[MW:1947] RE: 1946] welding on tube by providing inside cooling

Dear sandy

Why do you want to pass water in the tube while welding It is not at all recommended. If you are worried about distortion , Better put sant or / some refractory powder in the tube to avoid distortion. Fast cooling will cause distortion and increase in hardness causing cracks

 

Regards

 

Hegde P.B.

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of sandy kumar
Sent: Tuesday, April 14, 2009 1:49 PM
To: materials-welding@googlegroups.com
Subject: [MW:1946] welding on tube by providing inside cooling

 

Hi everybody

I want ot weld a pad of 20thk X 25X75 mm on a tube o/d 75 mm and I/d 60 mm. i want to provide inside cooling in tube by providing water flow and after that i shall do welding. I want to know what effect that procedure produce on weld mtal due to increased cooling rate. The tube material is ST-52 and consumable is ER70S-6.

If anyone have solution then please give me.

 

Sandy

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