General Polyamide 66 (PA66)

Alternative and trade names
Bergamid™, Radilon®, Ultramid®, Zytel®


It offers excellent performance especially in the retention of mechanical properties at elevated temperatures. It is the material with the greatest hardness, rigidity, abrasion resistance and thermostability. It is one of the preferred materials for parts subject to mechanical and thermal stresses in electrical, mechanical and automotive engineering.



Density ρ

1.13 - 1.15 g/cm³ at 20 °C


Elastic modulus E

1.3 - 2 GPa at 20 °C

Elongation A

150 - 300 % at 20 °C

Impact strength, Charpy notched Ivnot

5 - 30 kJ/m² at 20 °C

Impact strength, Charpy unnotched Iunnot

no break

Max allowed stress σmax

50 - 70 MPa at 20 °C

at 15-30% strain


Coefficient of thermal expansion α

6E-5 - 1.5E-4 1/K at 20 °C


UL 94 V2

Max service temperature, long Tmaxlong

80 - 120 °C

Max service temperature, short Tmaxshort

170 - 200 °C

Melting point Tm

255 - 260 °C

Specific heat capacity cp

1700 J/(kg·K) at 20 °C

Thermal conductivity λ

0.13 - 0.29 W/(m·K) at 20 °C


Dielectric constant εr

3.2 - 5.5 [-] at 20 °C

Electrical resistivity ρel

1.00E+9 - 1.00E+14 Ω·m at 20 °C




Technological properties

Application areas

Textile fibres, hosiery, swim wear, tennis strings, fishing lines


Unfilled, no additives.

Processing methods

Injection molding, extrusion, coating, casting

This material data has been provided by M-Base.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.