Properties of Nylon 66 (PA-66)

Nylon 66, also known as polyamide 66, is a type of synthetic polymer or plastic. It is made from two monomers, hexamethylenediamine and adipic acid, which are chemically combined to form long chains of repeating units. Nylon 66 is known for its strength, durability, and resistance to wear and tear.

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 icon to switch between Metric and Imperial units.

Table of Nylon 66 Properties
Physical Properties
Metric
CategoryThermoplastic
Density1140 kg/m3
Water Absorption2.3 %wt/day
Mechanical PropertiesMetric
Ultimate Tensile Strength82 MPa
Yield Tensile Strength59 MPa
Ultimate Compressive Strength103 MPa
Young’s Modulus (E)3.3 GPa
Flexural Modulus1.207 GPa
Elongation at Break300%
Rockwell Hardness (M)89
Static Friction Coefficient (µ)0.2 - 0.3
Thermal PropertiesMetric
Melting Point255 °C
Thermal Conductivity0.25 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 PropertiesMetric
Relative Permittivity (@1 MHz) (εr)3.4
Electrical Resistivity1013 Ω·cm
Dielectric Field Strength (Ed)250 kV/cm
Hazardous DataMetric
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)

Related Pages
References: 1) Cardarelli, François. Materials Handbook: A Concise Desktop Reference. Switzerland: Springer International Publishing, 2018. 2) CRC Handbook of Chemistry and Physics, 97th Edition. United Kingdom: CRC Press, 2016-2017. 3) A.M. Howatson, P.G. Lun, J.D. Todd, P.D. Engineering Tables and Data. United Kingdom: University of Oxford, Department of Engineering Science, 2009.