no workshop-safe solvent, and the iron loading blocks the surface flow smoothing needs.[22]

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. Magnetic Iron PLA — product page and technical data Proto-pasta · 2026-08 · tds
  4. Filastruder product catalogue Filastruder · 2026-08 · vendor
  5. ZYLtech ASA-GF Glass Fiber filament — product page ZYLtech · 2026-08 · vendor
  6. Proto-pasta product catalogue Proto-pasta · 2026-08 · vendor
  7. Siraya Tech Fibreheart ASA-GF Filament product page Siraya Tech · 2026-08 · vendor
  8. ABS / ASA / PC Usage Guide Bambu Lab Wiki · 2026-08 · doc
  9. ASA — material basics Polymaker Wiki · 2026-08 · doc
  10. ASA — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  11. Max volumetric speed Prusa Knowledge Base · 2026-08 · doc
  12. Composite materials filled with carbon, kevlar or glass Prusa Knowledge Base · 2026-08 · doc
  13. Composite materials with metal or wood particles Prusa Knowledge Base · 2026-08 · doc
  14. Bambu Filament Technical Data Sheet V3.0 — ASA Bambu Lab · 2026-08 · tds
  15. PolyLite ASA Technical Data Sheet Polymaker · 2024-11 · tds
  16. Prusament ASA Technical Datasheet v1.1 Prusa Polymers · 2024-05 · tds
  17. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  18. Prusament ASA — material page Prusa Polymers · 2026-08 · doc
  19. ASA — FDM Material Data Sheet (includes 1000 h QUV exposure results) Stratasys · 2026-08 · tds
  20. 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
  21. Chemical resistance — resistance of Ensinger plastics to chemicals (DIN 50 014, 23/50) Ensinger · 2026-08 · tds
  22. Solubility Study of Ingeo Biopolymer Grades in Common Organic Solvents (NWPD003) NatureWorks · 2019-10 · tds
  23. HIPS — Knowledge Base Prusa Research · 2026-08 · doc
  24. Improve your 3D prints with chemical smoothing Prusa Research · 2026-08 · doc