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Re: [MW:26914] using of ER308 filer.

By Materials & Welding
Mo + Ni in 316L for low temperature is bullshit
Mo is added to 316L for Chloride corrosion resistance
As is Mo also an ferrite promoting element, extra nickel has to be added to keep the ferrite content at reasonable levels (3-5%) for weldability (hot cracks)
When pipe is 304L there seems not to be any chloride corrosion resistance needed, so welding of 304L to 316L with a 304L matching electrode 308L is ok, also 316L is ok.
 
But welding shall be done according approved WPS, so welding with a 308L can still be a non-conformity, with the choice: scrap, repair or leave as is.
In this case I would prefer to leave as is, but a warning to both the welder and QC to follow the procedure for welding and consumable control is essential
 
Regards
 
Ir. J. Prinsen MSc/IWE
Metallurgical and Welding Engineer
 
Van: "Dinesh Somwanshi" <som.din@gmail.com>
Aan: materials-welding@googlegroups.com
Verzonden: Maandag 16 oktober 2017 04:25:21
Onderwerp: Re: [MW:26912] using of ER308 filer.

Dear . you were using material grade of 316l for low temp with added Mo. Ni%.

Using lower grade of filler equivalancies 308 against 316L not acceptable.

Thanking You,

With Regards..
Dinesh V Somwanshi
Api 570, Cswip 3.1,Bgas 2
Authorised Certified Piping, Welding, Painting Inspector.
00919881344135

On Oct 16, 2017 11:17 AM, "'sangram routray' via Materials & Welding" <materials-welding@googlegroups.com> wrote:
Dear group members ;
our sub-contractor welded one joint  304 PIPE to 316L valve by ER308 filler but client said its not acceptable.
can some one help me regarding above mater .
is it Acceptable or not? 
Answerd with some code or standard reference. 

 
Thanks & Regards

Sangramkeshari Routaray
Welding inspector


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