IS 12211 : 2024/ISO 5949 : 1983 Tool Steels and Bearing Steels - Micrographic Method for Assessing the Distribution of Carbides Using Reference Photomicrographs
NATIONAL FOREWORD
This Indian Standard (First Revision) which is identical to ISO 5949 : 1983 'Tool steels and bearing steels - Micrographic method for assessing the distribution of carbides using reference photomicrographs' 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 first published in 1987. This revision has been undertaken to align it with ISO 5949 : 1983 under dual numbering system to harmonize it with the latest developments that have taken place at international level.
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.