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.
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
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)"
>
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)
Each AWS classification of A-No. 8 analysis of table QW-442, shall require separate WPS qualification (QW404.37). |
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