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[MW:2380] RE: 2372] Re: WELD OVERLAY

By Materials & Welding

Hi!

Generally For i)308 or 347 weld over lay  ,you require to use 309L barrier ,with subsequent layers by 308 or 347 to match the respective weld chemistry.  ( where you do not need Mo)Ii) For 316 chemistry , you require to use 309Mo as barrier layer

ii)Directly applying the 308/347/316 on CS/ LAS base , due to dilution of about 30-40%, the weld overlay get cracks ,therefore Rich alloy electrodes such as 309 /309Mo should be use to compensate the iron dilution and get crack free weld

Regards

 

Hegde P.B.

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Muhammed Ibrahim
Sent: Tuesday, June 09, 2009 4:45 PM
To: materials-welding@googlegroups.com
Subject: [MW:2372] Re: WELD OVERLAY

 

Dear Mahantesh,

 

ER 309LMo having More amount of molybdinum. When you apply 309LMo as barrier layer while dilution you will get Mo percent more to compensate the chemistry with subsequent ER 347 layer. Other wise if you directly apply 347 your final chemistry in two layer will not match with 347.

 

In incolnel we have to achive the chemistry by nconel only with two or three layer ( according to your welding parameter). There is no other consumable to get the final chemistry apart from inconel.

 

Regards,

 

Muhammed Ibrahim. PK



 

2009/6/9 MAHANTESH LONI <mahantloni@gmail.com>

Dear Friends

 

Pl send me article on weld overlay.

 

What is weld overlay

Why barrier layer requires ER309LMo & subsiquent layer requires ER347

When overlaying with Inconel alloys we dont use barrier layer ER309L why.

 

Regards

Mahantesh

 

 




--
Thanks & Regards
Muhammed Ibrahim PK



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