Temperature and resistance
What temperature can cast nylon withstand?
Some websites quote 250 °C or even 300 °C. For standard PA6G these figures are wrong: they are above its melting point.
Temperature limits
| Condition | Typical value |
|---|---|
| Continuous upper limit | About +100 °C |
| Short-term upper limit | 170 to 180 °C |
| Lower limit | About -30 °C |
| Melting temperature | 217 to 220 °C |
What these values mean
Continuous use means the part can run at this temperature for a long time. Short-term use covers brief peaks and is not a working temperature.
Cast nylon softens as it gets hotter. A loaded part starts to lose its shape long before the melting point.
Do not forget friction heat
Even at 40 °C ambient, a sliding bushing can run much hotter. Plastic does not conduct heat like metal, so heat builds up in fast, heavily loaded parts.
How to measure correctly
- Measure while the machine has run under full load for some time.
- Measure as close to the sliding surface as you can.
- Allow for summer conditions and the worst load.
Is this use suitable?
| Use | Typical temperature | First assessment |
|---|---|---|
| Indoor conveyor part | Ambient | Suitable |
| Machine in the summer sun | 50 to 70 °C | Suitable, watch UV and expansion |
| Oven exit slide | 120 °C and above | Not suitable for the standard grade |
| Cold store | -20 °C | Suitable, watch impact |
Frequently asked questions
At what temperature does cast nylon melt?
At about 217 to 220 °C, but under load it loses its shape at much lower temperatures.
Can cast nylon be used at 150 °C?
Not continuously. It can survive short peaks. For continuous 150 °C choose another material.
Does cast nylon crack in the cold?
It can be used down to about -30 °C. Toughness falls in severe cold, so impact is a greater risk.
Figures are typical values published by manufacturers and vary with grade and test conditions. Ask us for exact values.