Dry Unfilled PA 6/6
Dry unfilled PA 6/6 is a grade of PA 6/6. It has the second lowest strength and highest ductility compared to the other variants of PA 6/6. The graph bars on the material properties cards below compare dry unfilled PA 6/6 to: polyamide plastics (top), all thermoplastics (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Compressive (Crushing) Strength
73 MPa 11 x 103 psi
Elastic (Young's, Tensile) Modulus
3.3 GPa 0.47 x 106 psi
Elongation at Break
46 %
Flexural Modulus
2.8 GPa 0.41 x 106 psi
Flexural Strength
110 MPa 17 x 103 psi
Impact Strength: Notched Izod
53 J/m 1.0 ft-lb/in
Rockwell M Hardness
85
Rockwell R Hardness
120
Tensile Strength: Ultimate (UTS)
86 MPa 12 x 103 psi
Thermal Properties
Glass Transition Temperature
50 °C 120 °F
Heat Deflection Temperature At 1.82 MPa (264 psi)
85 °C 190 °F
Heat Deflection Temperature At 455 kPa (66 psi)
230 °C 440 °F
Maximum Temperature: Autoignition
460 °C 860 °F
Maximum Temperature: Decomposition
410 °C 770 °F
Maximum Temperature: Mechanical
100 °C 210 °F
Melting Onset (Solidus)
260 °C 500 °F
Specific Heat Capacity
1570 J/kg-K 0.37 BTU/lb-°F
Thermal Conductivity
0.24 W/m-K 0.14 BTU/h-ft-°F
Thermal Expansion
81 µm/m-K
Electrical Properties
Dielectric Constant (Relative Permittivity) At 1 Hz
3.6
Dielectric Constant (Relative Permittivity) At 1 MHz
3.0
Dielectric Strength (Breakdown Potential)
27 kV/mm 1.1 V/mil
Electrical Dissipation At 1 Hz
0.020
Electrical Resistivity Order of Magnitude
13 10x Ω-m
Otherwise Unclassified Properties
Density
1.1 g/cm3 71 lb/ft3
Limiting Oxygen Index (LOI)
26 %
Water Absorption After 24 Hours
1.2 %
Water Absorption At Saturation
8.5 %
Common Calculations
Stiffness to Weight: Axial
1.6 points
Stiffness to Weight: Bending
43 points
Strength to Weight: Axial
21 points
Strength to Weight: Bending
38 points
Thermal Diffusivity
0.13 mm2/s
Thermal Shock Resistance
23 points
Followup Questions
Further Reading
SPI Plastics Engineering Handbook of the Society of the Plastics Industry, Inc., 5th ed., Michael L. Berins (editor), 2000
Modern Plastics Handbook, Charles A. Harper (editor), 1999
Plastics Materials, 7th ed., J. A. Brydson, 1999