Approved Work Item
ISO/AWI 306
Plastics — Thermoplastic materials — Determination of Vicat softening temperature (VST)
Reference number
ISO/AWI 306
Edition 7
© ISO 2026
Approved Work Item
Under development
A working group has prepared a draft.
Will replace ISO 306:2022

Abstract

This document specifies four methods for the determination of the Vicat softening temperature (VST) of thermoplastic materials:

—    Method A50 using a force of 10 N and a heating rate of 50 °C/h;

—    Method B50 using a force of 50 N and a heating rate of 50 °C/h;

—    Method A120 using a force of 10 N and a heating rate of 120 °C/h;

—    Method B120 using a force of 50 N and a heating rate of 120 °C/h.

The methods specified are applicable only to thermoplastics, for which they give a measure of the temperature at which the thermoplastics start to soften rapidly.

General information

  • Status
     : Under development
    Stage
    : New project registered in TC/SC work programme [20.00]
  • Edition
     : 7
  • Technical Committee :
    ISO/TC 61/SC 2
  • RSS updates

Life cycle

Sustainable Development Goals

This standard contributes to the following Sustainable Development Goal

9
Industry, Innovation and Infrastructure

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