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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For optimum results using the staircase method, a minimum of 30 test samples are necessary. There is no known ISO equivalent to this standard.
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Gardner Impact ASTM D4226, D5420
Then a series of 20 impacts are conducted. These notes and footnotes excluding, those in tables in figures shall not be considered as requirements of this standard.
Link to Active This link will always route to the current Active version of the standard. Send us a request Wilton UK: Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards.
Gardner Impact ASTM D, D
Send us a request Need help or have a question? Testing Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards.
The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered asfm. The most common method to analyze this data is called the “Bruceton Staircase” method.
In general, the conical impactor, C. The test sample rests on a base plate over an opening of specified diameter. Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Any flat specimens can be tested – the preferred test sample is a mm 4″ disk or plaque. The geometric uniqueness of the impactor head configurations prevents any comparison or correlation of testing results on samples tested with differing impactor head configurations.
Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes.
If a test sample fails, the drop height is decreased by one unit. Aztm confirming that your products and services meet all trusted external and internal standards.
Assurance Testing Inspection Certification. Historical Version s – view previous versions of standard. The test is often used to specify appropriate materials for applications involving impact satm to evaluate the effect of secondary finishing operations or other environmental factors on plastic impact properties.
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ASTM D4226 – 16
Falling dart impact, also known as Gardner impact, is a traditional method for evaluating the impact strength or toughness of a plastic material. Specific precautionary statements are given in Section 8. 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.
If a test sample passes, the drop height is increased by one unit.
Auditing Consulting Sourcing Training. Equivalent surface conditions are more likely to occur when specimens are prepared by compression molding or extrusion than by injection molding. An “impactor” sits on top astj the test sample with a nose of specified radius in contact with the center of the test sample. Compound qualification, finished product quality control, environmental and weatherability research and development studies, and fabrication tolerance prediction constitute useful applications.