However, you were the first to reply and I already cut it. I found a little program called ME consultant, It was very help full and it agrees with you

I was wondering if you had any experience with post heat treat machining of A2. It will be 40-45 RC. I have alum\tit\nitrate coated carbide cutters. I have heard that I should run them dry with air. But I am unsure of SFM and chip load. Any suggestions?
Have yourself Great M-Day weekend
Dan