Heat Deflection Tester

IS 2267 – 1972 Specification for Polystyrene Moulding Materials.

ASTM  D 1238 – 1982 Standard Test Method for Flow Rates of Thermoplastics by Extrusion Plastometer.

Technical Details

Dimensions of the test specimen	3 to 4.2 mm wide,9.8 to15 mm thick,120 ± 10 mm long
Distance between supporting edges	100 ± 2 mm
Radius of supporting and loading edges	3.0 ± 0.2 mm
Temperature	Up to 300°C (least count 1°C)