I don't know what is in the 9th edition, but the tenth edition has several S-N curves on page 39 for specific grades. None of which are 60-40-18 or 65-45-12. On page 47 in has a band for S-N data but the band is about 10ksi wide. (i.e. typical values). From this a person might make a reasonable...
I too need this data but haven't had the time to track it down yet. I found a reference in a source but don't know how good it is.
J.F.Janowak, A.Alagarsamy, and D. Venugoplalan, "Fatigue Strength of Commercial Ductile Irons.", Transactions, American Foundrymen's Society, Vol 98...