This standard specifies the micrographic method of determining apparent ferritic or austenitic grain sizes of steels.
DIN EN ISO 643:2003 history
2023DIN 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).
2023DIN EN ISO 643:2023 Steels - Micrographic determination of the apparent grain size (ISO/DIS 643:2023); German and English version prEN ISO 643:2023
2020DIN 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
2020DIN EN ISO 643:2020 Steel - Micrographic determination of the apparent grain size (ISO/DIS 643:2017); German and English version prEN ISO 643:2017
2017DIN EN ISO 643:2017 Steel - Micrographic determination of the apparent grain size (ISO/DIS 643:2017); German and English version prEN ISO 643:2017
1970DIN EN ISO 643 E:2015-06 Photomicrographic determination of apparent grain size of steel (draft)
2013DIN EN ISO 643:2013 Steels - Micrographic determination of the apparent grain size (ISO 643:2012); German version EN ISO 643:2012
2003DIN EN ISO 643:2003 Steels - Micrographic determination of the apparent grain size (ISO 643:2003); German version EN ISO 643:2003
1985DIN 50601:1985 Metallographic examination; determination of the ferritic or austenitic grain size of steel and ferrous materials