BS 4490:1989被替代
Methods for micrographic determination of the grain size of steel
出版：British Standards Institution
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基本信息
标准编号： BS 4490:1989
发布时间：1989/6/30 0:00:00
标准类别：Standard
出版单位：British Standards Institution
标准页数：36
标准简介
Determination of ferrite or austenite grain sizes and the size of grains containing aggregate phases, e.g. pearlite. Methods for revealing the grain and for estimating the mean size of the microstructural constituent.
标准备注
© British Standards Institution 2013
Amendment notes:
AMD 6597 published 31 January 1991
AMD 8305 published 15 November 1994
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