[SEL] Stainless Steel ?

[peter ogborne]

We have a project ......the manufacture of a number of 150mm[ 6''] discs. 
These discs will be to a finished thickness of 2mm. We want a low creep 
stainless steel . The rotational speed of these discs will be in the 
vicinity of at least 20,000 rpm, hopefully more.They will be operating at 
saturated steam temps.
Locally we can only obtain 316 and a marine grade. Does any one know the 
creep characteristics of these two grades . The marine grade is no doubt a 
Ferritic grade. It may be a case of using what we can get ........there are 
over 60 grades i am told .
As you may gather we are building a steam turbine. I would really appreciate 
any help from anyone who has some knowledge .
Thanks
Peter Ogborne
Little Grove ,Albany
West Australia
''Heart of the Rainbow Coast ''
jopeter at omninet.net.au