IS 6396 : 2023/ISO 3887 : 2017 Steels - Determination of the Depth of Decarburization
NATIONAL FOREWORD
This Indian Standard (Third Revision) which is identical to ISO 3887 : 2017 'Steels - Determination of the depth of decarburization' issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Metallography and Heat-Treatment Sectional Committee and approval of the Metallurgical Engineering Division Council.
This standard was originally published in 1971 and subsequently revised in 1983 and 2000. The third revision of this standard has been undertaken to align it with the latest version of ISO 3887 : 2017 under dual numbering system to harmonize it with the latest developments that have taken place at international level.
The changes in this version as compared to the previous edition are as follows:
a) The scope has been expanded from "non-alloy and low-alloy steels" to "steel products";
b) The definitions of "partial decarburization" and "complete decarburization" have been modified;
c) The term "depth of ferrite decarburization" has been deleted;
d) The terms "depth profile of carbon content" and "depth profile of hardness" have been added;
e) More measurement details for the micro-indentation hardness method have been added;
f) Two new methods of measuring the carbon depth profile, by GDOES and EPMA, have been added; and
g) Examples of typical decarburization microstructures have been added.
The text of ISO standard has been approved as suitable for publication as an Indian Standard without deviations. Certain terminologies and conventions are, however, not identical with those used in Indian Standard. Attention is especially drawn to the following:
a) Wherever the words 'International Standard' appear referring to this standard, it should be read as 'Indian Standard'; and
b) Comma (,) has been used as a decimal marker while in Indian Standards the current practice is to use a point (.) as the decimal marker.