You have not mentioned anything about postheat and PWHT ?
PWHT is required after welding with E430 electrodes to achieve welds of adequate ductility.
Also what is the actual Cr content in the electrode. Excessive Cr will result in lower ductility.
Regards
Prem Nautiyal
On Thu, 10 Feb 2011 22:06:42 +0530 wrote
>dear guys, Request to give your comments for the below
>Material used for welding is SA 240 TP 410S weld over lay on carbon steel(SA 516 )
>Consumable used Barrier layer -Pure iron (electrode D& H 45S)Further layer E 430-15 (D& H 17Cr)Preheating temp-100:cInterpass temp-250c
>Weld overlay was done for 8mm on Carbon steel plate thickness 8mm.After welding there was some minor distortion ,to remove distortion slight straightening was done on jack.During starightening we noticed crack on overlay.
>I want to know why crack was developed ,how to overcome this situation.Advice what precaution to be taken to qualify this procedure.Why the weld overlay crack developed is there any other reason.
>thanks expecting you guys to replykrishna
>
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PREM S NAUTIYAL
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