thanks for both replies. chemistry is not a real issue in this instance. i've been using 3" 4340 bars. i'm just trying to get similar strength but, increase machinabilty.
SAE 41L42 is another grade with similar strength and machinability, and is commonly available due to its use in gear & bearing applications. You can obtain grades like 41L40 and 41L42 from cold-drawn bar suppliers like St. Louis Cold Drawn or LaSalle Steel. Use the following links for more information:
St. Louis Cold Drawn, Inc.
1060 Pershall Road
St. Louis, MO 63137 USA
Jack Webster - Manager of Sales
800.421.9320 phone
314.867.4304 fax