I have expirience with similar Super Duplex casted types (1.4417 /
1.4469 according to EN 10213, and 1.4470 according to SEW 410) because
i'm connected to a Foundry where they cast pump casings in these type
of alloys, and should say that weldability for both types is good when
you take the pre-cautions regarding interpass temperature and heat
treatment afterwards. Both EN 10213 and SEW 410 give guidelines for
welding and PWHT afterwards. For rough castings it's not a problem to
perform the mentioned Solution heat treatment afterwards but for
machined parts this could give a problem. Especially for such cases
it's important to keep your interpass temperature below 150 °C in
order to avoid undesirable microstructures afterwards.
This in contrast to the recommandations of Mr. Schutter in one of the
previous reactions.
Beside this it's important to use filler metals of similar composition
in order to guarantee corrosion resistance of weld metal similar to
the base metal, so when base metal consist Tungsten filler metal
should have this in the composition as well.
Best Regards,
Herman Pieper
On 9 apr, 12:16, "Bathula Raghuram \(Mumbai - PIPING\)"
<R.Bath...@ticb.com> wrote:
> I could not find any reference from major manufacturer like Sandvik,
> Avesta on S32760 grade.
> Can any body give inputs on S32760 in terms of weldability? Which one is
> better in terms of weldability?
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