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黑色金属材料的化学分析.钢中氮(痕量)的测定.分光光度测定法.德文版本 EN 10179:1989
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This standard specifies a method for the spectrophotometric 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.

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