Heat Deflection Temperature of Plastics - Free download as PDF File (.pdf), Text File (.txt) or read online for free. HDTA/icat Tester The tester is used to determine the Heat Deflection Temperature or the Vicat Softening Point. HDT/VA3216 ranks top-class in the world, which“Heat deflection temperature” can be defined as the temperature at which a standard test sample deforms (bends) under a predefined load. Centexbel-VKC | Etienne Definition: Heat deflection temperature (HDT or heat distortion temperature is defined as the temperature at which an arbitrary deformation (0.010 inch) occurs This temperature is recorded as the deflection temperature under flexural load 7.1.5 Temperature Measurement System NOTE 4—A liquid heat-transfer medium It was concluded that the flexural strength, flexural modulus, tensile modulus and heat deflection temperature of wood flour/recycled polyethylene green Scope: Heat deflection temperature is defined as the temperature at which a standard test bar deflects a specified distance under a load.