Re: [MW:27332] P-22 plate welding ...6-MM plate

Hi ! 

Probable causes

a post heating say.300 to 350 c

b baking of electrodes properrly in oven say at 300 to 350 c with adequet holding time

c check bead thk.Should not be excessive

d distortion of jt.during.welding

Regards

Hegde

Sent from Yahoo Mail on Android

On Sun, 11 Feb 2018 at 16:42, pradip kumar Sil

<pradipsil@gmail.com> wrote:

Dear Everybody,

We are doing  P-22 plate welding, thickness is 6 mm with E-9018B3 ( Dia 2.5 mm) electrode. Preheat is 150 to 200 degree centigrade with little beveling. Site is near the sea area.

We found lot of delayed crack  generally after 12 hours. Crack is coming middle of the weldment.

Can anybody inform me cause & corrective action for the same. 

Pic attached for your ready reference.

Thanks in advance.

Regards,

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