Polyamide 66 Reinforced with 40 % Carbon Fiber — Examid® PA66 CF40

Description

Examid® PA66 CF40 is a highly reinforced polyamide 66 containing 40 % short carbon fiber. It is one of the stiffest thermoplastics in the PA class — tensile modulus ~27 000 MPa, tensile strength ~350 MPa (ISO 527). Developed for structural parts previously made from aluminum or magnesium alloys, where the combination of weight, stiffness and heat resistance drives the design decision.

Compared with PA66 GF50 (modulus ~17 000 MPa), switching to CF40 gives +60 % stiffness with a 10–15 % reduction in part weight (density 1.35 vs 1.55 g/cm³). Compared with AA6061 aluminum (modulus 70 GPa), the polymer has lower absolute stiffness, but with an optimized cross-section and geometry it competes on assembly stiffness at 50 % lower weight.

Heat resistance HDT/A ~245 °C per ISO 75-2 (1.8 MPa) — continuous service temperature up to 150 °C, short-term up to 200 °C. Suitable for under-hood applications, e-axles and thermal-cycling zones. The carbon fiber provides a surface resistance of 10⁴–10⁶ Ohm — electrostatic dissipation for sensitive electronics.

Key advantages

• Tensile modulus ~27 000 MPa (ISO 527) — one of the stiffest thermoplastics in the polyamide class
• Tensile strength ~350 MPa (ISO 527) — metal-replacement class performance
• Heat resistance HDT/A ~245 °C (ISO 75-2, 1.8 MPa); continuous service temperature up to 150 °C, peaks up to 200 °C
• Density 1.35 g/cm³ — 50 % lighter than aluminum and 80 % lighter than steel at comparable stiffness in an optimized cross-section
• Low shrinkage ~0.3 % in the flow direction — accurate geometry in serial molding
• High fatigue and crack resistance under cyclic loading
• Electrostatic dissipation (surface resistance 10⁴–10⁶ Ohm)
• Good flowability for thin-walled and complex geometries

Applications

• E-mobility: e-axle brackets, electric motor housings, power cable holders, battery cooling system elements — weight is critical for range
• Structural automotive assemblies: brake and clutch pedal levers, under-hood elements (intake manifolds, brackets), intake system supports
• Industrial robotics: manipulator arms, mounting flanges, servo drive housings — stiffness determines positioning accuracy
• Sports and protective equipment: exoskeleton components, prosthetics, orthopedic splints, professional tool frames
• Electronic housings with antistatic requirements: shields for sensitive electronics, PCB support elements
• Industrial guides and large-section gears replacing metal under constant load

The stated values are measured by in-house methods close to the corresponding ISO and GOST standards. The information is for reference only and does not constitute an official batch technical data sheet. Please request the TDS and MSDS for a specific batch before industrial use.