BS 6200-3.22.3-1986 铁,钢和其他黑色金属抽样和分析.分析方法.氮的测定.钢:分光光度测定法(痕量)

标准号：BS 6200-3.22.3-1986
中文标准名称：铁,钢和其他黑色金属抽样和分析.分析方法.氮的测定.钢:分光光度测定法(痕量)
英文标准名称：Sampling and analysis of iron, steel and other ferrous metals - Methods of analysis - Determination of nitrogen - Steel: spectrophotometric method (for trace amounts)
标准类型：H11
发布日期：1986/9/30 12:00:00
实施日期：1986/9/30 12:00:00
中国标准分类号：H11
国际标准分类号：77.040.30
适用范围：This EURONORM specifies a method for the spectrophoto-metric determination of nitrogen in steels. The method is primarily intended for the determination of total nitrogen in very low nitrogen non-alloy steels. It may be used, however, for any low nitrogen ferrous alloy that is soluble in hydrochloric acid provided that the acid-resistant form of silicon nitride is not present. This highly resistant nitride has been found only in samples of silicon steels manu- factured without aluminium addition and then only in sheet material. The method is applicable to nitrogen contents from 0.0005 to 0.005% (m/m). NOTE —The method has also been successfully applied to a pure iron with a nitrogen content of 0.0038% (m/m) —see Annex.