Vicat Softening Temperature - ISO 306
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The temperature at which a 1mm2 flat-ended needle will penetrate 1mm into a material under a specified load and heating rate. The vicat softening temperature can be used to compare the heat-softening characteristics of different materials.
Four different methods may be used for testing.
Testing Methods
| Method |
Load (N) |
Heating Rate (°C/hr) |
| A50 |
10 |
50 |
| B50 |
50 |
50 |
| A120 |
10 |
120 |
| B120 |
50 |
120 |
ISO 10350 Note
ISO 10350 Vicat values are tested using the B50 method.
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