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ISO 643

Steels — Micrographic determination of the apparent grain size

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Organization: ISO
Publication Date: 1 December 2019
Status: active
Page Count: 26
ICS Code (Other methods of testing of metals): 77.040.99
scope:

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.

Document History

ISO 643
December 1, 2019
Steels — Micrographic determination of the apparent grain size
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...
December 15, 2012
Steels - Micrographic determination of the apparent grain size
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...
February 15, 2003
Steels - Micrographic Determination of the Apparent Grain Size
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...
January 1, 1983
Steels - Micrographic Determination of the Ferritic or Austenitic Grain Size
A description is not available for this item.

References

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