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Description of ASTM-D618 2013ASTM D618 - 13Standard Practice for Conditioning Plastics for TestingActive Standard ASTM D618 | Developed by Subcommittee: D20.50 Book of Standards Volume: 08.01 ASTM D618Significance and Use 4.1 Conditioning of specimens is typically conducted: ( 1 ) for the purpose of bringing the material into equilibrium with normal or average room conditions, ( 2 ) simply to obtain reproducible results, regardless of previous history of exposure, or ( 3 ) to subject the material to abnormal conditions of temperature or humidity in order to predict its service behavior. 4.2 The conditioning procedures prescribed in this practice are designed to obtain reproducible results and have the potential to give physical values somewhat higher or somewhat lower than values under equilibrium at normal conditions, depending upon the particular material and test. Depending on the thickness, type of material and its previous history, it is possible that it would take 20 to 100 days or more to ensure substantial equilibrium under normal conditions of humidity and temperature. Consequently, conditioning for reproducibility must of necessity be used for general purchase specifications and product control tests. 1. Scope 1.1 In general, the physical and electrical properties of plastics are influenced by temperature and relative humidity in a manner that materially affects test results. In order to make reliable comparisons between different materials and between different laboratories, it is necessary to standardize the humidity conditions, as well as the temperature, to which specimens of these materials are subjected prior to and during testing. This practice defines procedures for conditioning plastics (although not necessarily to equilibrium) prior to testing, and the conditions under which they shall be tested. 1.2 For some materials, it is possible that a material specification exists that requires the use of this practice, but with some procedural modifications. The material specification takes precedence over this practice. Refer to the material specification before using this practice. Table?1 in Classification D4000 lists the ASTM material specifications that currently exist. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Note 1 This standard and ISO 291 address the same subject matter, but differ in technical content. ISO 291
describes only two temperature and humidity conditions for conditioning or testing, or both.
ASTM Standards D709 Specification for Laminated Thermosetting Materials D756 Practice for Determination of Weight and Shape Changes of Plastics Under Accelerated Service Conditions D4000 Classification System for Specifying Plastic Materials D5032 Practice for Maintaining Constant Relative Humidity by Means of Aqueous Glycerin Solutions E104 Practice for Maintaining Constant Relative Humidity by Means of Aqueous Solutions ISO Standard ISO291 Plastics--Standard Atmospheres for Conditioning and Testing Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.Keywords conditioning; humidity; plastics; temperature; ICS Code ICS Number Code 29.035.20 (Plastic and rubber insulating materials) DOI: 10.1520/D0618 ASTM International is a member of CrossRef. ASTM D618The following editions for this book are also available...This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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