IS 5652 : Part 1 : 1993 /ISO 3738-1 : 1982 Hardmetals - Rockwell Hardness Test (Scale A) - Part 1 : Test Method

National Foreword

This lndian Standard ( Part 1 ) ( Second Revision ) which is identical with IS0 3738 : 1982 ‘Hardmetals - Rockwell hardness test ( Scale A ) - Part 1 : Test method’ issued by the International Organization for Standardization ( IS0 1, was adopted by the Bureau of Indian Standards on the recommendations of the Powder Metallurgical Materials and Products Sectional Committee ( MTD 25 1 and approval of the Metallurgical Engineering Division Council.

This Indian Standard was first published in 1972 and subsequently revised in 1981. The present revision has been brought out to affect harmonization with International Standards. The standard is now being issued in two parts. While this part of the standard covers test method, Part 2 of the standard ,interids to cover ‘Preparation and calibration of standard test block’.

The text of the IS0 standard has been approved as suitable for publication as an Indian Standard without deviations. Certain terminology and conventions are however, not identical with those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the number ‘IS0 3738’ appears, referring to this standard, it should be read as IS 5652: 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.