Thursday, February 13, 2014

Re: [MW:20088] Black spots on DSS Weld Joints.

Dear,

about process the welding don't have SLAG only SILICA.




Magalhães Júlio


Welding and Inspection Around the world









2014-02-13 9:49 GMT+03:00 Bharat Kumar <asopa.bharat@gmail.com>:
It looks like slag inclusion.


On 12 February 2014 15:08, Vasantharao <vasantharao@yahoo.in> wrote:
Dear Experts,

We observe Dark spots on Welding of Duplex Stainless Welds.  

Material is : UNS S31803 ,  Filler Wire for root - ER2594, rest ER2209.

Sample pictures are attached for reference.

Oxygen level in shielding / Purging maintained well below 0.2%.

Interpass <150 Deg.C

Pl. share your valuable information.

Thank you.

P.Rao

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Thanks & Regards,

A Bharat Kumar

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