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Super Duplex SS F53 S32750 vs F55 S32760

Super Duplex SS F53 S32750 vs F55 S32760

(OP)
What is the difference between these two grades, if any? And what could be the reason for picking one over the other?

As far as I could see, F55 has tungsten in its chemical composition.

RE: Super Duplex SS F53 S32750 vs F55 S32760

They are two different ways of trying to reach the same level of corrosion resistance.
There are a lot of papers on the heat treating and corrosion testing of these alloys.

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P.E. Metallurgy, Plymouth Tube

RE: Super Duplex SS F53 S32750 vs F55 S32760

I think people tend to use them interchangeably, based on what is most available.

If it is a new, and critical, application I personally would have greater faith in the validity of the Swedish-generated corrosion data for S32750.

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