Re: [MW:20629] Welding of Super Duplex SS

Dear all,

The %Fe is now under total control. Good Welding practice made it possible. Thanks for your help.

On Tue, Apr 1, 2014 at 10:47 PM, Hrushikesh Sangamnerkar <hrushi612@gmail.com> wrote:

Dear all,
After doing flush grinding with buffing wheel the ferrite obtained is between 50-52%Fe.

Can a 1mm difference from the final layer to flush grinding affect the %Fe?

On Mar 31, 2014 7:14 PM, "Hrushikesh Sangamnerkar" <hrushi612@gmail.com> wrote:

Its specified max. Value

On Mar 31, 2014 3:34 AM, "Kostas Migiakis" <kmigiakis@gmail.com> wrote:

is this the specified maximum value or the actual measured value during welding?

On Sun, Mar 30, 2014 at 6:16 AM, Hrushikesh Sangamnerkar <hrushi612@gmail.com> wrote:

Heat input max.is 1.5

On Mar 30, 2014 4:00 AM, "Kostas Migiakis" <kmigiakis@gmail.com> wrote:

100% Ar may be the reason of having high ferrite content on your welds.

You need to add a γ-stabilizer element (such as Nitrogen) in your weld pool if you want to increase austenite amount in the microstructure. 

Ar+2N is common for this welds. There are cases where Ar+5N has been used (but in these cases there is danger of porosity)

By the other hand did you do strict control on Heat Input?

What was the value of HI?

Best Regards

Dr. Kostas Migiakis

Materials & Welding

29 Μαρ 2014, 14:45, ο/η Hrushikesh Sangamnerkar <hrushi612@gmail.com> έγραψε:

Pure Argon is to be used for this material. We had asked for Ar+2%N mixture but customer had rejected.

On Mar 29, 2014 5:27 PM, "Kostas Migiakis" <kmigiakis@gmail.com> wrote:

Dear Hrushikesh

What type of gas mixture did you use for the specific welds?

Best Regards

Dr. Kostas Migiakis

Materials & Welding

28 Μαρ 2014, 18:22, ο/η Hrushikesh Sangamnerkar <hrushi612@gmail.com> έγραψε:

Hi all,

Base Metal: SUS 329J4L

Filler Metal: WEL TIG 329J4LT

Process: GTAW

Ferrite required (%Fe): 30-55%

Presently the ferrite obtained is on higher side.

%Fe=60-65.

Wanted good welding practice if any one worked with this material. Kindly help with some literature for the same.

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Hrushikesh H Sangamnerkar

09724738118

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Hrushikesh H Sangamnerkar

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