Revised Standard from Last Update.

NATIONAL FOREWORD

This Indian Standard (Part 9) (Third Revision) which is identical to ISO 17639 : 2003 ‘Destructive tests on welds in metallic materials - Macroscopic and microscopic examination of welds’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Welding General and its Applications Sectional Committee and approval of the Metallurgical Engineering Division Council.

This standard was first published in 1966 and subsequently revised in 1973 and 1985. First revision of this standard was undertaken in 1973 to cover various tests on fusion welded joints and weld metals in steel. Second revision of this standard was undertaken in 1985 to bring the test and test requirements in line with the other international standards published so far by revising the standard in 9 Parts. The third revision of this standard has been undertaken to align it with the latest version of ISO 17639 : 2003 under dual numbering system.