Re: [MW:24493] Dissimilar welding

Hi.
I recomended Preheat and PWHT. But you will have make PQR with PWHT.

Agustín Jiménez


Enviado desde mi smartphone Samsung Galaxy.

-------- Mensaje original --------
De: 'prem_nautiyal26' via Materials & Welding <materials-welding@googlegroups.com>
Fecha:11/03/2016 12:29 PM (GMT-04:30)
Para: materials-welding <materials-welding@googlegroups.com>
Cc:
Asunto: Re: [MW:24488] Dissimilar welding

Use E 309 MoL. 

Regards

Prem Nautiyal

Sent from Samsung Mobile

-------- Original message --------

From: Pravin G

Date:10/03/2016 9:56 PM (GMT-05:00)

To: 'Agustin Jimenez' via Materials & Welding

Subject: [MW:24479] Dissimilar welding

Dear Expert,

Recently we qualify new PQR with following variables:
Material: A516 Gr 70N to A204 TP316L [P1G2 - P8G1]
Thickness: 50mm
Joint: butt joint
Consumable: SMAW, E309L-16, 3.2mm
F No: 5, A no: 8

I did preheat before welding for both material, correct me I'm wrong.

Preheat & PWHT required for dissimilar welding?
Crack recognized immediately after welding, so I assume its hot crack.
Is it related to thermal expansion of CS which cause hot crack?

Kindly advise me how to overcome this defect?

Pravin Poornachandran

Sent from my iPhone

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