PA66 vs PA6 Nylon Screws: Performance Comparison
PA66 vs PA6 Nylon Screws: Performance Comparison
PA66 and PA6 are the two most common nylon materials for plastic fasteners. Though chemically similar, their performance differs noticeably.
1. Mechanical Strength
PA66 offers slightly higher tensile strength and stiffness than PA6, with better strength retention at elevated temperatures.
2. Moisture Absorption
PA6 absorbs slightly more moisture than PA66. Moisture causes dimensional changes and strength loss, so PA66 is preferred for dimensional stability.
3. Temperature Performance
PA66 has a higher melting point (~260°C vs ~220°C) and higher heat deflection temperature.
4. Processing and Appearance
PA6 has better flow and surface finish for complex shapes; PA66 offers better rigidity and wear resistance.
5. Cost
Costs are similar, with PA66 slightly higher. For most fastener applications, PA66 offers the better overall value.
Conclusion
For general industrial fasteners, PA66 is recommended for its balanced strength, temperature and dimensional stability. PA6 suits low-cost applications requiring excellent surface finish.