Re: [MW:9032] reason for burnthrough defect

Hi Shankar,

Burn-through (too much penetration) is caused by having too much heat input in the weld zone. Please check the current, over current may be one reason for burnthrough.It happen when the speed is very slow so you can increase the travel speed. Burn- through  can  also  result  from  having  an  excessive amount of root opening.

 

regards,

 

 

Arun S Das

 

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From: shankark <shankark.qc@gmail.com>
To: Materials & Welding <materials-welding@googlegroups.com>
Sent: Thu, 30 December, 2010 9:00:24 PM
Subject: [MW:9023] reason for burnthrough defect

we got BT defect in smaw process welding using E6010 for root, and
E7018 for hotpass, capping. what could be the reason for this defect
and how we can avoid it.

thanks,
shankar

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