I just finished milling a part out of A36 steel using my Sherline Mini Mill and the mill seemed to be on its limit (or a little over it) while doing so. I was using a new HSS cutter. Does anyone have a suggestion regarding a more machineable steel (plate form as opposed to round bar)? Within reason, strength isn't a real issue with anything I make. 12L would probably be ideal but it does not seem to be available in plate form. 1018 looks to be easy to find but it appears to have the same machineability rating as the A36. If you do have a suggestion, could you please provide me with an internet source for the material? Thank you.