This standard (Part I) covers the requirements for patented, cold drawn round spring steel wire made from unalloyed steels and used for the manufacture of cold formed helical springs, spring-rings, and wire forms.
IS 4454 Pt.1-1981 history
1982IS 4454 Pt.1-1981 Specification for steel wire for cold-formed springs, Part I: Patented and cold-drawn steel wire—Nonalloy