Machining a Nozzle

Hello
I am custom building a reusable nozzle, and I was wondering which type of steel bar stock to purchase. I may purchase a High Temperature 309 Steel Bar. However, the nozzle will have to be bored from a lathe, and this type of steel is not easily machined. I did not choose graphite, because it is extremely expensive and messy to work with. The nozzle dimensions are roughly 1 1/2" x 3."
Any suggestions would be appreciated!

Cameron

Stainless Steel Bars
https://www.mcmaster.com/#standard-stainless-steel-bars/=wy92jw

Cameron

We do not use steel nozzles in sport rocketry, nor is the building of amateur motors appropriate for discussion in the public propulsion forum. If you are a high power certified senior member of NAR or TRA, and a US citizen you can request access to the private Research forum where such topics are discussed.

Bob Krech, TRF Administrator