Copper Nickel casting

[BBprecise]

Anybody here done any machining on C96400 copper nickel alloy? Machinability looks to be around a 20. Sandviks website puts it in the aluminum alloy (N) group at about 1300sfm. Seems awful high for something with a machinability index of 20.

[workmantm]

I don't have access to the alloy that I used to machine. Al-Ni-Bz, but that seems about right. I'd run up to 3000SFM in it and rough at .018/.025IPR all day turning.  Stuff loved a chip load to be put on it or it got gummy and hard to shear with the tool.  Especially milling. Gummy pushed over burrs were a huge problem before I started pushing the tools. I want to say it was C63000 alloys, but that data is stored on an old thumb drive that I can't get access to right now. 

 

Gcode may may have more insights on it. We talked about a similar alloy a while back that he was working on. 

[BBprecise]

Thanks WM. I've cut almost pure copper before and I usually run slow sfm and high chiploads to prevent big burrs. I though the nickel would make it a little harder to machine, but from what I can find that's not necessarily the case. We'll find out soon enough.

 

Thanks.