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

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

09-30-1986

Publisher

British Standards Institution

National foreword
Method
1 Scope and field of application
2 Reference
3 Principle
4 Reagents
5 Apparatus
6 Sampling
7 Procedure
8 Expression of results
9 Test report
Annex
Precision data
Figures
1 Cation exchange column
2 Example of aluminium alloy heating block
3 Steam distillation apparatus

Describes a method for the spectrophotometric determination of nitrogen in steels. Intended to determine total nitrogen in very low nitrogen non alloy steels. May be used 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 manufactured without aluminium addition and then only in sheet material. Applicable to nitrogen contents from 0.0005 to 0.005%.

This EURONORM 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. This highly resistant nitride has been found only in samples of silicon steels manufactured 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.

Committee	ISE/1
DevelopmentNote	Also numbered as EN 10179 and EURONORM 179 Supersedes 82/71476 DC (09/2005)
DocumentType	Standard
Pages	14
PublisherName	British Standards Institution
Status	Current

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BS 6200-3.22.3:1986

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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