I don't know the specific answer, but you are likely to find it in either this free huge compendium, The Machining Data Handbook, or by asking the people who compile it and keep it up to date. Link at the end:
"This handbook was compiled by the Technical Staff of the Machinability Data Center A DoD Information Analysis Center Sponsored by the Army Materials and Mechanics Research Center, to help engineers and professional in corresponding fields get the accurate datas on machining processes."