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JSA - JIS G 0551

Steels –– Micrographic determination of the apparent grain size

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Organization: JSA
Publication Date: 22 June 2020
Status: active
Page Count: 45
ICS Code (Steels): 77.080.20
ICS Code (Other methods of testing of metals): 77.040.99
scope:

This 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.

NOTE 1 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.

NOTE 2 The International Standard corresponding to this Standard and the symbol of degree of correspondence are as follows.

ISO 643 : 2012 Steels - Micrographic determination of the apparent grain size (MOD)

In addition, symbols which denote the degree of correspondence in the contents between the relevant International Standards and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) according to ISO/IEC Guide 21-1.

WARNING Persons carrying out tests based on this Standard should be familiar with normal laboratory practice. This Standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this Standard to establish appropriate safety and health practices.

Document History

JIS G 0551
June 22, 2020
Steels –– Micrographic determination of the apparent grain size
This 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...
January 21, 2013
Steels - Micrographic determination of the apparent grain size
This Standard specifies a micrographic method of determining apparent ferritic or austenitic grain size in steels. Also, this Standard specifies the methods of revealing grain boundaries and...
January 20, 2005
Steel - Micrographic determination of the apparent grain size
A description is not available for this item.
February 20, 1998
Methods of Austenite Grain Size Determination for Steel
A description is not available for this item.
January 1, 1977
Method of Austenite Grain Size Test for Steel
A description is not available for this item.

References

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