3D Printing Info

Filament comparison

Magnetic vs PA6-GF

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

Magnetic filament guideGlass-fibre PA6 (PA6-GF) guide

2 selected · all documented properties

Open these two in the interactive comparisonMore Magnetic comparisonsMore PA6-GF comparisons
Magnetic vs PA6-GF — documented properties and sources
PropertyMagnetic filamentSPECIALTYGlass-fibre PA6 (PA6-GF)PA
Market snapshot
Listing priceUSD/kg; dated snapshots$64.99/kg median; $64.99–$64.99/kg across 1 dated product listings$59.98/kg median; $39.99–$130.00/kg across 6 dated product listings
Identity & Market
Base polymer / chemistryPLA loaded with ferromagnetic iron powder, so printed parts respond to magnets[1]PA6 reinforced with chopped glass fibre — Polymaker's grade is 25 wt%[2][3]
Densityg/cm³About 1.85 (Proto-pasta manufacturer figure) — 1.5× standard PLA[1]1.14 (Bambu Lab) and 1.20 (Polymaker Fiberon), ISO 1183[3][2]
Typical priceUSD/kg1 kg spools cluster near 65[4]1 kg-equivalent spools span 40–130; the middle of the market is about 60[3][5][6]
Price range across brandsUSD/kg64–70 across formats; 1 kg spool 65, 500 g 70, 2 kg 70[4]40–130 across brands; SUNLU 40, YXPOLYER 45, Polymaker Fiberon and Bambu Lab 60, 3DXTech FibreX 87, Obsidian Nylon 6+GF 130[5][3][7][6][8]
Market availability1–5Niche, a handful of specialist brands[4]Stocked by most mainstream brands[3][5][7][6][8]
Spool sizes & diameters1.75 and 2.85 mm; 0.1, 0.5, 1 and 2 kg spools[4]1.75 and 2.85 mm; 0.5, 0.75 and 1 kg spools[5][7][3]
Typical applicationsSensor targets, magnetic fixtures, and props that need to stick to a magnet or rust deliberately[1]Stiff, heat-resistant structural parts where a matte finish and lower cost beat carbon fibre[3][2]
Printing Parameters
Nozzle temperature°C192 (Proto-pasta)[1]260–290 (Bambu Lab)[3]
Bed temperature°C60 (Proto-pasta)[1]Not documented
Enclosure / chamber requirement1–5Open frame is fine[1]Enclosure required (passive) — Bambu Lab specifies a 45–60 °C chamber[3]
Recommended chamber temperature°CNot documented45–60 (Bambu Lab)[3]
Bed surface & adhesion aidNot documentedPEI sheet with a glue stick, or a dedicated adhesive such as Magigoo[9][10]
Maximum volumetric flow (mm³/s; see test conditions)mm³/s1.6–2.4 at Proto-pasta's 20–30 mm/s on a 0.4 mm nozzle at 0.2 mm layer[1]10 at Bambu Lab's 130 mm/s cap on a 0.4 mm nozzle at 0.2 mm layer[3][11]
Bed-adhesion difficulty1–5Not documentedNeeds a specific surface plus adhesive[9]
Stringing / oozing tendency1–5Not documentedModerate — retraction tuning needed[10]
Overall printing difficulty1–5Intermediate — dry filament and a tuned profile; slow, and brittle in filament form[1]Expert / industrial hardware only[3][12]
Extruder requirementProto-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[1]0.6 mm nozzle recommended by Bambu Lab; 0.4 and 0.8 also supported[3]
Hardware Wear & Reliability
Nozzle hardness required1–4Brass acceptable; hardened steel for volume work[1]Hardened steel required — Polymaker measures brass nozzle life at about 9 h on PA6-GF25 and recommends hardened steel or ruby[2]
Abrasiveness1–5Moderately abrasive — metal fill[1]Highly abrasive — standard GF composite; Polymaker puts brass nozzle life at roughly 9 h on PA6-GF25[2]
Nozzle clog risk1–5Moderate — 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]Very high — frequent jams without careful setup[12]
Heat-creep / jam sensitivity1–5Not documentedModerate — good heatbreak cooling needed[9]
Hotend requirementProto-pasta recommends a wear-resistant or larger nozzle for longer service intervals[1]May require an all-metal hot end (Simplify3D)[9]
Moisture Behaviour
Moisture absorption (hygroscopicity)1–5Not documentedVery high (>2 %) — 2.56 % saturated at 25 °C / 55 % RH (Bambu Lab) and 3.33 % equilibrium (Polymaker Fiberon), the highest in the dataset[3][2]
Equilibrium moisture content at ~50 % RH%Not documented2.56 saturated at 25 °C / 55 % RH (Bambu Lab); 3.33 equilibrium (Polymaker Fiberon PA6-GF25)[3][2]
Drying temperature & timeNot documented80 °C for 8–12 h (Bambu Lab)[3]
Symptoms when wetNot documentedPopping and cracking during extrusion, then hard-to-diagnose defects[14]
Effect of moisture on strengthPolymaker rates PLA low-sensitivity and publishes no dry-versus-conditioned figures; absorbed water flashes to steam and shows as bubbling and poor layer adhesion[12]Polymaker publishes dry and wet printed blocks for PA6-GF25 itself: at 4.57 % moisture tensile falls 80.1 → 40.2 MPa and modulus 5357 → 1794 MPa, while notched Charpy rises 10.0 → 28.0 kJ/m²[2][14]
Storage requirementNot documentedSealed below 20 % RH with desiccant[12]
Hydrolysis at melt temperatureNot documentedPolymaker specifies an 80–100 °C dry and storage below 20 % RH; no molecular-weight loss figure is published, and the wet data it does publish is conditioning rather than melt hydrolysis[15][16]
Mechanical Properties
Tensile strength (XY)MPaNot documented75 ± 6 (Bambu Lab) and 80.1 ± 1.8 (Polymaker Fiberon, dry/annealed) printed XY, ISO 527; Fiberon falls to 40.2 ± 2.1 conditioned to 4.57 % moisture. Stratasys FDM PA6/66-GF30-FR gives 60.2-61.1 at break and 61.7-62.3 at yield printed XZ (ASTM D638)[3][2][17]
Young's modulusMPaNot documented2850 ± 260 (Bambu Lab) and 5357 ± 211 (Polymaker Fiberon, dry) printed XY, ISO 527; Fiberon falls to 1794 ± 84 conditioned. Stratasys FDM PA6/66-GF30-FR gives 5600-5830 printed XZ against 3050-3140 in ZX (ASTM D638)[3][2][17]
Elongation at break%Not documented2.4 ± 0.2 dry (Polymaker Fiberon) to 3.9 ± 0.8 (Bambu Lab) printed XY, ISO 527; the Fiberon grade rises to 4.2 ± 0.7 conditioned[3][2]
Flexural modulusMPaNot documented3670 ± 140 printed XY, ISO 178 (Bambu Lab)[3]
Charpy impact, notchedkJ/m²Not documented10.0 ± 0.7 printed XY dry and 28.0 ± 1.0 conditioned, ISO 179 notched (Polymaker Fiberon); Bambu Lab 7.2 ± 2.3[2][3]
Other impact dataNot documentedCharpy unnotched 27.2 ± 2.2 printed XY (Bambu Lab, ISO 179). Stratasys FDM PA6/66-GF30-FR gives Izod notched 74.6-77.1 J/m printed XZ against 17.2-22.1 in ZX (ASTM D256)[3][17]
Layer adhesion / Z tensileMPaNot documented27 ± 5 (Bambu Lab) and 60.7 ± 1.1 (Polymaker Fiberon, dry) printed Z, ISO 527 — the two makers differ by more than a factor of two; Fiberon falls to 26.3 ± 1.5 conditioned. Stratasys FDM PA6/66-GF30-FR gives 23.7-24.4 at break printed ZX (ASTM D638)[3][2][17]
Brittleness1–5Brittle — Proto-pasta describes the filament as more brittle than standard PLA and needing extra care in handling[1]Brittle — snaps with little warning; elongation at break 2.4 % in XY[2]
Hardness (scale-specific)Shore A / Shore D / RockwellNot documentedRockwell M88 / R117 on extruded PA66-GF30 stock (ASTM D785)[18]
Creep resistance / sustained load1–5Not documentedGood. Ensinger lists high creep resistance as a headline property of extruded PA66-GF30 stock; the rating is held below Excellent because equilibrium moisture uptake of 3.33 % softens the matrix in service[18][2]
Fatigue / repeated-flex resistance1–5Not documentedGood. Ensinger lists high fatigue strength as a headline property of extruded PA66-GF30 stock[18]
Elasticity / flexibility1–5Rigid[1]Rigid[3]
Z strength as % of XY%Not documented36 (Bambu Lab) to 76 (Polymaker Fiberon), printed; Stratasys FDM PA6/66-GF30-FR gives 39-41 (ZX against XZ tensile at break, ASTM D638)[3][2][17]
Thermal Properties
HDT at 0.45 MPa°CNot documented182 (Bambu Lab) and 191 (Polymaker Fiberon), ISO 75 at 0.45 MPa. Stratasys FDM PA6/66-GF30-FR gives 161 printed XY and 185 XZ (ASTM D648 at 66 psi)[3][2][17]
HDT at 1.8 MPa°CNot documented157 (Polymaker Fiberon) and 158 (Bambu Lab), ISO 75 at 1.8 MPa[3][2]
Glass transition (Tg)°CNot documented67 (Bambu Lab) and 70.4 (Polymaker Fiberon), DSC; Stratasys measures 51.5 on FDM PA6/66-GF30-FR (ASTM D7426)[3][2][17]
Melting point / Vicat°CNot documented214.5 (Polymaker Fiberon) and 219 (Bambu Lab) melting, DSC; Vicat 210–212 (ISO 306)[3][2]
Thermal expansion (CTE)µm/m·KNot documented48.6 on extruded PA66-GF30 stock (ASTM D696; source states 2.7e-5 in/in/°F). Stratasys measures much higher on printed FDM PA6/66-GF30-FR — 95.4 over -20 to 5 °C and 214 over 25 to 80 °C in XY (ASTM E831)[18][17]
Flammability / UL 94Not documentedFlammable; no UL 94 rating published for the grades surveyed[15]
Environment & Chemical
UV resistance1–5Not documentedMonths outdoors before embrittlement — unstabilised polyamide yellows under UV[10]
Outdoor durabilityDeliberately rustable — Proto-pasta markets the iron content as oxidising when exposed to moisture[1]Not documented
Chemical resistanceNot documentedWithstands oils, fuels and alkalis[10]
Water / humidity resistance in service1–5Not documentedAbsorbs water, properties shift[14]
Food contactNot documentedNot food-contact certified as filament[10]
Biodegradability / compostabilityNot documentedNot biodegradable[10]
RecyclabilityNot documentedNot accepted in household plastic collection[10]
Electrical & ESD propertiesFerromagnetic: Proto-pasta states it responds to magnets and behaves similarly to pure iron[1]Surface resistivity above 10¹² ohm — insulating (Polymaker Fiberon, ANSI/ESD S11.11)[2]
Health & Safety
Fume toxicity1–5Low hazard — minimal VOC and particle emission; none of these materials was in the chamber study[19]Moderate — measurable VOCs and UFPs, ventilation advised[19]
VOC emission rateµg/minNot documentedUp to 180 caprolactam, the dominant VOC from nylon and the largest single-VOC rate in the study[19]
Ultrafine-particle emission rateparticles/minNot documented≈2 × 10⁸ median for nylon — low for particles despite the highest VOC mass measured[19]
Hazardous species emittedNot documentedCaprolactam, at up to 180 µg/min from nylon filament[19]
Ventilation / filtration requirement1–5Open a window / occasional ventilation[19]Ventilated room or enclosure recommended[19]
Dust & fibre handling hazardNot documentedGlass fibre is bound in the matrix; avoid inhaling sanding dust[2]
Post-Processing
Sanding & machiningPolishing and deliberate rusting are the intended finishes[1]Sands poorly — gums rather than powders[9]
Gluing & solvent weldingNot documentedCyanoacrylate; no common solvent welds polyamide[9]
Vapour / chemical smoothingNot documentedNo practical vapour smoothing[9]
Solvents & Solubility
Soluble inChloroform dissolves the PLA matrix and leaves the iron powder behind; laboratory reagent, not workshop stock.[20][1]Formic acid, phenol, m-cresol and hexafluoroisopropanol dissolve the matrix at 23 °C, leaving the fibre; laboratory reagents.[21]
Softened or crazed byAcetone and ethyl acetate plasticise the matrix rather than dissolving it; water attacks the exposed iron.[20][1]Zinc chloride solutions stress-crack the nylon matrix, alcoholic calcium chloride dissolves it, mineral acids attack it.[21]
Solvent welding & smoothing agentNone — PLA has no workshop-safe solvent, and the iron loading blocks the surface flow smoothing needs.[20]None — nylon's only solvents (formic acid, phenol, HFIP) degrade the part, and the fibre blocks surface flow anyway.[21]

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. Magnetic Iron PLA — product page and technical data Proto-pasta · 2026-08 · tds
  2. Fiberon PA6-GF25 Technical Data Sheet V1.1 Polymaker · 2024-12 · tds
  3. Bambu Filament Technical Data Sheet — PA6-GF Bambu Lab · 2026-08 · tds
  4. Proto-pasta product catalogue Proto-pasta · 2026-08 · vendor
  5. Polymaker product catalogue Polymaker · 2026-08 · vendor
  6. SUNLU Nylon-6 Glass Fiber (PA6-GF) 3D Printer Filament 1 kg — product page SUNLU · 2026-08 · vendor
  7. 3DXTech product catalogue 3DXTech · 2026-08 · vendor
  8. YXPOLYER PA6-GF Black 1 kg — product page YXPOLYER · 2026-08 · vendor
  9. Nylon — Ultimate 3D Printing Materials Guide Simplify3D · 2026-08 · doc
  10. PA (Nylon) — material basics Polymaker Wiki · 2026-08 · doc
  11. Max volumetric speed Prusa Knowledge Base · 2026-08 · doc
  12. Wet Filament — signs, causes and drying Polymaker Wiki · 2026-08 · doc
  13. Composite materials with metal or wood particles Prusa Knowledge Base · 2026-08 · doc
  14. Moisture Conditioning — effect on printed nylon properties Polymaker Wiki · 2026-08 · doc
  15. Fiberon PA6-CF20 Technical Data Sheet V1.1 Polymaker · 2024-12 · tds
  16. PolyMide CoPA Technical Data Sheet V5.4 (dry and wet status blocks) Polymaker · 2024-11 · tds
  17. FDM PA6/66-GF30-FR — Material Data Sheet Stratasys · 2026-07 · tds
  18. TECAMID 66 GF30 black (PA66-GF30) — stock shape properties Ensinger · 2026-08 · tds
  19. 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
  20. Solubility Study of Ingeo Biopolymer Grades in Common Organic Solvents (NWPD003) NatureWorks · 2019-10 · tds
  21. Ultramid Nylon Chemical Resistance guide (unmodified PA6 B27E and PA66 A27E) BASF · 2026-08 · tds