Astm D618-21 Pdf Jun 2026

that defines the protocols for conditioning plastics before testing. Because the physical and electrical properties of plastics are sensitive to temperature and humidity, standardizing these variables is critical for obtaining reproducible results and making reliable comparisons between different materials or laboratories. ASTM International The Core Purpose of Conditioning

The "-21" suffix indicates the standard was updated or reapproved in 2021. Recent revisions typically focus on: Clarification of humidity measurement tools. Updated tolerances for digital environmental chambers.

ASTM D618-21 sets the mandatory standard for conditioning plastics, ensuring reliable, comparable material testing by controlling temperature and humidity to eliminate environmental variability. It establishes protocols like Procedure A (40-hour conditioning) to standardize mechanical property evaluations, which are critical for quality control in manufacturing and material research. Purchase the standard from the official ASTM International website.

Selection of the appropriate procedure depends on the material type and the specific test requirements. As a reference point, achieving full moisture equilibrium in some plastics can take an exceptionally long time, from . astm d618-21 pdf

Heating to a specific temperature (e.g., 50°C or 105°C) for a set duration, then cooling in a desiccator.

– Purchase directly: https://www.astm.org/d0618-21.html Price (as of 2024–2025): ~$58 USD (PDF) or ~$52 (print)

Plastics have a relatively low Glass Transition Temperature ( Tgcap T sub g that defines the protocols for conditioning plastics before

To ensure that test results are accurate and reproducible across different laboratories globally, the industry relies on a fundamental standard: . The latest active revision of this standard is ASTM D618-21 .

While ISO 291 is a related standard, remains the definitive, more comprehensive guide for plastics in the North American and international markets. 5. How to Obtain the ASTM D618-21 PDF

2021

Check the material data sheet or target test standard (e.g., ASTM D638 for tensile testing) to identify the required conditioning procedure.

Lists companion standards, including ASTM E41 (Terminology Relating to Conditioning) and ISO 291.