本文件规定了一种基于对比图的显微摄影方法，用于确定度数 非合金和低合金线材或棒材退火后碳化物的球化 冷镦和冷挤压用钢。碳含量的范围高达1.20%C。购买本文件时可获得的所有现行修订均包含在购买本文件中。

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.All current amendments available at time of purchase are included with the purchase of this document.