Re: [MW:34138] CLAD MATERIALS -WELDING WPS /PQR ERNiCrMo3 / 7018-1 Combination

Hi everyone

For joining the C.S pipe that cladded with Inconel 625, it should be fully welded by NiCrMo-3 (SMAW or GTAW). welding the root pass with NiCrMo-3 and filling the join with 7018 or other C.S consumable material is big mistake. because during welding we'll have dilution and We'll have Cr3C2, this composition will be deposited in the grain boundary and make the alloy very brittle.

If weld a test coupon with ER-NiCrMo-3 and E7018 you can see how easily it will be broken during the bending test.

I have more experience in welding the claldded pipe together and overlaying the pipe so feel free to contact me for more information.

Mehrab

Metallurgist and welding Engineer

On Sunday, April 18, 2021 at 1:50:46 AM UTC-4 PK M wrote:

Dear Sir,

Please Share that WPS.

pkm...@gmail.com

thank you.

On Wed, Apr 14, 2021 at 8:07 PM pravean ashok <gujula...@gmail.com> wrote:

Dear we have in our previous project

Clad material in AlHosan gas Abudhabi and we found there is no issue in that material go a head 

Regards

Pravean

On Wed, 14 Apr, 2021, 11:42 am PK M, <pkm...@gmail.com> wrote:

Hi experts,

 

CLAD MATERIALS -WELDING

 

We have the following Clad Pipe and we are preparing WPS /PQR to weld this SPOOL.

As I know we need to use ERNiCrMo3 / 7018-1 Combination (if GTAW+SMAW) to Complete weld.

But if anyone is having experience with this, please advise whether we will go with

 

GTAW - ER NiCrMo3 ( Root & Hot )

 

SMAW – E7018-1 (Balance Filling /Capping).

 

Please Explain any troubles may have happened regarding dilution or not.

 

Need Aramco and International code reference? If any one has a sample WPS/PQR Please share with us.

 

Any corrosion test or NDT

 

Waiting for your scientific and specific reply.

 

Thanks in Advance.

 

Pkm

pkm...@gmail.com

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