Vicat softening point
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Vicat softening temperature or Vicat hardness is the determination of the softening point for materials that have no definite melting point, such as plastics. It is taken as the temperature at which the specimen is penetrated to a depth of Script error: No such module "val". by a flat-ended needle with a Script error: No such module "val". circular or square cross-section. For the Vicat A test, a load of Script error: No such module "val". is used. For the Vicat B test, the load is Script error: No such module "val".. It is named after the French engineer Louis Vicat.
Standards to determine Vicat softening point include ASTM D 1525 and ISO 306, which are largely equivalent.[1]
The vicat softening temperature can be used to compare the heat-characteristics of different materials.
Four different methods may be used for testing.
| Method | Load | Heating rate |
|---|---|---|
| <templatestyles src="Nobold/styles.css"/>(N) | <templatestyles src="Nobold/styles.css"/>(°C/h) | |
| 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.
Similar Standards: ASTM D1525
References
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