PEEK vs PLA
Compare PEEK and PLA filaments side-by-side so you can pick the right one for your 3D printing project.
PEEK
CPolyether Ether Ketone
Exceptional mechanical/thermal/chemical resistance; self-extinguishing; near metal alternative
PLA
APolylactic Acid
Easiest to print, cheap, widely available, fast, good bridges/overhangs, easy support removal
Detailed Comparison
Property
PEEK
PLA
Tier Rating
Tier C
Tier A
Family
PEEK-family
PLA
Nozzle Temp
360-450°C
190-220°C
Bed Temp
120-200°C
50-60°C
Enclosure
required
not needed
Cooling
Minimal and controlled
High part cooling usually beneficial
Moisture Sensitivity
high
moderate
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
PLA Strengths
- Easiest to print, cheap, widely available, fast, good bridges/overhangs, easy support removal
- Stiff non-composite thermoplastic, good tensile strength
Considerations
PEEK Caveats
- Extremely expensive and very difficult to print; warping/curling issues (pricing varies widely by brand, so verify current pricing)
PLA Caveats
- Creeps under sustained load
- Poor heat resistance, UV degradation, can shatter on drops
- Not great for sanding/gluing/painting/touch-ups
Frequently Asked Questions
Is PEEK or PLA better for 3D printing?
PLA 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 PLA is best for Easiest to print, cheap, widely available, fast, good bridges/overhangs, easy support removal.
What are the temperature differences between PEEK and PLA?
PEEK prints at 360-450°C nozzle / 120-200°C bed. PLA prints at 190-220°C nozzle / 50-60°C bed.
Do PEEK and PLA need an enclosure?
PEEK: required. PLA: not needed.
Which is more beginner-friendly: PEEK or PLA?
PLA is more beginner-friendly as it doesn't require an enclosure.