A: For Cycle A (standard), a minimum of 40 hours, but moisture equilibrium may take longer (e.g., 4 days for thick nylon bars).

As an official ASTM International standard, the document is copyrighted. You can purchase the for immediate download through the ASTM International website or authorized resellers like IHS Markit or ANSI. Key Takeaways for Compliance:

ASTM D618-21 is a critical standard for the plastics industry, providing guidelines for conditioning and testing plastics to ensure their quality, performance, and reliability. By understanding the purpose and key aspects of this standard, industries can ensure compliance with regulatory requirements, reduce product failures, and improve overall product quality. Whether you are a manufacturer, supplier, or end-user of plastics, ASTM D618-21 is an essential resource to ensure the optimal performance of plastic materials.

The "21" suffix indicates the year of last approval—2021—meaning this version supersedes all previous revisions like D618-08 or D618-13.