PC vs Nylon vs PETG: Strength, Temperature Resistance and Cost Trade-offs

Tensile Strength: Are They Really That Different?

When you look at the averages across all unfilled grades in our database, the gap between these three materials is narrower than most people expect:

• PC: 40–73 MPa, average 62 MPa (29 materials)
• PA (Nylon): 36–96 MPa, average 62 MPa (33 materials)
• PETG: 22–73 MPa, average 46 MPa (81 materials)

PC and Nylon have essentially identical average tensile strength — but the distributions tell a different story. Nylon's range extends higher (up to 96 MPa for some PA612 grades like Fiberon PA612-ESD at 84.3 MPa), while PC clusters more tightly around the 55–68 MPa range. 3DXTech 3DXSTAT ESD-PC hits 68 MPa and Anycubic PC reaches 65 MPa, while workhorse grades like Bambu Lab PC sit at 55 MPa with an HDT of 117°C.

PETG underperforms both by roughly 25% on average. AzureFilm PETG Original (56.7 MPa) and 3DJAKE easyPETG (53 MPa) are among the stronger PETG grades, but they still trail the mid-pack PC and Nylon options.

Toughness: Where Nylon Pulls Ahead

Tensile strength measures how hard a material is to pull apart — but toughness (the ability to absorb impact without fracturing) is often what matters more for functional parts. Elongation at break is the clearest proxy, and here the three materials diverge dramatically:

• PA (Nylon): average elongation 39%, range 1.2–180%. 3DXTech AmideX Nylon 6-66 reaches 100% elongation before breaking, meaning it stretches to twice its original length before failure.
• PETG: average elongation 46%, range 1.9–400% (though most practical grades fall in the 6–15% range; the high outliers are specialty soft grades).
• PC: average elongation 28%, range 2.4–220%. Most pure PC grades fall in the 3–14% range — 3DXTech ezPC at 14% and Anycubic PC at 9% are more ductile than typical PC.

For snap-fit clips, hinges, gears, or any part that experiences repeated bending or impact, Nylon's inherent toughness is a genuine advantage. PC is brittle by comparison, despite its higher heat resistance. PETG falls in the middle — more forgiving than PC but less reliably tough than well-dried Nylon.

Heat Deflection Temperature: PC Wins Clearly

This is where polycarbonate earns its "engineering filament" label. HDT values from our database:

• PC: 101–141°C across 24 materials with HDT data, average 116°C. 3DXTech 3DXMAX PC (HDT 135°C), Bambu Lab PC (117°C), and Elegoo PC (109°C) cover the practical range.
• PA (Nylon): 50–157°C across 27 materials with HDT data, average 101°C. High-performance grades like Fiberon PA612-ESD (157°C) and 3DXTech WearX Nylon (143°C) approach PC, but common PA6 grades (e.g., 3DXTech ION PA6 Alloy at 97°C) are closer to PETG.
• PETG: 58–100°C across 39 materials with HDT data, average 70°C. 3DXTech ESD-PETG (75°C) and AzureFilm PETG Original (73°C) are typical. PETG will soften noticeably in a closed car in summer — a car's interior can exceed 70°C.

If your part needs to survive near an engine, in a car interior, or in any environment above 80°C, PETG is simply not the right material. PA with a strong grade and PC are the viable options.

Printability: The Real Cost of Engineering Filaments

The "cost" comparison between these three materials goes beyond spool price. Printability directly determines the printer requirements and failure rate — which has real time and material cost implications.

PETG: The Approachable Choice

PETG is by far the easiest of the three. Print temps in our database range from 195–290°C but most grades cluster at 220–260°C — within reach of every FDM printer on the market. Bed temps from 60–90°C are standard on mid-range machines. No enclosure is required. Moisture sensitivity is moderate; a 4–6 hour dry at 65°C before printing is recommended for best results, but PETG is far less punishing than Nylon if you skip it.

Nylon: Printable but Moisture-Critical

PA requires more attention. Print temps across our database span 220–300°C, with most grades landing at 250–280°C. 3DXTech AmideX Nylon 6-66 prints at 270°C with a 80°C bed; 3DXTech WearX Nylon runs 260–275°C with 80–95°C bed. An enclosure is strongly recommended to prevent warping on larger parts. The bigger issue is hygroscopicity: Nylon absorbs moisture from the air rapidly, and wet Nylon stringing, foaming, and weak layer adhesion are among the most frustrating 3D printing experiences. Always print from a dry box or dry filament immediately after drying at 80–90°C for 12+ hours.

Polycarbonate: Demanding but Achievable

PC is the most demanding of the three. Print temps in our database range from 240–400°C, with serious PC grades requiring 275–295°C. 3DXTech 3DXMAX PC prints at 275–295°C with a 110–120°C bed. 3DXTech ESD-PC requires 295°C and a 130°C bed. Bambu Lab PC sits at the accessible end at 260–280°C with a 90–110°C bed — still above what many entry-level printers can achieve on the bed. An enclosure is essential for PC; ambient temperature significantly affects warping and layer adhesion. PC also warps aggressively without a PEI or PC-specific adhesive surface.

Side-by-Side Comparison

Here are the key differences at a glance — based on median values across materials in our database with available data:

Where Each Material Makes Sense

Choose PETG When:

• You need functional parts without upgrading your printer — PETG works at 220–260°C nozzle with any standard heated bed
• The part won't exceed ~65–70°C in service (enclosures, brackets, cases, light-duty clips)
• You want good chemical resistance and moisture resistance without the printability demands of PA or PC
• Print-and-forget workflow — moderate moisture sensitivity means you can leave it on the shelf without a dry box
• Cost is a constraint — PETG is widely available and generally the least expensive of the three

Choose Nylon (PA) When:

• Toughness and impact resistance matter more than heat resistance — PA's elongation (up to 100%+ for some grades) makes it genuinely hard to snap
• You're printing wear-resistant parts: bushings, gears, cams, sliding components (PA has inherent lubricity)
• Temperature resistance up to 97–157°C is needed but you can't meet PC's printer requirements
• You have a dry box or can dry filament immediately before printing — Nylon's moisture sensitivity is manageable but non-negotiable
• Lightweight stiffness matters: most PA grades have density ~1.06–1.14 g/cm³, lighter than PC (~1.2 g/cm³)

Choose PC When:

• You need the highest heat resistance in this group — HDT averaging 116°C, with grades like 3DXTech 3DXMAX PC at 135°C
• Optical clarity is required — PC's natural transparency is unmatched by PETG or PA in print quality
• You have a printer capable of 260–295°C nozzle, 90–140°C bed, and an enclosure
• The part is structural and will see sustained heat — electrical housings, light fixtures, automotive mounts
• You want the best strength-to-heat-resistance ratio among accessible engineering filaments

The True Cost Picture

Filament price data is not yet fully populated in our database for these families, but the market pricing pattern is well-established: PETG is typically the cheapest per kg, Nylon sits in the mid-range (and requires dry storage costs in practice), and PC is the most expensive. However, the real cost differential comes from printer compatibility: PC's need for a hardened steel nozzle (it can wear brass quickly at 280–295°C), high bed temps that demand a PEI sheet or specialty adhesive, and enclosure requirements mean the upfront hardware investment is substantial. For PETG, any standard FDM printer is sufficient. For Nylon, a reliable heated bed (80–100°C) and dry box add modest cost. Factor these into your total cost of ownership, not just spool price.

Our Data Coverage Note

Our Nylon dataset (33 unfilled materials) is smaller than PETG (81 materials) and skews toward specialty grades from brands like 3DXTech and Bambu Lab. Consumer PA6 grades may print at lower temperatures than our database averages suggest. Our PC dataset (29 materials) includes both mainstream consumer grades (Bambu Lab, Elegoo, Anycubic) and industrial grades (3DXTech), which inflates the average temperature and HDT ranges. When choosing a specific product, always verify the manufacturer's TDS for your exact grade.