Re: [MW:23033] Dillmax 690 weld cracks

Preheat is to low, should be 180°C,

What about moisture content of the consumable, heated storage, rebaking etc

Regards,

Weld-Tech vof
Jurgen Prinsen MSc IWE

----- Oorspronkelijk bericht -----
Van: "César Alexis Viteri Pérez" <alexis_viteri@hotmail.com>
Aan: "Material Welding" <materials-welding@googlegroups.com>
Verzonden: Woensdag 1 april 2015 20:47:53
Onderwerp: 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,


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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