该方法适用于铌含量在0005%（m/m）和1.3%（m/m）之间的钢类型。规定了原理、试剂、仪器、取样、程序、结果表达和试验报告。附件A包括关于国际合作测试的附加信息。附录B给出了精度数据的图形表示。

The method is applicable to types of steel with niobium contents between 0,005 % (m/m) and 1,3 % (m/m). Specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report. Annex A includes additional information on the international co-operative tests. Annex B gives a graphical representation of precision data.