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ISO 9441:1988 Steel -- Determination of niobium content -- PAR spectrophotometric method
standard by International Organization for Standardization, 12/01/1988
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Full Description
The method is applicable to types of steel with niobium contents between 0,005 % (m/m) and 1,3 % (m/m). Specifies principle, reagents, apparatus, sampling, procedure, expression of results and test report. Annex A includes additional information on the international co-operative tests. Annex B gives a graphical representation of precision data.