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RE: [MW:8890] ELECTRODE - Change in AWS classification for weld overlay

By Materials & Welding
Mr. Kumar,
 

QW-404.37   is elaborated as below:-

A change in the composition of the deposited weld metal from one A-Number in table QW-442 to any other A-Number, or to an analysis not listed in the table. Each AWS classification of A-No. 8 or A-No. 9 analysis of table QW-442, or each nonferrous alloy in table QW-432, shall require separate WPS qualification. A-Numbers may be determined in accordance with QW-404.5.

The above clause is an essential variable in overlay qualification,Table QW-253.1.Hence the change is not allowed.

For your information 309L weld deposit have different chemical analysis and corrosion resistance as compared to 316L weld metal.Hence where 316L weld is deemed as necessary  for corrosion resistance ,309L can never be a substitute.

Hope this would clarify your doubt.

Pradip Goswami,P.Eng.
Welding & Metallurgical Specialist & Consultant
Email-pgoswami@sympatico.ca,
 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of manpreet
Sent: Wednesday, December 22, 2010 9:27 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:8888] ELECTRODE - Change in AWS classification for weld overlay

Hi Kumar,

If you are qualifying WPS in accordance with ASME sec ix, it does't permit to do so, QW 404.37 is one thing also if you see not (9) of QW-453, Chemical analysis is one of the required tests.

In short, a WPS qualified with 316L for clad layer can be used for 316L clad layer only.


Regards
Manpreet Singh
Welding Engineer




On Wed, 22 Dec 2010 14:13:46 +0530 "Bathula Raghuram (Mumbai - PIPING)" wrote
>

Please read carefully QW404.37, in case of weld overlay AWSclassification will be an essential variable

From:materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] OnBehalf Of Karthik
>Sent: Wednesday, December 22, 2010 10:58 AM
>To: materials-welding@googlegroups.com
>Subject: RE: [MW:8872] ELECTRODE - Change in AWS classification for weldoverlay

E309-L and E316L are both same F number(5) and A number (8),SFA number 5.4. So it is acceptable.

Thanks & Regards,

(Karthik)


> --- On Wed, 12/22/10, Bathula Raghuram (Mumbai - PIPING) <R.Bathula@ticb.com> wrote:


> From: Bathula Raghuram (Mumbai - PIPING) <R.Bathula@ticb.com>
> Subject: RE: [MW:8868] ELECTRODE - Change in AWS classification for weld overlay
> To: "'materials-welding@googlegroups.com'" <materials-welding@googlegroups.com>
> Date: Wednesday, December 22, 2010, 12:09 PM

Each AWS classification of A-No. 8 analysis of table QW-442, shall require separate WPS qualification (QW404.37).
>
> -----Original Message-----
> From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of KUMAR
> Sent: Wednesday, December 22, 2010 10:26 AM
> To: materials-welding@googlegroups.com
> Subject: [MW:8866] ELECTRODE
>
> Dear sir,
>
In weldoverlay smaw process welding, the changing electrode E309L in   place of E316L is acceptableor not? It mentioned in WPS that E309L   is for barrier Layer and E316L for clad layer
>
> Thanks and regards
> M.Kumar
>
>
>
>
>
>


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The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

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