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)

Sampling and analysis of iron, steel and other ferrous metals - Methods of analysis - Determination of nitrogen - Steel: spectrophotometric method (for trace amounts)

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标准号

BS 6200-3.22.3-1986

发布日期

1986年09月30日

实施日期

1986年09月30日

废止日期

无

中国标准分类号

H11

国际标准分类号

77.040.30

发布单位

GB-BSI

被代替标准

Handbook 19-1970

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.