Comparison b/w SS304L and SS409

Hi Everybody!

I just wanted your expert opinion regarding material selection. Can anybody guide me, out of Stainless steel SS409(AISI 409)and SS304L(AISI 304L), which one is better considering their usability for gas turbine exhaust stack?

Actually the gas turbine manufacturer is offering exhaust stack of gas turbine made out of SS304L, instead of SS409 as originally specified by the Consultant.

I wanted to know:

Will the offered material by gas turbine manufacturer (SS304L) makes any difference?

And considering SS304L and SS409, which material is most widely used in construction of gas turbine exhaust stack?

I have searched the web and found following site which offers comparison of various grades of Stainless steel including SS304L and SS409. But I am unable to draw any solid conclusion.

http://www.paawanstainless.com/prod_spe.html

Appreciate for any input in this regard.

Thanks

Adil Received on Thu Dec 14 11:34:00 2006