[MW:0] disimilar welding

 

Dear All,

 

My site contractor to do pipe long seam welding of SA516 GR. 70 + SS316 cladded plate material. Back chip is not accessible of this joint.

 

They have query, if first complete SS316 welding by using 316 electrode/ filler wire & subsequent layer will be E- 309MO & E- 7018.

 

Is it acceptable? I think they should do welding with E- 309MO up to carbon steel after  316 welding.

 

Please advice.

 

 

 

Regards,

Sachin A Kavathekar

 

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