ASTM D648, ISO 75
Heat Deflection Temperature (Method B)
Purpose: This test method measures the heat deflection temperature at fixed stress/load.
Sample: ASTM bar, 5 x 0.5 x 0.125 inches; ISO bars, 80 x 10 x 4 mm
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Basic Description: The bars are placed under the deflection machine with 0.45 or 1.80 MPa load (66 or 266 psi). The samples are lowered into a silicone bath and tested at a controlled ramp rate until the end deflection is occurred. The temperature is recorded.
Method Publisher: https://www.astm.org/d0648-18.html
Keywords:
- Deflection temperature under load
- Heat deflection temperature
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