Vicat softening temperature or Vicat hardness is the determination of the softening point for materials that have no definite

melting point The melting point (or, rarely, liquefaction point) of a substance is the temperature at which it changes state from solid to liquid. At the melting point the solid and liquid phase exist in equilibrium. The melting point of a substance depen ...

, such as

plastics Plastics are a wide range of synthetic or semi-synthetic materials that use polymers as a main ingredient. Their plasticity makes it possible for plastics to be moulded, extruded or pressed into solid objects of various shapes. This adaptabi ...

. It is taken as the temperature at which the specimen is penetrated to a depth of 1 mm by a flat-ended needle with a 1 mm² circular or square cross-section. For the Vicat A test, a load of 10 N is used. For the Vicat B test, the load is 50 N. Standards to determine Vicat softening point include

ASTM ASTM International, formerly known as American Society for Testing and Materials, is an international standards organization that develops and publishes voluntary consensus technical standards for a wide range of materials, products, systems, an ...

D 1525 and ISO 306, which are largely equivalent.Vicat Softening Point: Definition
The vicat softening temperature can be used to compare the heat-characteristics of different materials. Four different methods may be used for testing. ISO 10350 Note ISO 10350 Vicat values are tested using the B50 method. Similar Standards: ASTM D1525

References

{{DEFAULTSORT:Vicat Softening Point Cement Polymer chemistry