Properties of Nylon 66 (PA-66)
Nylon 66, also known as polyamide 66 (PA-66), is a widely used engineering thermoplastic, valued for its excellent mechanical strength, durability, and resistance to abrasion and chemicals. Formed from hexamethylenediamine and adipic acid, it is commonly employed in automotive, electrical, and industrial applications.
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The following table provides a comprehensive list of nylon 66 (PA-66) properties in both SI and US customary/Imperial units at normal temperature and pressure (NTP).
Click on the button to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Category | Thermoplastic |
| Density | 1140 kg/m3 |
| Water Absorption | 2.3 %wt/day |
| Mechanical Properties | Metric |
| Ultimate Tensile Strength | 82 MPa |
| Yield Tensile Strength | 59 MPa |
| Ultimate Compressive Strength | 103 MPa |
| Young’s Modulus (E) | 3.3 GPa |
| Flexural Modulus | 1.207 GPa |
| Elongation at Break | 300% |
| Rockwell Hardness (M) | 89 |
| Static Friction Coefficient (µ) | 0.2 - 0.3 |
| Thermal Properties | Metric |
| Melting Point | 255 °C |
| Thermal Conductivity | 0.25 W/m·K |
| Specific Heat Capacity (Cp) | 1670 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 4×10-5 1/°C |
| Glass Transition Temperature (Tg) | 50 °C |
| Electrical Properties | Metric |
| Relative Permittivity (@1 MHz) (εr) | 3.4 |
| Electrical Resistivity | 1013 Ω·cm |
| Dielectric Field Strength (Ed) | 250 kV/cm |
| Hazardous Data | Metric |
| Flammability Rating (ANSI/UL 94) | Self extinguishable |
Unless stated otherwise, all values are taken at room temperature (approximately 20°C or 68°F) and 1 atm pressure. (1 atm = 101,325 Pa)