ASTM D648

ASTM D648 is a standard procedure used to determine the heat deflection temperature (HDT) of plastics, which is the temperature at which a plastic material begins to deform under a specified load. It helps assess how well a plastic can withstand heat in real-world conditions. The test involves heating a sample of the material under controlled conditions until it bends or deforms a certain amount. This information is valuable for designers and manufacturers to ensure plastics will perform safely and maintain their integrity when exposed to elevated temperatures in applications such as automotive parts, electrical components, or household goods.