Bambu Lab PAHT-CF Filament 1.75mm

$48.00

High-temperature carbon-fibre nylon, built on PA12 rather than PA6 — and that difference is the whole point of it. It gives you most of PA6-CF's strength, better toughness, higher heat resistance, and it keeps working when it's damp.

Bambu's suggested uses are functional prototypes, machining fixtures, injection moulds, jigs and low-volume production parts.

If you're choosing between the two nylons in Singapore, this is usually the one. Water absorption is 0.88% against PA6-CF's 2.35%, and Bambu state it has been optimised to retain its mechanical properties when wet. PA6-CF is stronger on paper but loses over a third of its bending strength once it picks up moisture.

Enclosure and a hardened nozzle. 45–60°C chamber, and a hardened steel nozzle with 0.6mm recommended. It will not run in the AMS Lite, but unlike the other carbon-fibre nylons it is fully compatible with the AMS, AMS 2 Pro and AMS HT.

At a glance

Density	1.06 g/cm³
Nozzle temp	260–290°C
Bed temp	80–100°C
Enclosure	Required — 45–60°C chamber
Print speed	Up to 100 mm/s
Nozzle	Hardened steel, 0.6mm recommended
Compatibility	AMS Lite AMS / AMS 2 Pro

PAHT-CF against PA6-CF

	PAHT-CF	PA6-CF
Water absorption	0.88%	2.35%
Impact, notched	22.8 kJ/m²	13.4 kJ/m²
Heat deflection	170°C	164°C
Tensile strength	92 MPa	102 MPa
Bending strength	125 MPa	151 MPa

PA6-CF wins on raw strength by about 10–20%, in the dry state. PAHT-CF wins on toughness, heat, and — crucially here — humidity tolerance. Unless your part is going somewhere air-conditioned and you'll keep the spool in a dry box religiously, PAHT-CF will give you the more reliable result.

Printing it well

Glue is required on the plate; the Cool Plate SuperTack is not compatible.

Layer bonding is better than most carbon-filled materials — Bambu call it out as enhanced Z-bonding, and the figures support it: tensile 47 MPa across layers against 92 in plane, a ratio of about half where PC FR manages only a third. Still orient sensibly, but it is more forgiving.

Use Support for PA/PET — specified by name for this material.

Keep the fan low: 0–40%, lower than most. Nylon needs to cool slowly to bond well.

Annealing: 80–130°C for 6 to 12 hours, endorsed by Bambu.

Storage

Bambu specifies under 20% RH, sealed with desiccant, and 80°C for 8–12 hours to dry. It is far more tolerant than PA6-CF, but it is still a nylon — dry it before anything that matters.

Bambu's usage guide for the CF grades covers feeding, warping and tuning in more depth: ASA-CF / PAHT-CF Usage Guide

Full specifications

Printing

Nozzle temperature260–290°C

Nozzle size0.6 mm recommended
hardened steel

Bed temperature80–100°C

Chamber temperature45–60°C

Build plateGlue required
Cool Plate SuperTack

Print speedUp to 100 mm/s

Support materialSupport for PA/PET

Drying & storage

Drying80°C for 8–12 hours

HumidityUnder 20% RH, sealed

Water absorption0.88%

Annealing80–130°C for 6–12 hours

Thermal

Density1.06 g/cm³

Melting temperature225°C

Vicat softening220°C

Heat deflection170°C at 1.8 MPa
194°C at 0.45 MPa

Mechanical

Tensile strength (X–Y)92 ± 7 MPa
47 ± 5 MPa (Z)

Young's modulus (X–Y)3860 ± 230 MPa

Bending strength (X–Y)125 ± 7 MPa

Impact strength (X–Y)57.5 ± 3.4 kJ/m²
22.8 ± 1.8 notched

Figures from the Bambu Lab PAHT-CF technical data sheet v3.0, measured in the dry state, with nozzle, build-plate and compatibility detail from Bambu's ASA-CF / PAHT-CF usage guide. Real-world results vary with printer, settings and model geometry.