Nylon 6/6 properties
Nylon 6/6 is a strong, tough engineering thermoplastic with good wear resistance and a relatively high service temperature. It is widely machined and molded into mechanical parts, though it absorbs moisture, which affects its dimensions.
Mechanical properties
| Property | Value |
|---|---|
| Tensile strength | 11,000 psi (76 MPa) |
| Flexural modulus | 410,000 psi (2.83 GPa) |
| Elongation at break | 50% |
| Hardness | Rockwell R120 |
Physical properties
| Property | Value |
|---|---|
| Density | 0.041 lb/in³ (1140 kg/m³) |
| Melting point | about 260 °C |
Thermal properties
| Property | Value |
|---|---|
| Max service temperature | about 100 °C continuous |
| Thermal expansion | 80 µm/m·°C |
| Thermal conductivity | 0.25 W/m·K |
Values are typical for the grade and condition shown. Actual properties vary with temper, heat treatment, and product form, so use these for comparison and preliminary design and confirm against material certificates for final work.
Compare with other materials
See the Material Properties Comparison, Yield Strength, and Density charts.
Typical uses
Nylon 6/6 is used for gears, bearings, bushings, rollers, washers, and wear parts. Its strength, toughness, and wear resistance suit moving mechanical components, and it runs quietly against metal, often self-lubricated by added additives.
How it compares
Nylon is tougher and more impact resistant than Delrin but absorbs more moisture, so its dimensions and stiffness shift with humidity. It is stronger and more heat resistant than the polyethylenes, making it a common metal-replacement for mechanical parts.
FAQ
Does nylon absorb water?
Yes. Nylon 6/6 absorbs moisture from the air, which slightly swells it and lowers stiffness, so dimensional tolerances must allow for it.
What is nylon 6/6 used for?
Gears, bearings, bushings, rollers, and wear parts, where strength, toughness, and wear resistance are needed in a machinable plastic.
Is nylon stronger than Delrin?
Nylon is tougher and more impact resistant; Delrin is stiffer and more dimensionally stable. The better choice depends on whether toughness or stability matters more.