Bambu Lab PAHT-CF: Carbon Fibre Nylon Filament

# Bambu Lab PAHT-CF

Quick Overview:Bambu Lab PAHT-CF

Bambu Lab PAHT-CF is a 1.75 mm carbon-fiber-reinforced engineering nylon made from PA12 and other long-chain polyamides. It is designed for functional prototypes, machining fixtures, molds, jigs, automotive components, tooling, and low-volume production parts that need high strength, heat resistance, dimensional stability, and better wet-condition property retention than conventional PA6-based carbon-fiber nylon.

Bambu publishes 92 ± 7 MPa XY tensile strength, 57.5 ± 3.4 kJ/m² XY impact strength, 125 ± 7 MPa XY bending strength, and 194°C HDT at 0.45 MPa. The current TDS also lists 170°C HDT at 1.8 MPa, 220°C Vicat softening temperature, 225°C melting temperature, and approximately 1.06 g/cm³ density.

Its defining advantage is moisture behavior: Bambu reports 0.88% saturated water absorption, versus 2.35% for Bambu PA6-CF, with much better wet-condition property retention. It still requires pre-drying, an enclosure, and a hardened nozzle.

For current manufacturer data, see the official Bambu Lab PAHT-CF page and Bambu Lab filament guide.

PAHT-CF Key Benefits

• 92 ± 7 MPa XY tensile strength
• 194°C / 170°C HDT at 0.45 / 1.8 MPa
• 57.5 ± 3.4 kJ/m² XY impact strength
• 0.88% saturated water absorption
• Strong wet-condition property retention
• 260–290°C nozzle / 80–100°C bed
• 45–60°C chamber range
• 0.6 mm hardened nozzle recommended
• AMS / AMS 2 Pro / AMS HT compatible
• 0.5 kg and 1 kg spool options

Bambu Lab PAHT-CF best For

1. Functional prototypes and fixtures
2. Injection-mold tooling
3. Automotive engineering parts
4. Humid-environment components
5. Low-volume production and tooling

Technical Specifications: Bambu Lab PAHT-CF

Bambu PAHT-CF Printing Settings

Bambu's current PAHT-CF process window is:

• Nozzle: 260–290°C
• Bed: 80–100°C
• Chamber: 45–60°C
• Print speed: ≤100 mm/s
• Cooling: 0–40%
• Humidity: Below 20% RH
• Recommended nozzle: 0.6 mm hardened steel
• Supported hardened nozzles: 0.4, 0.6, and 0.8 mm

Bambu recommends a 0.6 mm hardened-steel nozzle to balance clog resistance and detail. Stainless-steel and 0.2 mm nozzles are not recommended/supported.

Bambu Lab PAHT-CF Printer Compatibility

PAHT-CF requires an enclosed printer with a hardened hotend and an 80–100°C-capable bed.

The indexed Bambu Lab H2D is a strong match for PAHT-CF because it combines high hotend capability with active chamber heating and hardened nozzle options.

Other enclosed Bambu systems may support PAHT-CF when their current material profile and hardware meet these requirements. See Best 3D Printers for Carbon Fiber Materials for broader options.

Bambu Lab PAHT-CF Drying and Storage

PAHT-CF must be dry before printing.

Bambu recommends:

• Forced-air / blast drying: 80°C for 8–12 hours
• Printing/storage humidity: Below 20% RH
• Storage: Sealed with desiccant

Low saturated water absorption improves service stability, but it does not eliminate pre-drying or dry storage requirements.

AMS, AMS 2 Pro, and AMS HT Compatibility for Bambu Lab PAHT-CF

Current Bambu documentation lists PAHT-CF as compatible with:

• AMS
• AMS 2 Pro
• AMS HT

It is not compatible with AMS Lite.

The Bambu Lab AMS 2 Pro can feed/store PAHT-CF but tops out at 65°C, so Bambu says it cannot fully perform the required 80°C drying cycle. AMS HT reaches 85°C and is the better Bambu drying option.

Bambu Lab PAHT-CF Moisture Resistance: What 0.88% Means

PAHT-CF's 0.88% saturated water absorption is much lower than Bambu PA6-CF at 2.35%. Bambu also shows markedly better wet-condition strength and stiffness retention than its conventional PA-CF reference.

It is still hygroscopic enough that wet filament can cause bubbles, rough surfaces, dimensional inconsistency, and poor layer quality, so drying remains mandatory.

Bambu Lab PAHT-CF Chemical Resistance: Important Limitation

PAHT-CF should not be marketed as broadly chemical-resistant simply because it is an engineering nylon.

Bambu's PAHT-CF TDS states:

• Acids: Not resistant
• Alkalis: Not resistant
• Some organic solvents: Not resistant
• Most oils and greases: Resistant
• Water: Insoluble

Validate the exact chemical, concentration, temperature, and exposure duration before fluid-contact or chemical-process use.

Bambu Lab PAHT-CF Heat Resistance and Annealing

Bambu publishes:

• 194°C HDT at 0.45 MPa
• 170°C HDT at 1.8 MPa
• 220°C Vicat
• 225°C melting temperature

HDT load matters: 194°C at 0.45 MPa is not a universal continuous-use rating. Bambu documents optional annealing at 80–130°C for about 5–12 hours, with possible warping or dimensional change.

Bambu Lab PAHT-CF Mechanical and Layer Performance

PAHT-CF publishes 92 MPa XY / 47 MPa Z tensile strength, 125 MPa XY / 61 MPa Z bending strength, and 57.5 / 13.3 kJ/m² XY/Z impact strength.

Its relatively strong Z performance and wet-condition retention make it useful for fixtures, brackets, housings, and other parts where layer adhesion matters as much as headline XY strength.

Bambu PAHT-CF vs Bambu PA6-CF

The Bambu PAHT-CF vs PA6-CF comparison is moisture stability and toughness versus higher dry-state stiffness and bending strength.

Bambu's current comparison data shows:

Choose PAHT-CF for humidity stability, toughness, and AMS use; choose PA6-CF for maximum dry stiffness and bending strength.

Bambu PAHT-CF vs Bambu PET-CF

The Bambu PAHT-CF vs PET-CF comparison is tougher nylon behavior versus lower-moisture, stiffer PET composite behavior.

The official Bambu PET-CF publishes:

• 205°C HDT at 0.45 MPa
• 0.37% saturated water absorption
• 131 MPa XY bending strength
• 5320 MPa XY bending modulus
• 36.0 kJ/m² XY impact strength
• No AMS compatibility

Prefer PAHT-CF for toughness, Z performance, and AMS compatibility; choose PET-CF for stiffness, lower moisture uptake, and slightly higher HDT.

Bambu PAHT-CF vs Fiberon PA6-CF20

The indexed Polymaker Fiberon PA6-CF20 is a 20% carbon-fiber PA6 focused on very high stiffness and strength.

Polymaker publishes 109.3 MPa XY tensile strength, 8636 MPa dry Young's modulus, 215°C / 173°C HDT at 0.45 / 1.8 MPa, and about 3.3% equilibrium water absorption.

PAHT-CF is less stiff but absorbs much less moisture and retains properties better when wet.

Choose Fiberon PA6-CF20 when maximum stiffness, tensile performance, and annealed high-temperature performance are the priorities.

Choose PAHT-CF when humid-environment stability, impact toughness, and Bambu ecosystem integration matter more.

Bambu PAHT-CF vs Prusament PA11 Carbon Fiber

The indexed Prusament PA11 Carbon Fiber publishes about 192°C / 152°C HDT at 0.45 / 1.8 MPa and is attractive for wear, low friction, impact, chemical resistance, and enclosure-free printing.

PAHT-CF offers higher published tensile strength, higher 1.8 MPa HDT, and AMS integration.

Choose PA11-CF for wear, friction, chemical exposure, and more flexible printer requirements.

Choose PAHT-CF for stronger Bambu integration, high tensile performance, and low-moisture enclosed production.

Comparison Table: PAHT-CF and Engineering CF Alternatives

Cross-manufacturer values use different print, conditioning, annealing, and test procedures. Use this table for material positioning rather than direct engineering substitution.

Which PAHT-CF Alternative Fits Best?

• Bambu PA6-CF: best when dry-state stiffness and bending strength matter more than moisture resistance.
• Bambu PET-CF: best when lower moisture absorption and greater stiffness outweigh lower impact toughness and lack of AMS support.
• Fiberon PA6-CF20: best for very high stiffness, tensile strength, and annealed PA6-CF performance.
• Prusament PA11 Carbon Fiber: best for wear, friction, impact, and chemical-resistant mechanical parts.
• Prusament PC Blend Carbon Fiber: easier carbon-fiber option when 100–130°C-class heat resistance is sufficient.
• Bambu PAHT-CF: strongest fit when toughness, low moisture absorption, layer adhesion, and Bambu AMS integration are priorities.

Bambu Lab PAHT-CF Price and Availability

Bambu’s US store lists PAHT-CF from US$49.99 per 0.5 kg in USA. For buyers comparing PAHT-CF price per gram, that is about US$0.10/g. Regional approximate price is €42.71 in Europe • £36.59 in UK • AED 183.59 in UAE • C$68.72 in Canada • A$69.84 in Australia • ₹4,786 in India. Actual prices may vary by region, tax, shipping, promotions, stock, and exchange rates.

Bambu Lab PAHT-CF Limitations and Practical Considerations

• Must be dried before printing.
• Requires an enclosed printer.
• Carbon fiber is abrasive; use hardened steel.
• 0.6 mm nozzle is recommended.
• 0.2 mm nozzle is not compatible.
• Stainless-steel nozzles are not recommended.
• Print speed is limited to about 100 mm/s.
• Keep filament below 20% RH during printing and storage.
• AMS Lite is not compatible.
• AMS 2 Pro can feed PAHT-CF but cannot fully dry it to the 80°C requirement.
• 194°C HDT is measured at 0.45 MPa, not a universal service-temperature guarantee.
• PAHT-CF is not resistant to acids or alkalis and is not resistant to some organic solvents.
• Annealing can change dimensions.
• Mechanical values depend on orientation, moisture condition, and post-treatment.

Frequently Asked Questions