Access over 120,000 technical material datasheets with Prospector!
创建您的免费帐号
Heat Deflection Temperature (HDT) - ISO 75
The temperature at which a test specimen deflects a specified amount when loaded in 3-point bending at a specified maximum outer fiber stress. Deflection temperature is used to determine short-term heat resistance.
Method | Outer Fiber Stress (MPa) |
---|---|
A | 1.80 |
B | 0.45 |
C | 8.00 |
Testing is either performed using edgewise or flatwise specimen orientation. Testing parameters vary between the two configurations as shown below.
Orientation | Dimensions (mm) | Span (mm) | Standard Deflection | Diagram |
---|---|---|---|---|
Edgewise | 120x9.8-15x3-4.2 | 100 | 0.32 | |
Flatwise | 80x10x4 | 64 | 0.34 |
ISO 10350 Note
ISO 10350 requires testing in the flatwise orientation.