Good afternoon all, Does anyone know if any of the ASTM standards cover the same test as IEC/UL/CSA 60950-22 Cl. 8.5 Annex D.3 Compression Test and CSA No. 94-M91 Cl. 6.2.5 Gasket Test below: The set of specimens of gasket material shall be tested to the requirements of a), b) and c) (see Figure D.1). On completion of each test, the specimens shall not show signs of deterioration or cracks that can be seen with normal or corrected vision. a) A cylindrical weight sufficient to apply 69 kPa shall be placed on the middle portion of each specimen for a period of 2 h. At the end of that time the weight shall be removed and the specimen allowed to rest at a room temperature of 25 °C * 3 °C for 30 min. The thickness of the gasket shall then be determined and compared with a measurement obtained before the application of the weight. The compression set shall not exceed 50 % of the initial thickness of the specimen. b) Following the test specified in a), the same specimens shall be suspended in an air oven at a temperature of 70° C for a period of 5 days. The specimens shall then be tested for compliance with a), approximately 24 h after removal from the oven. c) Following the test specified in b), the specimens shall be cooled to a temperature of -30 °C for a period of 24 h and then subjected to an impact >from a hammer of 1,35 kg mass falling from a height of 150 mm upon removal from the cold chamber. The hammer head shall be steel, 28,6 mm in diameter and have a flat striking surface, 25,4 mm in diameter with slightly rounded edges. The specimens being tested shall be placed on short lengths of 50 mm by 100 mm minimum wooden pieces (clear spruce) when being impacted. Following the impact the specimens shall be examined for evidence of cracking or other adverse effects. The test shall be continued and the specimens impacted every 24 h for two more days. The specimens shall then be removed from the cold chamber, allowed to rest at a room temperature of 25 °C * 3 °C for approximately 24 h, and then again tested for compliance with a). On reviewing numerous gasket data sheets, there is a lot of references to ASTM D1056 and ASTM D746 listed. It appears these may be similar tests. Can you anyone confirm/deny or provide more information? Any advice is much appreciated. Regards, Craig -
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