What is ISO 23825 about?

ISO 23825 specifies a micrographic method based on comparison charts for determining the degree of spheroidisation of carbides after annealing of wire rod, wire, or bars made of non-alloy and low alloy steels intended for cold heading and cold extrusion. The range of carbon content is up to 1,20 % C.

In addition, Annex A includes a method based on machine vision for routine measurements.

ISO 23825 specifies a test method for evaluating the degree of spheroidal carbide in CHQ wire (Cold Heading Quality wire).

Who is ISO 23825 for?

ISO 23825 on method for evaluating the nodularity of spheroidal carbides is beneficial for

Steel industries
Metallurgist
Metal testing laboratories

Why should you use ISO 23825?

The nodularity of spheroidal carbide is an important characteristic of steel for cold heading or cold extruding. However, the degree of spheroidization is assessed concerning an agreed series of standard images, which does not exist up to now as the subject of an international standard. Thus, there has been a continuing debate between supply and demand for the determination of the degree of spheroidization.

ISO 23825 provides information on sampling and sample preparation, evaluation methods, characterization of carbide particles using microscopic examination for determining the degree of spheroidisation of carbides.

As a user of ISO 23825, you can be ensured of the degree of spheroidisation of carbides which is very important for cold heading and cold extruding of steel. ISO 23825 assist the user in the micrographic method based on comparison charts it also helps the user in performing a test for evaluating the degree of spheroidal carbide in CHQ wire (Cold Heading Quality wire) this helps the user in improving the quality of his product and helps him to achieve greater business efficiency.

BS ISO 23825:2020

Method for evaluating the nodularity of spheroidal carbides. Steels for cold heading and cold extruding

Current, Under Review

Published:

31 Jan 2021