1.1 This standard ( Part I ) covers rationalized list of steels for use by automobile and ancillary industry.
1.1.1 This list does not include the following categories of steels:
a) Spring steels,
b) Stainless and heat-resisting steels,
c) Ball-bearing steels, and
d) Tool steels.
IS 9175 Pt.1-1979 history
1979IS 9175 Pt.1-1979 Chemical Composition of Steel for Rationalization of Automobile and Supporting Industries Part 1