RE: [MW:23030] Dillmax 690 weld cracks

I would like to see the joints geometry, do you have WPSs and photos of the failed welds (cracking long an direction, etc), the welds/structures were already loaded (used , my e-mail is alexis_viteri@hotmail.com

Regards,

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Date: Mon, 30 Mar 2015 01:52:52 -0700
From: krishna.4969@gmail.com
To: materials-welding@googlegroups.com
Subject: Re: [MW:23018] Dillmax 690 weld cracks

Gas cutting & grinding...

thickness 40 to 48 mm

photo i'm sending to your mail id..

thanks..

 

On Monday, 30 March 2015 14:13:56 UTC+5:30, vanchi wrote:

what method was used for joint preparation? gas cutting, grinding , machining ? what is the thk of joint.? can you take a photo of cracked joint and send. my mail id : vanchinaths @gmail.com

On Mon, Mar 30, 2015 at 12:30 PM, RK <krishn...@gmail.com> wrote:

Hi..

 

We have used Dillimax 690PE material for our penstocks under construction.

Experienced delayed cracking in welds (after a month or so) in all most all the welds...in all 3 welding processes used SAW, SMAW, FCAW...cracks are only in the welds!!!

Process is PH 100-150 DegC, Interpass 200 Deg C and DHT 200-250 DegC for 3 hrs.

Can anyone have any idea what could be the reasons?? we are in soup...and not able to proceed further..

 

rgds

 

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