IS 5791 : 2006 /ISO 6621-3 : 2000 Internal Combustion Engines - Piston Rings - Material Specifications

NATIONAL FOREWORD

This Indian Standard (Third Revision) which is identical with ISO 6621-3:2000 ‘Internal combustion engines — Piston rings — Part 3: Material specifications’ issued by the International Organization for Standardization (ISO) was adopted .by the Bureau of Indian Standards on the recommendation of the Automotive Primemovers Transmissions and Steering Systems and Internal Combustion Engines -Sectional Committee and approval of the Transport Engineering Division Council.

The Sectional Committee decided to align the Indian Standard with the corresponding International Standard wherever feasible and wherever the domestic considerations were not so intense so as to have standards different from the ISO Standards. This decision was taken with a view to upgrade the quality of the products in line with the International Standards.

This standard was first published in 1970 and subsequently revised in 1977 and then in 1986. The third revision was undertaken due to revision of base standard. In this revision, the following technical changes have been incorporated:

a) Table of Typical materials for piston rings had been modified.

b) Hardness in terms of Vickers, Rockwell and Brinell is given for respective materials.

c) Combinations of Typical modulus of elasticity and Bending strength is extended.

d) Typical applications for respective categories have been provided.