Where PAI earns its place
When a metal part is too heavy or a normal engineering plastic melts, PAI fills the gap: jet-engine brackets, semiconductor clamps, valve seats and thrust washers running hot and loaded.
Key properties
High-temp strength
Retains load-bearing strength to ~250°C continuous.
Wear & creep
Excellent under load, low creep vs other thermoplastics.
Dimensional stability
Low thermal expansion, tight-tolerance parts.
Chemical
Good vs solvents, oils, fuels; limited vs strong bases.
Typical applications
| Field | PAI parts |
|---|---|
| Aerospace / engine | Bushings, seals, brackets |
| Semiconductor | Clamps, fixtures, wafer-handling |
| Industrial | Valve seats, thrust washers, gears |
| Oil & gas | Downhole wear components |
Machining notes
PAI is abrasive to tooling and usually post-cured; Teresi machines to drawing and can advise on grade and finishing.
Frequently asked questions
What temperature can PAI withstand?
About 250°C continuous, briefly higher — the highest of unfilled thermoplastics.
PAI vs PEEK — when to pick PAI?
Pick PAI when temperature, creep and wear under load beat PEEK; pick PEEK for broader chemical resistance and easier processing.
Is PAI machinable?
Yes, but it is hard and abrasive; use sharp carbide/PCD tooling and allow post-cure.