BS 4490 89th Edition, June 30, 1989
Methods for Micrographic Determination of the Grain Size of Steel
Includes all amendments and changes through Reaffirmation Notice , December 15, 2001
Additional Comments: W/D S/S BY BS EN ISO 643 * CONTAIN FOLDOUTS *
Published By:British Standards Institution (BSI)
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.