Material · Engineering Plastics
PEEK
The polymer that replaces metal: 250 °C service, chemical immunity, implant-grade options.
Price index: $$$$$
Instant quote onlineMaterial properties
| Parameter | Value |
|---|---|
| Tensile strength | 100 MPa |
| Yield strength | ~100 MPa |
| Hardness | M99 (Rockwell) |
| Density | 1.30 g/cm³ |
Choose it when
The environment eliminates everything cheaper: above ~150 °C continuous, aggressive chemicals, repeated sterilization, vacuum/outgassing limits or implantation. Nothing else machinable survives all five.
Look elsewhere when
The part lives at room temperature in air — POM does the job at a fraction of the cost. If 170 °C and sterilizability are enough, PEI (Ultem) delivers most of PEEK for far less.
Compatible finishes
As-Machined
The baseline finish: straight off the machine, fastest and cheapest.
Vibratory Tumbling
Batch deburring by the bowl-full: every edge broken, every burr gone, at volume prices.
Laser Marking
Permanent identification with zero dimensional change: serials, logos and codes burned in, not stuck on.
Typical applications
- Semiconductor wafer-handling components
- Down-hole oil & gas seals and bushings
- Implant trials and surgical components (implant grade)
- Aerospace brackets and high-temp insulators
Compared with similar grades
| Property | PEEK | ABS | Polycarbonate (PC) | Nylon PA6 |
|---|---|---|---|---|
| Tensile strength | 100 MPa | 40 MPa | 66 MPa | 79 MPa (dry) |
| Yield strength | ~100 MPa | ~40 MPa | ~62 MPa | ~79 MPa (dry) |
| Hardness | M99 (Rockwell) | R105 (Rockwell) | R118 (Rockwell) | R119 (Rockwell, dry) |
| Density | 1.30 g/cm³ | 1.05 g/cm³ | 1.20 g/cm³ | 1.14 g/cm³ |
| Price index | $$$$$ | $ | $ | $ |
| Machinability | 3/5 | 4/5 | 3/5 | 3/5 |
Related engineering guides
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PEEK CNC Machining Design Guide: Tolerances, Applications and RFQ Checklist
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RFQ guide for PEEK surgical guide CNC machining: material grade, non-implant vs implant context, sterilization exposure, burr control and documentation.
CNC machining service by country
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