This standard ( Part II) covers requirements for two grades of oil hardened and tempered spring steel wire and valve spring wire ( unalloyed) used for general purposes and for highest dynamic stressed springs.
IS 4454 Pt.2-1975 history
1975IS 4454 Pt.2-1975 Specification for wire for cold formed springs Part II Oil-quenched and tempered spring wire and valve spring wire—non-alloy