Polymer / filler family, not a unique commercial grade. The cited named product is an example only.
Specific property examples
What distinguishes this material
PEEK identifies the polymer; TECAPEEK natural is one stock-shape product. Its data cannot represent filled, implant-qualified, reused, injection-molded or differently annealed PEEK.
Designation in this reference
Polyetheretherketone (PEEK)
Forms covered by the sources
Stock-shape rod / plate; confirm supplier process and dimensions
States to distinguish or confirm
Exact compound, color and additives recorded
Extruded / molded route and stress relief recorded
Temperature and exposure
Melting point, glass-transition temperature, heat-deflection test and long-term service rating are different quantities. Use a grade-specific value with its load, duration and test conditions.
Other search names in these sources
unfilled PEEK
Read the scope above: a source’s related product name is not a blanket interchangeability statement.
Property evidence for a stated condition
Read the complete example before using a number. Typical values are not guaranteed limits. Missing test conditions remain visible.
Specific source example
Ensinger TECAPEEK natural: immersion test
Product / specimen
Unfilled PEEK stock-shape reference sample in manufacturer comparison brochure
Condition
Named stock-shape product; test-sample result, not an in-service saturation or family-wide value
Test temperature / environment
23 °C
Values apply to the example above
Property
Value
Meaning and method
Water absorption, 24 h
0.02 mass %
manufacturer typical; not an acceptance limit DIN EN ISO 62; brochure does not state specimen geometry in the extracted table
Water absorption, 96 h
0.03 mass %
manufacturer typical; not an acceptance limit DIN EN ISO 62; brochure does not state specimen geometry in the extracted table
Which manufacturer, exact grade, filler fraction and stock form are specified?
What moisture conditioning, direction, test method and service temperature apply?
For machining, take the exact grade, supplied condition and measured hardness where applicable into the tool maker’s application data. A generic material-family speed is not a substitute for an operation and tool-specific recommendation.
Source identity, a named product example and a supplied-batch certificate are different evidence. Cross-standard similarity does not approve substitution.
Corrections from the previous article
Remove metal-like stiffness and highest common thermoplastic temperature superlatives.
Replace the old universal 100 MPa / 250 °C assertions with scoped product evidence.
Compare carbon-filled and glass-filled records with the unfilled product basis. Filler, orientation and specimen condition remain part of the comparison.