Making WPS from PQR of CLAD material.

[Hareesh K V]

Dear all,

we have qualified a PQR (groove weld) for clad material (SA 240 410S (Clad) to Carbon Steel that is P7 to P1 material) using ER 309L Mo for the clad portion and E7018 for the rest.

Now we have to weld SA240 410S to SA240 410 S material for another job.

My question is, can we use the above said qualified PQR to make a wps of SA240 410S to SA240 410 S material, as other variables are same.

Thanking you,

Hareesh K V
+91-9447625012

[pgoswami]

Hello Harish,

 

You require a separate PQR for clad plate welding. Look through ASME Sec-IX. It will tell you the differences between welding techniques and requirements of clad  welding and Non-cladded construction.

If there’s a qualified PQR for Carbon Steel welding that may be referred for welding the C.S part of the cladded   construction.

 

For 410s clad restoration one should qualify an overlay PQR.

 

Thanks.

 

 

 

Pradip Goswami, P.Eng,IWE
Independent Welding & Metallurgical Engineering Specialist

Ontario,Canada.

 

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[Lalu Rajendran]

Hi,

No, You must qualify a separate PQR for P7 to P7 with ER 309LMo.

regards,

LALU

[makrand sakpal]

Is there any specific reason?

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[Kannayeram Gnanapandithan]

change in Pno is essential variable.

For P7toP7, why 309L?

THANKS & BEST REGARDS,

KG.PANDITHAN, IWE,  AWS-CWI, CSWIP 3.1,

CONSULTANT-WELDING & QUALITY

Mobile no: +919940739349

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[Lalu Rajendran]

Austenitic consumables (E309L) can be used for SS 410S material for temperature below 600 deg C due to sigma formation (Brittle phase) in the welds. Also PWHT can be avoided if you use E309L.

regards,

LALU 

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[Kannayeram Gnanapandithan]

What about strength?

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[Lalu Rajendran]

​Yield value of 410S is 30 ksi​. 

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[Hareesh K V]

Dear Sir,
There is no change in P No.
Please give me the reason with reference to ASME BPVC Sec IX.

Regards,

Hareesh K V

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[Raghuram Bathula]

what is your qulaified PQR weld sequence? i guess weld the P1 material first and clad restoration on top it

do u need new WPS for clad restoration or groove weld? any way either case you need to qualify new PQR

[George Dilintas]

according to qw-403.11 and qw-424 you need a new pqr

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Dr. Georgios Dilintas,

Dipl. Ing. In Aeronautic and Space Engineering

Ph.D in Mechanics of Solids - Computational Mechanics

A.I.S, A.N.I, IRCA Lead Auditor

Welding, Stress Analysis, Corrosion, QA/QC, Failure Analysis, Risk Analysis