3D materials

Dear all,

Currently I'm designing a pump impeller that has to be 3D printed. The impeller rotates with 2300 RPM and has a diameter of 200 mm.

I'd like to have some advise on usable materials for 3D printing.

Thanks,
René

The materials from Shapeways are offered for decorative purposes only. I doubt seriously that any of them would withstand the torque stresses that such an impeller will be subjected to, with the possible exception of the Aluminum material.
https://www.shapeways.com/materials/aluminum?li=nav

But, aluminum is going to be _expensive_. You could easily be looking at $3000-$5000