Metal-filled PLA vs TPU
Compare Metal-filled PLA and TPU filaments side-by-side. See which one is best for your 3D printing project.
Metal-filled PLA
FPLA + metal shavings
Hefty, can show metal-like properties (patina/polish/magnetism)
TPU
SThermoplastic Polyurethane
Perfect layer adhesion; extremely impact resistant; nearly indestructible
Detailed Comparison
Property
Metal-filled PLA
TPU
Tier Rating
Tier F
Tier S
Family
PLA
Flexible
Nozzle Temp
190-220°C
200-240°C
Bed Temp
50-60°C
30-60°C
Enclosure
not needed
not needed
Cooling
Moderate cooling
Moderate cooling
Moisture Sensitivity
moderate
high
Strengths Comparison
Metal-filled PLA Strengths
- Hefty, can show metal-like properties (patina/polish/magnetism)
TPU Strengths
- Perfect layer adhesion; extremely impact resistant; nearly indestructible
- Great for combat robots, tactical/rough-use parts
- Rubber-like parts (gaskets, grips, bumpers, wheels)
Considerations
Metal-filled PLA Caveats
- Weaker than regular PLA
- Very brittle on/off spool
- Very expensive and higher density means fewer prints per spool
- Usually better replaced by paint/inserts/electroplating
TPU Caveats
- Slow printing; retraction can cause jams (especially in Bowden setups)
- Stringing is common
- Very moisture sensitive; wet TPU prints poorly
Frequently Asked Questions
Is Metal-filled PLA or TPU better for 3D printing?
TPU is generally rated higher (Tier S) compared to Metal-filled PLA (Tier F). However, the best choice depends on your specific needs: Metal-filled PLA is best for Hefty, can show metal-like properties (patina/polish/magnetism), while TPU is best for Perfect layer adhesion; extremely impact resistant; nearly indestructible.
What are the temperature differences between Metal-filled PLA and TPU?
Metal-filled PLA prints at 190-220°C nozzle / 50-60°C bed. TPU prints at 200-240°C nozzle / 30-60°C bed.
Do Metal-filled PLA and TPU need an enclosure?
Metal-filled PLA: not needed. TPU: not needed.
Which is more beginner-friendly: Metal-filled PLA or TPU?
Both Metal-filled PLA and TPU are beginner-friendly options.