PA6-CF is one of the most capable structural FFF materials available without moving to ultra-high-temperature polymers. In the dry state it offers exceptional strength and heat resistance, but its engineering behaviour changes materially as it absorbs moisture.
Material family names are not specifications. This page anchors the discussion to a named commercial grade and published printed-specimen data, then translates that data into practical selection and design guidance.
PA6-CF is one of the most capable structural FFF materials available without moving to ultra-high-temperature polymers. In the dry state it offers exceptional strength and heat resistance, but its engineering behaviour changes materially as it absorbs moisture.
Choose PA6-CF for heavily loaded, heat-exposed parts when moisture conditioning is understood and controlled.
Orientation, conditioning and geometry can move finished-part performance materially. Use these figures to compare candidate materials—not as guaranteed minimums.
| Property | Representative value | Test / context |
|---|---|---|
| Density | 1.09 g/cm³ | Manufacturer TDS |
| Tensile strength · dry | 102 ± 7 MPa | Manufacturer TDS |
| Elongation at break · dry | 5.8 ± 1.6% | Manufacturer TDS |
| Flexural modulus · XY dry | 5.46 ± 0.28 GPa | Manufacturer TDS |
| Flexural modulus · XY wet | 3.56 GPa | Manufacturer method |
| Flexural strength · XY dry | 151 ± 8 MPa | Manufacturer TDS |
| HDT · 0.45 MPa | 186°C | ISO 75 |
| Saturated moisture uptake | 2.35% · 25°C / 55% RH | Manufacturer method |
XY values normally represent flat-printed specimens. Z-direction strength can be substantially lower. Final production settings should be qualified on representative geometry.
A useful material choice starts with load case, temperature, environment, duty cycle and failure consequence—not the strongest number on a datasheet.