UNE-EN ISO 643:2020
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
View Superseded by
Steels - Micrographic determination of the apparent grain size (ISO 643:2019, Corrected version 2020-03)
Hardcopy , PDF
English, Spanish, Castilian
14-10-2020
23-04-2025
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.
| Committee |
CTN 36
|
| DocumentType |
Standard
|
| Pages |
29
|
| PublisherName |
Asociación Española de Normalización
|
| Status |
Superseded
|
| SupersededBy |
| Standards | Relationship |
| EN ISO 643:2020 | Identical |
| ISO 643:2019 | Identical |
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