DIN EN ISO 643:2017 PDF

Scope: This International Standard specifies a micrographic method of determining apparent ferritic or austenitic grain size in steels. It describes the methods of revealing grain boundaries and of estimating the mean grain size of specimens with unimodal size distribution. Although grains are three-dimensional in shape, the metallographic sectioning plane can cut through a grain at any point from a grain corner, to the maximum diameter of the grain, thus producing a range of apparent grain sizes on the two-dimensional plane, even in a sample with a perfectly consistent grain size.

DIN EN ISO 643:2017 history

2023 DIN EN ISO 643:2023-08 Steels - Micrographic determination of the apparent grain size (ISO/DIS 643:2023); German and English version prEN ISO 643:2023 / Note: Date of issue 2023-07-07*Intended as replacement for DIN EN ISO 643 (2020-06).
2023 DIN EN ISO 643:2023 Steels - Micrographic determination of the apparent grain size (ISO/DIS 643:2023); German and English version prEN ISO 643:2023
2020 DIN EN ISO 643:2020-06 Steels - Micrographic determination of the apparent grain size (ISO 643:2019, Corrected version 2020-03); German version EN ISO 643:2020
2020 DIN EN ISO 643:2020 Steel - Micrographic determination of the apparent grain size (ISO/DIS 643:2017); German and English version prEN ISO 643:2017
2017 DIN EN ISO 643:2017 Steel - Micrographic determination of the apparent grain size (ISO/DIS 643:2017); German and English version prEN ISO 643:2017
1970 DIN EN ISO 643 E:2015-06 Photomicrographic determination of apparent grain size of steel (draft)
2013 DIN EN ISO 643:2013 Steels - Micrographic determination of the apparent grain size (ISO 643:2012); German version EN ISO 643:2012
2003 DIN EN ISO 643:2003 Steels - Micrographic determination of the apparent grain size (ISO 643:2003); German version EN ISO 643:2003
1985 DIN 50601:1985 Metallographic examination; determination of the ferritic or austenitic grain size of steel and ferrous materials