ISO 4158:1978 Preview
Ferrosilicon, ferrosilicomanganese and ferrosilicochromium -- Determination of silicon content -- Gravimetric method
This standard was last reviewed and confirmed in 2015. Therefore this version remains current.
The method is applicable to alloys containing from 8 to 95 % (m/m) silicon. Specifies principle, reagents, apparatus, sample, procedure, expression of results, reproducibility and test report. Warns of perchloric acid fumes.
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