SIS SS-EN 10 179-1989 化学分析有色金属材料．测定钢中的氮（痕量）分光光度法

标准号：SIS SS-EN 10 179-1989
中文标准名称：化学分析有色金属材料．测定钢中的氮（痕量）分光光度法
英文标准名称：Chemical analysis of ferrous materials — Determination of nitrogen (trace amounts) in steel — spectrophotometric method
发布日期：1989/6/7 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：This EU RONORM 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.