Materials / Data sheet

Carbon-fiber PET PET-CF

Stiff parts that carry load in humid spots.

In plain words

Good for

Stiff parts that carry load in humid spots.

Not for

Strong acids or alkalis, and some solvents.

Upright is weaker

A printed part is strongest along its layers (flat, X-Y) and weaker across them (upright, Z). The table shows both. We turn the part so the load runs along the layers.

The full data sheet

Every number on this page is copied from the filament maker's technical data sheet (V3.0). The PDF has the test methods and print settings.

Download the manufacturer's datasheet (PDF)

Source: https://store.bblcdn.com/9690d6226f024acab2ba0dd52dabb654.pdf, linked from the maker's product page. Checked 2026-10-28.

Key numbers

Key numbers

As printed on the maker's data sheet. "Not published" means the data sheet does not give it.

PropertyFlat (X-Y)Upright (Z)
Tensile strength74 ± 6 MPa35 ± 5 MPa
Bending strength131 ± 6 MPa49 ± 5 MPa
Stiffness (bending modulus)5320 ± 270 MPa2210 ± 180 MPa
Impact strengthISO 17936.0 ± 2.7 kJ/m²; 8.6 ± 0.5 kJ/m² (notched)4.5 ± 0.6 kJ/m²
PropertyValue
Bends under light load atHDT 0.45 MPa205 °C (401 °F)
Bends under heavier load atHDT 1.8 MPa182 °C (360 °F)
Softening pointVicat226 °C (439 °F)
Density1.29 g/cm³
Water uptake0.37% (saturated, 25 °C, 55% RH)
BurningFlammable
Flame ratingUL 94Not published
Sunlight (UV)Not published
AcidsNot resistant
AlkalisNot resistant
SolventsNot resistant to some organic solvents
Oil and greaseResistant to most kinds of oil and grease

Test conditions from the data sheet: Mechanical Properties - Dry state; specimens annealed and dried at 80 °C for 12 h before testing; printed 270 °C nozzle, 80 °C bed, 100 mm/s, 100% infill. These are lab numbers for test bars, not a working limit for your part. The real limit depends on the load, the time at temperature and the shape, which is why we ask about all three.