Polymer / filler family, not a unique commercial grade. The cited named product is an example only.
Specific property examples
What distinguishes this material
Moisture conditioning changes dimensions and mechanical behavior. PA66 is distinct from cast PA6; dry molded resin data cannot stand in for conditioned machined stock.
Designation in this reference
PA66
Forms covered by the sources
Stock-shape rod / plate; confirm supplier process and dimensions
States to distinguish or confirm
Dry / conditioned state and storage humidity recorded
As machined versus equilibrated dimensions distinguished
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
nylon 66 · PA 6.6 · polyamide 66
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 TECAMID 66 natural: immersion test
Product / specimen
Machined stock-shape specimen, approximately Ø50 × 13 mm
Condition
Unfilled natural PA66; product-specific water-immersion test, not humidity-equilibrated tensile data
Test temperature / environment
23 °C
Values apply to the example above
Property
Value
Meaning and method
Water absorption, 24 h
0.2 mass %
manufacturer typical; not an acceptance limit DIN EN ISO 62; approximately Ø50 × 13 mm specimen
Water absorption, 96 h
0.4 mass %
manufacturer typical; not an acceptance limit DIN EN ISO 62; approximately Ø50 × 13 mm specimen
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.
Reviewed 23 October 2026. A source’s publication date and the review date are different. The scope below identifies the fields checked.
Ensinger TECAMID 66 natural, version AD 2023-07-19
Specific machined extruded stock-shape example. Absorption specimen approximately Ø50 × 13 mm at 23 °C, ISO 62; not a dry-molded resin strength guarantee.
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
The old 82.7 MPa dry figure and 1.2–1.5% absorption are not established for every PA66 stock shape.
Do not label directly-after-machining manufacturer data as moisture-equilibrated service properties.
Keep reinforcement and conditioning state with the product record. The comparison guide separates PA66 from POM instead of treating either name as a universal property set.