ISO 643:2019
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Steels — Micrographic determination of the apparent grain size
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
22-08-2024
English, French
12-12-2019
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This document 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 |
ISO/TC 17/SC 7
|
| DocumentType |
Standard
|
| Pages |
21
|
| PublisherName |
International Organization for Standardization
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes | |
| UnderRevision |
| Standards | Relationship |
| NF EN ISO 643 : 2020 | Identical |
| DIN EN ISO 643:2020-06 | Identical |
| EN ISO 643:2020 | Identical |
| I.S. EN ISO 643:2020 | Identical |
| BS EN ISO 643:2020 | Identical |
| NEN-EN-ISO 643:2020 (Cor. 2020-08) | Identical |
| UNI EN ISO 643:2020 | Identical |
| ÖNORM EN ISO 643:2020 06 01 | Identical |
| NS-EN ISO 643:2020 | Identical |
| PN-EN ISO 643:2020-07 | Identical |
| IS 4748 : 2021 | Identical |
| UNE-EN ISO 643:2020 | Identical |
| DS/ISO 643:2019 | Identical |
| DS/EN ISO 643:2020 | Identical |
| I.S. EN ISO 643:2020&LC:2020 | Identical |
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