PEEK vs PETG
Compare PEEK and PETG filaments side-by-side. See which one is best for your 3D printing project.
PEEK
CPolyether Ether Ketone
Exceptional mechanical/thermal/chemical resistance; self-extinguishing; near metal alternative
PETG
APolyethylene Terephthalate Glycol-modified
Tougher than PLA, higher temp tolerance, more durable in real-world use
Detailed Comparison
Property
PEEK
PETG
Tier Rating
Tier C
Tier A
Family
PEEK-family
PETG
Nozzle Temp
360-450°C
215-270°C
Bed Temp
120-200°C
70-90°C
Enclosure
required
optional
Cooling
Minimal and controlled
Moderate cooling; too much cooling can hurt layer adhesion
Moisture Sensitivity
high
moderate
Strengths Comparison
PEEK Strengths
- Exceptional mechanical/thermal/chemical resistance; self-extinguishing; near metal alternative
- Extreme heat resistance, chemical resistance, and strength
PETG Strengths
- Tougher than PLA, higher temp tolerance, more durable in real-world use
- Good clarity and low friction among easy-to-print materials
Considerations
PEEK Caveats
- Extremely expensive (~$700/kg) and very difficult to print; warping/curling issues
PETG Caveats
- Overhangs/bridges sag; supports can be hard to remove
- Absorbs water fairly quickly
Frequently Asked Questions
Is PEEK or PETG better for 3D printing?
PETG is generally rated higher (Tier A) compared to PEEK (Tier C). However, the best choice depends on your specific needs: PEEK is best for Exceptional mechanical/thermal/chemical resistance; self-extinguishing; near metal alternative, while PETG is best for Tougher than PLA, higher temp tolerance, more durable in real-world use.
What are the temperature differences between PEEK and PETG?
PEEK prints at 360-450°C nozzle / 120-200°C bed. PETG prints at 215-270°C nozzle / 70-90°C bed.
Do PEEK and PETG need an enclosure?
PEEK: required. PETG: optional.
Which is more beginner-friendly: PEEK or PETG?
PETG is more beginner-friendly as it doesn't require an enclosure.