Astm D61821 Pdf 2021 -

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

: Provide a universal language for describing how specimens were handled prior to testing. Standard Conditioning Procedures astm d61821 pdf

The "21" in the designation indicates that the most recent major revision was approved in . You can view or purchase the official document at the ASTM International website or through authorized distributors like the ANSI Webstore and Accuris Standards Store . Core Significance and Purpose Testing performance in extremely high-humidity environments

: Variations are strictly limited. For example, if a temperature tolerance of is required, the humidity tolerance must be within You can view or purchase the official document

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

: Predict how a material will perform under specific "abnormal" conditions, such as extreme heat or high humidity.

The standard, officially titled the " Standard Practice for Conditioning Plastics for Testing ," is a foundational document used in materials science to ensure that plastic specimens are prepared under uniform environmental conditions. Because the physical and electrical properties of plastics are highly sensitive to temperature and humidity, standardizing these variables is critical for obtaining accurate, repeatable, and comparable test results across different laboratories.