Pdf: Astm D618-21
causes moisture absorption, which can act as a plasticizer, altering the stiffness and electrical insulation properties of certain polymers (like polyamides/nylon).
Specified periods (e.g., 40h or 88h) depend heavily on the thickness of the material.
Test the specimens immediately upon removal from the conditioning environment. If the testing machine is outside the conditioned room, transfer the specimens in sealed bags or desiccators to prevent ambient air from altering the material state.
: Meeting general purchase specifications and product control requirements. Core Conditioning Procedures
To wrap it all up, here’s a quick action plan for obtaining and using ASTM D618-21: astm d618-21 pdf
The standard provides several procedures, lettered , based on the material type and testing goals. The most widely used are:
The "21" suffix indicates the year of last approval—2021—meaning this version supersedes all previous revisions like D618-08 or D618-13.
The ASTM D618-21 standard is intended for use by:
To help me tailor this information or guide your next steps, let me know: causes moisture absorption, which can act as a
: Laboratories upgrading their older workflows can purchase a Standard + Redline package [1.6, 1.24]. This provides an automated comparison document showing every precise textual modification made between the historical version and the 2021 revision [1.6, 1.24].
: Bringing a material into a stable state with normal room conditions.
Report: ASTM D618-21 Standard Practice for Conditioning Plastics for Testing 1. Executive Summary
The standard, titled "Standard Practice for Conditioning Plastics for Testing," defines the procedures for conditioning plastic materials to ensure reproducible test results. Because temperature and humidity significantly affect the physical and electrical properties of plastics, this standard provides a consistent baseline for material comparisons across different laboratories. Key Conditioning Procedures If the testing machine is outside the conditioned
As they read through the document, they noticed that the standard specified a particular conditioning procedure for plastics, including a requirement for a controlled environment with a temperature of 23°C ± 2°C and relative humidity of 50% ± 10%. The team realized that the production area where the sheets were made had recently experienced a malfunction in the climate control system, which might have affected the sheets' properties.
is an internationally recognized standard practice published by ASTM International . It defines the procedures for conditioning plastics prior to, and sometimes during, testing. The primary purpose is to bring specimens to a consistent state of temperature and humidity, which reduces variability in test results. Why is Conditioning Important?
University or corporate engineering libraries often have subscriptions. Summary of ASTM D618-21 Requirements Document Type: Standard Practice Current Version: D618-21 (2021) Scope: Plastics (all types) Core Goal: Stabilize moisture and temperature
With this guide, you’re well-equipped to not only find and purchase the , but also to understand its broader significance in ensuring plastics testing accuracy. Whether you are in quality control, R&D, or manufacturing, this standard is your key to reproducible, reliable plastic testing.