PSU vs PETG
Compare PSU and PETG filaments side-by-side. See which one is best for your 3D printing project.
PSU
BPolysulfone
Very high heat resistance (Tg ~187C) and retains strength near that range
PETG
APolyethylene Terephthalate Glycol-modified
Tougher than PLA, higher temp tolerance, more durable in real-world use
Detailed Comparison
Property
PSU
PETG
Tier Rating
Tier B
Tier A
Family
PSU
PETG
Nozzle Temp
340-380°C
215-270°C
Bed Temp
140-180°C
70-90°C
Enclosure
required
optional
Cooling
Low cooling
Moderate cooling; too much cooling can hurt layer adhesion
Moisture Sensitivity
moderate
moderate
Strengths Comparison
PSU Strengths
- Very high heat resistance (Tg ~187C) and retains strength near that range
- Resists water/radiation/chemicals; can be sterilized
- Enables 'citizen science' type projects
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
PSU Caveats
- Often nylon is a better overall choice unless you need the heat/sterilization envelope
PETG Caveats
- Overhangs/bridges sag; supports can be hard to remove
- Absorbs water fairly quickly
Frequently Asked Questions
Is PSU or PETG better for 3D printing?
PETG is generally rated higher (Tier A) compared to PSU (Tier B). However, the best choice depends on your specific needs: PSU is best for Very high heat resistance (Tg ~187C) and retains strength near that range, while PETG is best for Tougher than PLA, higher temp tolerance, more durable in real-world use.
What are the temperature differences between PSU and PETG?
PSU prints at 340-380°C nozzle / 140-180°C bed. PETG prints at 215-270°C nozzle / 70-90°C bed.
Do PSU and PETG need an enclosure?
PSU: required. PETG: optional.
Which is more beginner-friendly: PSU or PETG?
PETG is more beginner-friendly as it doesn't require an enclosure.