GB/T 43316.4-2023 Measurement of environmental stress cracking (ESC) resistance of focused plastics by ball pressing or needle pressing. This standard applies to a variety of plastics, clearly states the principle of ball pressing or needle pressing method, and specifies test equipment, sample preparation, pressure operation, environmental conditions and result evaluation in detail. According to this standard, the ESC resistance of plastics can be accurately detected, providing a key basis for the selection of plastics in different environment application scenarios, helping plastic products resist environmental stress, prolong service life, and promote mass improvement of the plastics industry.