What Is PA6 LCF40? Verified Properties of PA6-BC04B
LFT-G® PA6 LCF40 is a 40% long carbon fiber-reinforced polyamide 6 material that combines a high strength-to-weight ratio with exceptional thermal stability, redefining possibilities across automotive, aerospace, and industrial manufacturing sectors. The cost-effective entry grade of the PA6 long carbon fiber range: real carbon-fiber stiffness at 1.29 g/cm³, without flagship-grade cost.
Typical properties - PA6-BC04B (official TDS, version A3):
| Property | Value | Standard |
|---|---|---|
| Density | 1.29 g/cm³ | ASTM D-792 |
| Molding shrinkage | 0.1–0.3 % | ASTM D-955 |
| Tensile strength | 261 MPa | ISO 527 |
| Tensile modulus | 30,669 MPa | ISO 527 |
| Elongation at break | 0.8–1.7 % | ISO 527 |
| Flexural strength | 372 MPa | ASTM D-790 |
| Flexural modulus | 20,863 MPa | ASTM D-790 |
| Notched Izod impact strength | 257 J/m | ASTM D-256 |
| Notched impact strength | 28 kJ/m² | ISO 179 |
| Notched impact strength | 26 kJ/m² | ISO 180 |
| Heat deflection temperature (1.8 MPa) | 208 °C | ISO 75-2 |
| Flammability | HB at 1.5 mm | UL-94 |
ASTM companion values (tensile strength 260 MPa, tensile modulus 30,693 MPa) are listed in the full TDS (PDF).
The aligned long carbon fiber architecture in PA6 LCF40 delivers 28% higher impact resistance and 40% better creep resistance compared to short-fiber composites. The long fiber network maintains structural integrity under multidirectional stresses, making it ideal for load-bearing components; at 1.29 g/cm³, parts achieve 15–25% mass reduction in moving components. In the molded part the fibers form a three-dimensional skeleton - the mechanism behind this creep and fatigue performance: shrinkage is only 0.1–0.3%.
Long fiber (6–25 mm) vs short fiber (<3 mm) pellets.
How PA6 LCF40 Is Made
LFT-G® produces PA6 LCF40 on its own melt-impregnation pultrusion lines in Xiamen: carbon fiber rovings are drawn through a molten PA6 die, fully wetted, cooled and cut into full-length-fiber pellets. Not masterbatch dilution, not short-fiber compounding - complete wet-out is what lets the skeleton form inside your part.
Processing PA6 LCF40 and Custom Grades
Processing parameters (PA6-BC04B TDS): injection pressure 70–130 MPa; melt 243–270 °C; mold 54–95 °C; pre-dry 2–4 hours at 85–100 °C to below 0.05% moisture. Protect the fiber length: moderate back pressure and screw speed, full-round runners, generous direct gates - no pinpoint gates.
Customization: fiber content and UV or heat stabilization are tuned to your part. Samples of LCF40, LCF50 and LCF60 can be prepared together - stiffness against cost, decided on molded parts.
Applications of PA6 LCF40
Breaker bodies, housings and distribution components: stable at 0.1–0.3% shrinkage, stiff for latch loads, steady near heat.
Airframes, fan and propulsion components, brackets and housings: carbon-fiber stiffness at 1.29 g/cm³ is flight time - and the long fiber network survives vibration and landing loads that crack short-fiber parts.
EV battery trays & housings, seat frames, door beams and clutch parts - 261 MPa replacing pressed metal at a fraction of the weight.
Gear and motor housings that take drops and torque reaction without a metal case's weight.
Brackets, gears and automation parts under sustained load - where 40% better creep resistance is the design margin.
Quality Backed by Certification
Every value is the verified BC04B datasheet value - full TDS, one click away.
Batch COA available on request, measured on the material that ships to you.
PA6 LCF40 FAQ
-
What is PA6 LCF40?
A 40% long carbon fiber-reinforced polyamide 6 material. The LFT-G® grade is PA6-BC04B - 261 MPa tensile, 30,669 MPa modulus, 1.29 g/cm³ - supplied as injection molding pellets.
How does PA6 LCF40 compare with short carbon fiber PA6?
Short-fiber pellets carry fibers under 3 mm; LCF40 pellets carry full-length fiber forming a three-dimensional skeleton - 28% higher impact resistance, 40% better creep resistance, far better stability under load.
Can I get the TDS and samples of PA6 LCF40?
Yes - the full BC04B TDS (PDF) is one click away. For samples, send your part drawing, current material and target properties; a sample plan comes back with pricing.
Related Grades: The PA6 Carbon Ladder
PA6-BC04B - 261 MPa, 30,669 MPa modulus, 1.29 g/cm³. The cost-effective entry grade.
PA6-BC05B - 298 MPa, 34,891 MPa modulus, 1.32 g/cm³. The mainstream grade.
The flagship: maximum stiffness of the PA6 carbon range.
Get PA6 LCF40 Samples and Pricing
Tell us the part, your current material and the property to hit - you receive a sample plan and pricing for PA6-BC04B, plus an honest answer if another grade fits better.
Email: candyhu@lfrtplastic.com | WhatsApp: +86 13950095707
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