ISO 4158:1978 PDF
Ferrosilicon, ferrosilicomanganese and ferrosilicochromium — Determination of silicon content — Gravimetric method
Ferrosilicon, ferrosilicomanganese and ferrosilicochromium — Determination of silicon content — Gravimetric method
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 3
- Дата публикации:
- 1 декабря 1978 г.
- Издание:
- ISO IS 4158 edition 1 version 1
- ICS:
- 77.100
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.
Abstract
Overview
ISO 4158:1978 specifies a for the determination of silicon content in ferrosilicon, ferrosilicomanganese and ferrosilicochromium alloys. The method is applicable to alloys containing and covers principle, reagents, apparatus, sampling, procedure, expression of results, reproducibility and the required test report. The procedure uses oxidative fusion (sodium peroxide), acid decomposition and gravimetric isolation of silica, with a conversion factor to report silicon content. Note: the standard warns of hazards from when heated.
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