本文件规定了一种基于对比图的显微照相方法，用于测定冷镦和冷挤压用非合金钢和低合金钢制成的线材、线材或棒材退火后的碳化物球化程度。碳含量范围高达1.20%C。 此外，附录A包括一种基于机器视觉的常规测量方法。

This document 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.