Material Selection for VSM Tube

[Fungiss]

I am designing temperature varying tube for VSM, especially high temperature. I don't have any experience on materials for this component. Please give me your idea about choosing material.

Requirements for the tube is :shy::
- easy for machining
- to use for medium vacuum (10^-4 Torr).
- nonmagnetic material
- to use in temperature range of 100 - 1100 K
- diameter of 20 - 35 mm; thickness of ~ 1 mm

Thanking you!

 

[tospok]

I don't know what is VSM, but austenitic steels can be helpful.