Engineering plastic
PEI / Ultem
Polyetherimide
High heat, dimensional stability and flame performance in a strong amber engineering plastic.
01 · QUICK ANSWER
When should you choose PEI / Ultem?
Unfilled PEI is the balanced machining choice. Glass-filled grades improve stiffness and stability but raise tool wear and can produce a more textured finished surface.
02 · SELECTION DATA
Typical properties at a glance
Screening values only. Final design data must follow the exact grade, condition, stock form and supplier certificate.
Density1.27–1.51 g/cm³
Strength range100–170 MPa tensile
TemperatureContinuous use near 170°C
MachinabilityGood
03 · ENGINEERING NOTES
Specify what changes the result
A material name alone is not enough. Include grade, condition, finish and documentation on the drawing or purchase specification.
- Ultem 1000
- Ultem 2100
- Ultem 2300
- Static-dissipative PEI
- Electrical connectors
- Aircraft interiors
- Semiconductor fixtures
- Sterilizable parts
- Premium raw-material cost
- Not resistant to every solvent
- Annealing may be needed for deep material removal
- As machined
- Polish
- Laser mark
- Controlled deburr
04 · MANUFACTURING FIT
Available process routes
CNC machiningCommonly available
Sheet metalReview by grade and geometry
3D printingCommonly available
05 · NEXT COMPARISON