--Hi Jenish,
Typically, any weldolet welding involves, high volume of weld metal and high residual stress. SS 347H is prone to "Stress Relaxation Cracking" if the welding parameters, weld ferrite, welding consumable chemistry (C:Nb ratio)is not controlled & more..
Do a detailed inspection for the root cause. If the indications are due to common welding technique related, such as "LOF", then the solutions are easy. If these are cracks after Stabilizing HT then the above mentioned cracking is one of the root cause/s. One has to carefully grind and weld repair. Smaller areas may be repaired by "Controlled Deposition Technique".
You may find more resources in API -TR-942B.
Thanks.
Pradip Goswami.P.Eng, IWE.
Consulting Welding & Metallurgical Engineering Specialist
Linkedin: https://www.linkedin.com/in/pradip-goswami-2999855/
Email:pgoswami@rogers.com,pradip.goswami@gmail.com
Cell/Whasapp:1-905-9793232
From: materials-welding@googlegroups.com <materials-welding@googlegroups.com> On Behalf Of Jenish Mistry
Sent: Thursday, December 28, 2023 1:59 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:34716] After Stabilize Heat treatment of 347H weld material Linear indication observed
Hi sir ,
Thanks for your reply.
We already take action against your reply but is there any other factor which may lead to this kind of defect.
On Wed, Dec 27, 2023 at 7:48 PM Kannayeram Gnanapandithan <kgpandithan@gmail.com> wrote:
bead should be lightly Convex
On Tue, Dec 26, 2023, 11:26 AM Jenish Mistry <jenishmistry1992@gmail.com> wrote:
Hi sir,
Please refer attached Photograph.
On Mon, Dec 25, 2023 at 4:26 PM Raghuram Bathula <raghurambathula@gmail.com> wrote:
What kind of indication?
Could you Please share before and after HT photographs
On Mon, 25 Dec, 2023, 14:54 Jenish MISTRY, <jenishmistry1992@gmail.com> wrote:
Dear seniors ,
As stated subject ,We are facing linear indication on weldolet to Pipe joint after stabilize Heat treatment.
Pipe & Weldolet material : A 358 347H CL1 & SA 182 F 347H
Pipe & weldolet Size : 20" Sch. 120
Heat treatment Cycle : Soaking temperature : 886 - 905 ( Soaking time : 3 Hr. & 15 min. minimum)
Welding consumable : ER 347 with carbon greater than & equal to 0.04%.
Please give your inputs to eliminate linear indication.
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