I have two sets of Spec's on Enfield steel.
S.A.F(Australianicon) and Britishicon O.F, the Oz spec's run from SAF 1 to SAF 11 and give the list of components for each.
The British spec's only give the analysis breakdown and need to be cross referenced against a known listing, such as the SAF series.

In OZ,BSS 5005/401 would equate to SAF No.7, BSS 5005/103 equates to SAF No.1 and DD8 equates to SAF No.7