Re: [MW:29340] WELDING CONSUMABLE SELECTION FOR DISSIMILAR MATERIAL

309 is fine as our dear friend Mr. Dilintas pointed out.

You have to use Delong diagram or IIW diagram for this purpose.

The result depends on the filler metal as well as the welding process and dilution of 410SS.

I have used 309 but achieved better results with 310.

But this is not your main issue since you have to deal with 410 too.

For instance, do you require to PWHT 410 after welding or not (I recommend you to do it)...?

410 is a martensitic stainless steel and both preheat and PWHT is normally required.

So what is the problem with 309 or 310...?

If you use 309 or 310 then your weld will be austenite... 

But you have to apply PWHT (because of 410) and it might not be a good idea to expose an austenitic base metal (304 side) and austenitic weld metal to that temperature for that time period.

All this means that it might be better to use a Ni-base filler to buffer the 410, then apply PWHT

Then weld this assembly to the 304 with 309 or even 308 filler metal.

This way you have taken care of your 410 base metal and its need for PWHT

And you have not deteriorated your 304 base metal.

And you have a reliable joint

Regards

Ramin  Kondori

Sr. QA/QC & Welding Engineer

-----------------------------------------------------------

PG-Dip. in Welding Engineering (IWE  AT  0070)

BSc. in Civil Engineering (IUT)

BGAS Painting Inspector

ASNT Level I&II

                        

On Fri, Mar 22, 2019 at 2:58 AM George Dilintas <dilintas@gmail.com> wrote:

It is fine 

Στις Πέμ, 7 Μαρ 2019, 18:30 ο χρήστης Sunny Modi <modisunny007@gmail.com> έγραψε:

Dear All,

I have to weld SA 213 TP 304 tubes to SS 410 (plate) cladded on SA 266 cl 2 (forged tube sheet).

Which Filler Wire has to be used.

As per my calculation, I am going with 309 Mo, Is it OK ?

Please reply, its urgent.

Thanks and Regards

Sunny Modi

8130365765

Manager QA/QC

M/s MAPL

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