PEEK vs Polycarbonate

Compare PEEK and Polycarbonate filaments side-by-side so you can pick the right one for your 3D printing project.

PEEK vs Polycarbonate: PEEK is known for exceptional mechanical/thermal/chemical resistance, while Polycarbonate is known for very tough and stiff. Both have required enclosure requirements; PEEK prints at higher nozzle temperatures (360-450°C vs 260-310°C). Choose PEEK for exceptional mechanical/thermal/chemical resistance, or Polycarbonate for very tough and stiff.

Key differences at a glance

Property
PEEK
Polycarbonate
Nozzle temp
360-450°C
260-310°C
Bed temp
120-200°C
90-120°C
Enclosure needed
Required
Required
Ease of printing
Difficult
Difficult
Moisture sensitivity
high
high

PEEK

C

Polyether Ether Ketone

Exceptional mechanical/thermal/chemical resistance; self-extinguishing; near metal alternative

Polycarbonate

B

PC

Very tough and stiff; doesn't shatter like PLA

Detailed Comparison

Property
PEEK
Polycarbonate
Tier Rating
Tier C
Tier B
Family
PEEK-family
PC
Nozzle Temp
360-450°C
260-310°C
Bed Temp
120-200°C
90-120°C
Enclosure
required
required
Cooling
Minimal and controlled
Low cooling
Moisture Sensitivity
high
high

Green marks the generally easier or more forgiving option in that row, based on tier, enclosure needs, and moisture sensitivity. It is not always the better choice for a specific job, so weigh it against what your project actually needs.

Strengths Comparison

PEEK Strengths

  • Exceptional mechanical/thermal/chemical resistance; self-extinguishing; near metal alternative
  • Extreme heat resistance, chemical resistance, and strength

Polycarbonate Strengths

  • Very tough and stiff; doesn't shatter like PLA
  • High heat resistance (~150C softening region)

Considerations

PEEK Caveats

  • Extremely expensive and very difficult to print; warping/curling issues (pricing varies widely by brand, so verify current pricing)

Polycarbonate Caveats

  • Often overkill and high effort for typical use

Frequently Asked Questions

What is the difference between PEEK and Polycarbonate?
PEEK prints at 360-450°C nozzle / 120-200°C bed (Required enclosure, high moisture sensitivity). Polycarbonate prints at 260-310°C nozzle / 90-120°C bed (Required enclosure, high moisture sensitivity).
Is PEEK or Polycarbonate stronger?
Our dataset does not include comparable tensile strength values for both. Qualitatively, PEEK is suited to exceptional mechanical/thermal/chemical resistance, while Polycarbonate is suited to very tough and stiff.
Which prints at a higher temperature, PEEK or Polycarbonate?
PEEK prints at a higher temperature (360-450°C nozzle vs 260-310°C for Polycarbonate).
Is PEEK or Polycarbonate better for beginners?
Both are similarly approachable: PEEK (required enclosure, high moisture) and Polycarbonate (required enclosure, high moisture).
Should I use PEEK or Polycarbonate for everyday prints?
For everyday prints, PEEK is usually the better fit (Exceptional mechanical/thermal/chemical resistance). Choose Polycarbonate instead when very tough and stiff.

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