Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations waross on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Which Design Code: S-N Curves for Stainless Welds

Status
Not open for further replies.

mousemat

Mechanical
Feb 12, 2015
10
Hi All,

I will be analysing the fatigue life of the structure using the nominal stress approach. The structure is comprised of stainless steel (not sure what grade yet) thin wall hollow sections connected using welds.

My problem is that I don't know which standard has a list of weld details and associated S-N curves that are applicable to stainless steel.

From the research I have done it appears there are no standards with this information and that for fatigue analysis purposes the S/S member welded connection is to be considered as if it was instead C-Mn. For example DNV RP C203 states:

"For Duplex and for Super Duplex steel one may use the same
classification as for C-Mn steels.
Also for austenitic steel one may use the same classification as
for C-Mn steels."

All well and good but unless I'm missing something the weld detail list and associated S-N curves published in DNV RP C203 are not applicable to C-Mn weld details.

So if anyone has any suggestions as to an applicable standard I'd be very grateful.

(PS: I posted this in the Metals and Metallurgy forum which I think was the wrong place)

Thanks
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor