PEEK Unfilled: High-Performance Thermoplastic for Extreme Environments
ASTM D6262 · Published: 2026-06-03 · Updated: July 2026
PEEK (polyetheretherketone) is the highest-performing melt-processable thermoplastic — offering continuous service at 260°C, exceptional chemical resistance, and mechanical properties approaching aluminum. It is specified for aerospace brackets...
PEEK (polyetheretherketone) is the highest-performing melt-processable thermoplastic — offering continuous service at 260°C, exceptional chemical resistance, and mechanical properties approaching aluminum. It is specified for aerospace brackets replacing aluminum (weight savings), semiconductor wafer handling components, medical implantables, and oil & gas downhole connectors.
Quick Facts
| Category | Thermoplastics |
| Standard | ASTM D6262 |
| Density | 1.32 g/cm³ |
| Yield Strength | 100 MPa |
| Tensile Strength | 100 MPa |
Global Equivalents & Cross-Reference
| Alternative Standard / Grade | Action |
|---|---|
| Victrex PEEK 450G | Compare |
| Tecapeek | Compare |
| KetaSpire KT-820 | Compare |
Related Materials
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Frequently Asked Questions
What makes PEEK processing different from standard thermoplastics?
PEEK requires: (1) melt temperature 360-400°C — standard machines limited to 350°C cannot process it; (2) mold temperature 160-200°C (oil-heated, not water); (3) drying at 150°C for 3-4 hours to <0.02% moisture; (4) careful cooling rate control — crystallinity (and thus mechanical properties) depends directly on cooling rate from the melt.
References & International Standards
- ASTM International. Standard Specifications for Steel & Metal Alloys. astm.org
- International Organization for Standardization (ISO). Metallic Materials — Cross-Reference Database. iso.org
- American Iron and Steel Institute (AISI). Steel Grade Designations & Equivalents. steel.org
- European Committee for Standardization (CEN). EN Steel Standards & Numbering System. cencenelec.eu