Astm D61821 Pdf May 2026

While is the technically equivalent international standard, there are notable differences:

Standard Practice for Conditioning Plastics for Testing - ASTM

Conditioning is rarely about reaching "perfect" equilibrium, as some plastics might require 20 to 100 days to fully stabilize. Instead, ASTM D618-21 provides a practical framework to: astm d61821 pdf

: Provide a universal language for describing how specimens were handled prior to testing. Standard Conditioning Procedures

: Variations are strictly limited. For example, if a temperature tolerance of is required, the humidity tolerance must be within For example, if a temperature tolerance of is

Understanding ASTM D618-21: The Standard for Conditioning Plastics

Assessing the impact of water immersion and moisture absorption. As specified by the material standard Procedure B in an oven 48 hours, followed

The standard outlines several specific procedures (A through E) tailored to different material types and testing requirements. Conditioning Environment Primary Use Case 40 hours ( thick) or 88 hours ( Standard laboratory atmosphere for general testing. Procedure B in an oven 48 hours, followed by cooling in a desiccator Accelerated drying and thermal conditioning. Procedure C distilled water

To maintain the integrity of these procedures, ASTM D618-21 mandates strict control over the laboratory environment: : Defined as relative humidity.

Testing performance in extremely high-humidity environments. Key Technical Specifications