This standard is issued under the fixed designation D ; the number 1 These test methods are under the jurisdiction of ASTM Committee D20 on. Plastics. ASTM D test assesses the energy required to crack or break rigid plastics sheeting and profile flat sections employed in building products. Learn more. Purchase your copy of ASTM D – 16 as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards available.
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Gardner Impact ASTM D, D
Send us a request Need help or have a question? A weight is raised inside a guide tube to a predetermined height, then released to drop onto the top of the impactor, forcing the nose through the test sample. An “impactor” sits on top of the test sample with a nose of specified radius in contact with the center of the test sample. Falling dart impact, also known as Gardner impact, is a traditional method for evaluating the impact strength or toughness of a plastic material.
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If a test sample fails, the drop height is decreased by one unit. Auditing Consulting Sourcing Training.
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The geometric uniqueness of the impactor head configurations prevents any comparison or correlation of testing results on samples tested with differing impactor head configurations.
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Gardner Impact ASTM D4226, D5420
satm The test sample rests on a base plate over an opening of specified diameter. For optimum results using the staircase method, a minimum of 30 test samples are necessary. 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.
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D422 Version s – view previous versions of standard. There is no known ISO equivalent to this standard. Any flat specimens can be tested – the preferred test sample is a mm 4″ disk or plaque. The most common method to analyze this data is called the “Bruceton Staircase” method. Compound qualification, finished product quality control, environmental and weatherability research and development studies, and fabrication tolerance prediction constitute useful applications.
Then a series of 20 impacts are conducted. Standards can be obtained from appropriate standards authorities. The test is often used to specify appropriate c4226 for applications involving impact or to evaluate the effect of secondary finishing operations or other environmental factors on plastic impact properties.
These notes and footnotes excluding, those in tables in figures shall not be considered as requirements of this standard.
ASTM D4226 – 16
In general, the conical impactor, C. Testing Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards. Through our network of over 43, people in 1, laboratories and offices in countries, Intertek provides quality and safety solutions to a wide range of industries around the world. If a test sample passes, the drop height is increased by one unit. Link to Active This link will always route to the current Active version of the standard.
Specific precautionary statements are given in Section 8. Equivalent surface conditions are more likely to occur when specimens are prepared by compression molding or extrusion than by injection molding.